.gitattributes

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-# Leave all line endings alone!
-* -text

Binary/Clean.cmd

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-@echo off
-if exist *.bin del *.bin
-if exist *.com del *.com
-if exist *.img del *.img
-if exist *.rom del *.rom
-if exist *.pdf del *.pdf
-if exist *.log del *.log
-if exist *.eeprom del *.eeprom

Binary/GPL-3.0.txt

@@ -1,674 +0,0 @@
-                    GNU GENERAL PUBLIC LICENSE
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-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.

Binary/ReadMe.txt

@@ -1,107 +0,0 @@
-***********************************************************************
-***                                                                 ***
-***                          R o m W B W                            ***
-***                                                                 ***
-***                    Z80/Z180 System Software                     ***
-***                                                                 ***
-***********************************************************************
-
-This directory ("Binary") is part of the RomWBW System Software 
-distribution archive.  It contains the completed binary outputs of 
-the build process.  As described below, these files are used to 
-assemble a working RetroBrew Computers system.
-
-The files in this directory are created by the build process that is 
-documented in the ReadMe.txt file in the Source directory.  When 
-released the directory is populated with the default output files.  
-However, the output of custom builds will be placed in this directory 
-as well.
-
-ROM Firmware Images (<plt>_<cfg>.rom)
--------------------------------------
-
-The files with a ".rom" extension are binary images ready to program 
-into an appropriate PROM.  These files are named with the format 
-<plt>_<cfg>.rom. <plt> refers to the primary platform such as Zeta, 
-N8, Mark IV, etc.  <cfg> refers to the specific configuration.  When 
-released, there will be a standard configuration ("std") for each 
-platform.  So, for example, the file called MK4_std.rom is a ROM 
-image for the Mark IV with the standard configuration. If a custom 
-configuration called "custom" is created and built, a new file called 
-MK4_custom.rom will be added to this directory.
-
-Documentation of the pre-built ROM Images is contained in the 
-RomList.txt file.
-
-ROM Executable Images (<plt>_<cfg>.com)
----------------------------------------
-
-When a ROM image (".rom") is created, an executable version of the 
-ROM is also created.  These files have the same naming convention as 
-the ROM Image files, but have the extension ".com".  These files can 
-be copied to a working system and run like a normal application.
-
-When run on the target system, they install in RAM just like they had 
-been programmed into the ROM.  This allows a new ROM build to be 
-tested without reprogramming the actual ROM.
-
-ROM Binary Images (<plt>_<cfg>.img)
------------------------------------
-
-Also when a ROM image is created, a third variation of the ROM is 
-created again with the same naming convention, but with the extension 
-of .img.  These files are similar to the .com files in that they can 
-be used to test a ROM build without actually programming a new ROM.  
-The .img files are specifically for loading via UNA from a FAT file 
-system.  The functionality of the UNA FAT file system loader is 
-beyond the scope of this document.
-
-VDU ROM Image (vdu.rom)
------------------------
-
-The VDU video board requires a dedicated onboard ROM containing the 
-font data.  The "vdu.rom" file contains the binary data to program 
-onto that chip.
-
-Disk Images (fd*.img, hd*.img)
-------------------------------
-
-RomWBW includes a mechanism for generating floppy disk and hard disk 
-binary images that are ready to copy directly to a floppy, hard disk, 
-CF Card, or SD Card which will then be ready for use in any 
-RomWBW-based system.
-
-Essentially, these files contain prepared floppy and hard disk images 
-with a large set of programs and related files.  By copying the 
-contents of these files to appropriate media as described below, you 
-can quickly create ready-to-use media.
-
-The fd*.img files are floppy disk images.  They are sized for 1.44MB 
-floppy media and can be copied to actual floppy disks using 
-RawWriteWin (as long as you have access to a floppy drive on your 
-Windows computer).  The resulting floppy disks will be usable on any 
-RomWBW-based system with floppy drive(s).
-
-Likewise, the hd*.img files are hard disk images.  Each file is 
-intended to be copied to the start of any type of hard disk media 
-(typically a CF Card or SD Card). The resulting media will be usable 
-on any RomWBW-based system that accepts the corresponding media type.
-
-Note that the contents of the floppy/hard disk images are created by 
-the BuildImages.cmd script in the Source directory.  Additional 
-information on how to generate custom disk images is found in the 
-Source\Images directory.
-
-Propeller ROM Images (*.eeprom)
--------------------------------
-
-The files with and extension of ".eeprom" contain the binary images 
-to be programmed into the Propeller-based boards.  The list below 
-indicates which file targets each of the Propeller board variants:
-
-	ParPortProp	ParPortProp.eeprom
-	PropIO V1	PropIO.eeprom
-	PropIO V2	PropIO2.eeprom
-
-Refer to the board documentation of the boards for more information 
-on how to program the EEPROMs on these boards.

Binary/RomList.txt

@@ -1,111 +0,0 @@
-***********************************************************************
-***                                                                 ***
-***                          R o m W B W                            ***
-***                                                                 ***
-***                    Z80/Z180 System Software                     ***
-***                                                                 ***
-***********************************************************************
-
-This directory ("Binary") is part of the RomWBW System Software 
-distribution archive.  Refer to the ReadMe.txt file in this 
-directory for more information on the overall contents of the 
-directory.
-
-When distributed, RomWBW contains a set of pre-built ROM images that 
-are ready to program onto the EEPROM of any of the Z80/Z180 based 
-RetroBrew Computers CPU boards.  Additionally, any custom built ROM 
-images will be placed in this directory.
-
-All of the pre-built ROM images are 512KB.  This size is compatible 
-with all of the Z80/Z180 systems.  Some systems can accept different 
-size ROM images.  Creating alternative sizes requires a custom ROM 
-build (see ReadMe.txt in the Source directory).
-
-It is critical that the right ROM Imgae be selected for the target 
-platform being used.  The table below indicates the correct ROM 
-image to use for each platform:
-
-	SBC V1/V2	SBC_std.rom
-	Zeta V1		ZETA_std.rom
-	Zeta V2		ZETA2_std.rom
-	N8		N8_std.rom
-	Mark IV		MK4_std.rom
-
-You will find there is one additional ROM image called 
-"UNA_std.rom". This ROM image is an UNA-based RomWBW ROM image.  As 
-such, this ROM image can be used on any Z80/Z180 platform supported 
-by John Coffman's UNA BIOS.  Refer to RetroBrew Computers Wiki for 
-more information on UNA hardware support.
-
-For each of the ROM Images (".rom"), there are corresponding files 
-with the extensions of ".com" and ".img".  The .com variant can be 
-copied to a functional RomWBW-based system and executed like a 
-normal application under CP/M or Z-System. This will load the new 
-ROM on-the-fly.  It is an excellent way to test a ROM Image before 
-actually burning it.  Similarly, the .img files can be loaded using 
-the UNA FAT loader for testing.
-
-All of the standard ROM Images are configured with:
- - 512KB ROM Disk
- - 512KB RAM Disk
- - 38.4Kbps baud serial console
- - Auto-discovery of all serial ports
-
-All hard disk type devices (IDE, PPIDE, CF Card, SD Card) will be 
-automatically assigned two drive letters per device.  The drive 
-letters will refer to the first 2 slices of the device. The ASSIGN 
-command can be used to display and reassign drives to disk devices 
-and slices as desired.
-
-Standard ROM Image Notes
-------------------------
-
-The standard ROM images will detect and install support for certain 
-devices and peripherals that are on-board or frequently used with 
-each platform as documented below.  If the device or peripheral is 
-not detected at boot, the ROM will simply bypass support 
-appropriately.
-
-SBC:
- - Includes support for PPIDE/CF Card(s) connected to on-board    
-   parallel port.
- - Includes support for CVDU and VGA3 boards.  If detected at
-   startup, support for video and keyboard is installed
-   including VT-100/ANSI terminal emulation.
- - Auto-detects PropIO or PropIO V2 and installs associated
-   video, keyboard and SD Card support if present.
- - If PropIO, PropIO V2, CVDU, or VGA hardware is detected,
-   initial console output is determined by JP2.  If JP2 is
-   shorted, console will go to on-board serial port, if JP2
-   is open, console will go to the detected video and keyboard
-   ports.
- - SBC V1 has a known race condition in the bank switching
-   circuit which is likely to cause system instability.  SBC
-   V2 does not have this issue.
-
-ZETA/ZETA2:
- - Includes support for on-board floppy disk controller and
-   two attached floppy disks.
- - Auto-detects ParPortProp and includes support for it if it
-   is attached.
- - If ParPortProp is installed, initial console output is
-   determined by JP1.  If JP1 is shorted, console will go to
-   on-board serial port, if JP1 is open, console will go to
-   ParPortProp video and keyboard ports.
-
-N8:
- - Includes support for on-board floppy disk controller and
-   two attached floppy disks.
- - Includes support for on-board TMS9918 video and keyboard
-   including VT-100/ANSI terminal emulation.
- - Includes support for on-board SD Card as hard disk and
-   assumes a production level N8 board (date code >= 2312).
-
-MK4:
- - Includes support for on-board IDE port (CF Card via adapter).
- - Includes support for on-board SD Card port.
- - Auto-detects PropIO or PropIO V2 and installs associated
-   video, keyboard and SD Card support if present.
- - Includes support for CVDU and VGA3 boards.  If detected at
-   startup, support for video and keyboard is installed
-   including VT-100/ANSI terminal emulation. 

Build.cmd

@@ -0,0 +1,4 @@
+@echo off
+setlocal
+cd Source
+call Build %*

BuildCommon.cmd

@@ -0,0 +1,4 @@
+@echo off
+setlocal
+cd Source
+call BuildCommon %*

Clean.cmd

@@ -0,0 +1,9 @@
+@echo off
+setlocal
+
+pushd Source && call Clean && popd
+
+if exist *.img del *.img /Q
+if exist debug.log del debug.log
+
+if exist Output\*.* del Output\*.* /Q

Doc/Build.txt

@@ -0,0 +1,340 @@
+Building a Custom ROM
+---------------------
+
+At present, the build environment assumes you are running
+a current version of Microsoft Windows (either 32-bit or
+64-bit).
+
+If you are using Linux, David Giles has contributed a Linux
+makefile that should work for you.  Please read the
+LinuxBuild.txt file for more information.
+
+All required tools are included in the distribution.  You
+should not need anything other than what comes as part of
+Windows or as part of the distribution.
+
+In summary, the process involves the 4 steps below:
+
+  1) Create/update configuration file
+
+  2) Update/Add/Delete any files you want incorporated in
+     the ROM Disk
+
+  3) Run the build script (or makefile if you prefer) and
+     confirm there are no errors.
+
+  4) Burn the resultant ROM image and try it.
+
+The process is really very simple.  In fact, you can
+essentially skip steps 1 & 2 if you want to try simply
+building one of the existing configurations.
+
+Each of the 4 steps above is described in more detail
+below.
+
+1. Create/Update Configuration File
+-----------------------------------
+
+The settings for a build are primarily controled by
+a configuration file that is included in the build
+process.  In order to customize your settings, you
+need to modify an existing configuration file or
+create your own.
+
+If you look in the Source directory, you will see
+a series of files named config_xxxx_yyyy.asm.  Each of
+them corresponds to one of the standard configurations
+listed in the ROMList.txt file.
+
+You have two choices.  You can simply modify the existing
+configuration file that is closest to your situation, or
+you can copy it to a new config_xxxx_yyyy.asm file and modify
+that.  I recommend that you copy one to your own name so
+that you will always have the unmodified standard configuration
+files left in place.  So, for example, you could just
+copy config_ZETA_std.asm to config_ZETA_wayne.asm.  You MUST
+name your config file as config_xxxx_yyyy.asm.  The xxxx's
+must match your platform (N8VEM, ZETA, N8, S2I, or S100).
+The yyyy's can be whatever you want.
+
+The config files are simply text files with various
+settings.  Open your target config file with your
+favorite text editor and modify the settings as desired.
+
+Unfortunately, I have not yet documented each of the
+settings in detail; that will be a separate document
+provided in the future.  However, there are comments
+in the config file that will probably be sufficient
+for the most part.
+
+2. Update/Add/Delete ROM Disk Files
+-----------------------------------
+
+The files that are included on the ROM Disk of your
+ROM are copied from a set of directories during the
+build process.  This allows you to have complete
+flexibility over the files you want included in your
+ROM.
+
+If you look at the RomDsk directory, you will see
+a variety of subdirectories.  These subdirectories
+contain the files that will be included in the
+ROM disk.  The build process will determine
+which subdirectories to include files from based
+on the following rules:
+
+First, all files from either std_512 or std_1024 will
+be incuded depending on on the size of the ROM you
+are building.  If you are building a 512KB ROM, then
+all the files from std_512KB will be included.  If you
+are building a 1MB ROM, then all the files from std_1024KB
+will be included.  Essentialy, the files in std_1204KB are
+a superset of the ones in std_512KB because there is more
+space available for the ROM drive.
+
+Second, all files from the directory that corresponds to
+your configuration file will be included.  If you build
+the "ZETA_std" configuration, all files in cfg_ZETA_std will
+be added.  Note that these files will be in addition
+to the files from the std_XXXKB directory.
+
+If you created your own config file (like config_ZETA_wayne.asm
+described above), you MUST create a subdirectory within
+the RomDsk directory and populate it with the files
+you want added.  Normally, you would include the
+files from the original standard config.  So, if
+you created config_ZETA_wayne.asm from config_ZETA_std.asm,
+then you would create a subdirectory in RomDsk called
+cfg_ZETA_wayne and copy all the files from cfg_ZETA_std to
+cfg_ZETA_wayne.
+
+3. Run the Build Process
+------------------------
+
+NOTE: The process described here is the more commonly
+used build script.  If you wish to use a makefile
+instead, refer to the comments in the makefile in
+the Source directory as an alternative to the
+process described here.
+
+The build involves running commands at the command
+prompt.  From a Command Prompt window, you will need
+to change to the high level directory for the build.
+Normally, you would be changing to the RomWBW directory
+unless you renamed it.
+
+First, you will need to build the components that are
+common to all configurations.  These components do not
+require any configuration.  To build these, use the
+following commands and ensure that they complete
+without error:
+
+	BuildZCPR-DJ
+	BuildApps2
+
+To run the main build and be prompted for required information,
+just enter "Build".  You will be prompted for the information
+described below and the build should run.  If an error is
+encountered, the build should stop and display an error
+in red text.
+
+If you immediately receive the error "the execution of 
+scripts is disabled on this system", then you will need to 
+change the PowerShell Execution-Polcy to "RemoteSigned".
+To do this, you need to right-click on FixPowerShell.cmd and
+choose "Run as Administrator" to make the change.  If is
+critical that you right-click and use "Run as Administrator"
+or the change will not work (you will get an error
+indicating "Access to the registry denied" if you fail to
+use "Run as Administrator".
+
+The build script will prompt you for the following information
+which you will need to provide (don't worry, it is simple):
+
+Platform:
+
+Respond with the name of the platform that you are targeting.
+It must be one of N8VEM, ZETA, N8, S2I, or S100.
+
+Configuration:
+
+Respond with the name of the configuration you wish to build.
+A list of all available configurations is displayed for your
+convenience.  For example, if you are building the provided
+ZETA_std configuration, just enter "std".  If you have created a
+custom configuration as described above, you would enter
+"wayne".
+
+ROM Size [512|1024]:
+
+Respond with either "512" for a 512KB ROM build or "1024" for a
+1MB ROM build.  Only the two choices are possible at this time.
+It is important that you choose a ROM size that is no larger than
+the szie of the ROM you will ultimately be burning.  This is 
+dependant on your hardware.
+
+At this point, the build should run and you will see output related
+to the assembler runs and some utility invocations.  Just review
+the output for any obvioius errors.  Normally, all errors will
+cause the build to stop immediately and display an error message
+in red.
+
+You will see some lines in the output indicating the amount of
+space variouis components have taken.  You should check these
+to make sure you do not see any negative numbers which would
+indicate that you have included too many features/drivers for
+the available memory space.  Here are examples of the lines
+showing the space used:
+
+	DATA space remaining: 39 bytes.
+	BOOT LOADER space remaining: 3503 bytes.
+	CBIOS space remaining: 161 bytes.
+	DBGMON space remaining: 860 bytes.
+	ROMX space remaining: 8191 bytes.
+	BOOT LOADER space remaining: 3503 bytes.
+
+4. Deploy the ROM
+-----------------
+
+If you look in the Output directory.  You should find the following files:
+
+     <config>.rom - binary ROM image to burn to EEPROM
+     <config>.sys - system image that can be written to the start of a
+                    disk to enable boot from disk functionality
+     <config>.com - executable version of the system image that can be
+                    copied via xmodem to a running system to test
+                    the build.
+
+The actual ROM image is the file ending in .rom.  It should be exactly
+512KB or 1MB depending on the ROM size you chose.  Simply burn the .rom
+image to your ROM and install it in your hardware.
+
+Specifying Build Options on Command Line
+----------------------------------------
+
+If you don't want to be prompted for the options to the "Build"
+command, you can specify the options right on the command line.
+
+For example:
+
+	Build ZETA std 512
+
+In this case, you will not be prompted.  This is useful if you
+wish to automate your build process.
+
+Example Build Run
+-----------------
+
+C:\Users\WWarthen\Projects\N8VEM\Build\RomWBW>Build.cmd
+Platform [N8VEM|ZETA|N8|S2I|S100]: ZETA
+Configurations available:
+ > ppp
+ > std
+Configuration: std
+ROM Size [512|1024]: 512
+
+Building ZETA_std: 512KB ROM configuration std for Z80...
+
+tasm -t80 -g3  ccpb03.asm cp.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  bdosb01.asm dos.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  syscfg.asm syscfg.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+Configuration: ZETA Z80 SBC, FLOPPY (AUTOSIZE), PPIDE (STD)
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3 -dBLD_SYS=SYS_CPM cbios.asm cbios.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+Configuration: ZETA Z80 SBC, FLOPPY (AUTOSIZE), PPIDE (STD)
+INFOLIST occupies 18 bytes.
+UTIL occupies 484 bytes.
+FD_DATA occupies 340 bytes.
+PPIDE_DATA occupies 1116 bytes.
+CBIOS space remaining: 2092 bytes.
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  dbgmon.asm dbgmon.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+Configuration: ZETA Z80 SBC, FLOPPY (AUTOSIZE), PPIDE (STD)
+DBGMON space remaining: 795 bytes.
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  prefix.asm prefix.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+Configuration: ZETA Z80 SBC, FLOPPY (AUTOSIZE), PPIDE (STD)
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  bootrom.asm bootrom.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+Configuration: ZETA Z80 SBC, FLOPPY (AUTOSIZE), PPIDE (STD)
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  bootapp.asm bootapp.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+Configuration: ZETA Z80 SBC, FLOPPY (AUTOSIZE), PPIDE (STD)
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  loader.asm loader.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+Configuration: ZETA Z80 SBC, FLOPPY (AUTOSIZE), PPIDE (STD)
+LOADER space remaining: 1205 bytes.
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  pgzero.asm pgzero.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  hbios.asm hbios.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+Configuration: ZETA Z80 SBC, FLOPPY (AUTOSIZE), PPIDE (STD)
+UART occupies 146 bytes.
+FD occupies 2071 bytes.
+PPIDE occupies 809 bytes.
+HBIOS space remaining: 24428 bytes.
+STACK space remaining: 145 bytes.
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  hbfill.asm hbfill.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+Configuration: ZETA Z80 SBC, FLOPPY (AUTOSIZE), PPIDE (STD)
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+tasm -t80 -g3  romfill.asm romfill.bin
+TASM Z80 Assembler.       Version 3.2 September, 2001.
+ Copyright (C) 2001 Squak Valley Software
+tasm: pass 1 complete.
+tasm: pass 2 complete.
+tasm: Number of errors = 0
+Building ZETA_std output files...
+Building 512KB ZETA_std ROM disk data file...
+
+C:\Users\WWarthen\Projects\N8VEM\Build\RomWBW>

Doc/ChangeLog.txt

@@ -1,49 +1,3 @@
-Version 2.8.3
--------------
-- WBW: Added MODE command
-- WBW: Removed obsolete 1200.COM, 9600.COM, and 38400.COM
-- WBW: New XM.COM that automatically adapts to primary port of platform
-- WBW: XM.COM now handles 38400 baud at 4MHz
-- WBW: Removed obsolete XM versions: XM5.COM, XM-A0.COM, XM-A1.COM
-
-Version 2.8.2
--------------
-- WBW: Adjusted VGA3 register setup per John's recommendations
-
-Version 2.8.1
--------------
-- WBW: Fix FDISK80
-- WBW: Upgrade to latest production UNA 2.1-45
-
-Version 2.8.0
--------------
-- WBW: Add support for VGA3 board
-
-Version 2.7.1
--------------
-- WBW: Replace ZX with XP compatible build (no functional changes)
-- WBW: Reset BDOS serial number on warm start
-- WBW: Turn off DRAM refresh on Z180 (fixes Z180 CPU speed detection)
-
-Version 2.7.0
--------------
-- WBW: Memory page reorganization
-- WBW: Support for Zeta 2 (from Sergey Kiselev)
-- WBW: Support loading from image file (UNA FSFAT)
-- WBW: Dynamic CPU speed detection
-
-Version 2.6.5
--------------
-- WBW: Yet more DS1302 clock driver delay mods
-
-Version 2.6.4
--------------
-- WBW: Yet more DS1302 clock driver delay mods
-
-Version 2.6.3
--------------
-- WBW: DS1302 clock driver modified to observe proper delays
-
 Version 2.6.2
 -------------
 - WBW: ASSIGN.COM substantially improved to map all drive types

Doc/Flash4.txt

@@ -5,21 +5,21 @@
 = Warning =
 
 FLASH4 has been tested and confirmed working on:
- * N8VEM SBCv2
- * N8VEM N8-2312
- * N8VEM Mark IV SBC
- * DX-Designs P112
- * ZETA SBC v2
+ * SBCv2
+ * N8-2312
+ * Mark IV SBC
 
 However it remains somewhat experimental. If it works for you, please let me
-know. If it breaks please also let me know so I can fix it!
+know. If it breaks please also let me know so I can fix it! Until it is more
+widely tested please ensure you have some other means to reprogram your flash
+ROM before exclusively trusting FLASH4.
 
 
 = Introduction =
 
 FLASH4 is a CP/M program which can read, write and verify Flash ROM contents to
 or from an image file stored on a CP/M filesystem. It is intended for in-system
-programming of Flash ROM chips on Z80 and Z180 systems.
+programming of Flash ROM chips on N8VEM Z80 and Z180 systems.
 
 FLASH4 aims to support a range of Flash ROM chips. Ideally I would like to
 support all Flash ROM chips that are in use in Z80/Z180 N8VEM machines. If
@@ -46,26 +46,23 @@ the "srec_cat" program from SRecord:
   $ srec_cat image.hex -intel -fill 0xFF 0 0x80000 -output image.bin -binary
   $ srec_cat image.bin -binary -output image.hex -intel
 
-FLASH4 can use several different methods to access the Flash ROM chip. The best
+FLASH4 can use three different methods to access the Flash ROM chip. The best
 available method is determined automatically at run time. Alternatively you may
 provide a command-line option to force the use of a specific method.
 
 The first two methods use bank switching to map sections of the ROM into the
 CPU address space. FLASH4 will detect the presence of RomWBW or UNA BIOS and
-use the bank switching methods they provide. 
+use the bank switching methods they provide.
 
-On P112 systems the P112 B/P BIOS is detected and P112 bank switching is used.
-
-If no bank switching method can be auto-detected, and the system has a Z180
-CPU, FLASH4 will use the Z180 DMA engine to access the Flash ROM chip. This
-does not require any bank switching but it is slower and will not work on all
-platforms.
+If neither RomWBW nor UNA BIOS is detected and the system has a Z180 CPU,
+FLASH4 will use the Z180 DMA engine to access the Flash ROM chip. This does not
+require any bank switching but it is slower and will not work on all platforms.
 
 Z180 DMA access requires the flash ROM to be linearly mapped into the lower
-region of physical memory, as it is on the Mark IV SBC (for example). The
-N8-2312 has additional memory mapping hardware, consequently Z180 DMA access on
-the N8-2312 is NOT SUPPORTED and if forced will corrupt the contents of RAM;
-use one of the supported bank switching methods instead.
+region of physical memory, as it is on the Mark IV SBC. The N8-2312 has
+additional memory mapping hardware, consequently Z180 DMA access on the N8-2312
+is NOT SUPPORTED and if forced will corrupt the contents of RAM; use bank
+switched access instead.
 
 Z180 DMA access requires the Z180 CPU I/O base control register configured to
 locate the internal I/O addresses at 0x40 (ie ICR bits IOA7, IOA6 = 0, 1).
@@ -96,27 +93,13 @@ If your ROM chip is larger than the image you wish to write, use the "/PARTIAL"
 the image file must be an exact multiple of 32KB in length. The portion of the
 ROM not occupied by the image file is left either unmodified or erased.
 
-If you are using an ROM/EPROM/EEPROM chip which cannot be programmed in-system,
-FLASH4 will not be able to recognise it, however the software can still
-usefully READ and VERIFY the chip. Use the "/ROM" command line option to enable
-"READ" or "VERIFY" mode with unrecognised chips. This mode assumes a 512K ROM
-is fitted; smaller ROMs will be treated as a 512K ROM with the data repated
-multiple times -- with a 256K chip the data is repeated twice, four times for a
-128K chip, etc.
-
 One of the following optional command line arguments may be specified at the
 end of the command line to force FLASH4 to use a particular method to access
 the flash ROM chip:
 
-BIOS interfaces:
-  /ROMWBW         For ROMWBW BIOS version 2.6 and later
-  /ROMWBWOLD      For ROMWBW BIOS version 2.5 and earlier
-  /UNABIOS        For UNA BIOS
-
-Direct hardware interfaces:
-  /Z180DMA        For Z180 DMA
-  /P112           For DX-Designs P112
-  /N8VEMSBC       For N8VEM SBC (v1, v2), Zeta (v1) SBC
+  /ROMWBW
+  /UNABIOS
+  /Z180DMA
 
 If no option is specified FLASH4 attempts to determine the best available
 method automatically.

Doc/ReadMe.txt

@@ -1,42 +0,0 @@
-***********************************************************************
-***                                                                 ***
-***                          R o m W B W                            ***
-***                                                                 ***
-***                    Z80/Z180 System Software                     ***
-***                                                                 ***
-***********************************************************************
-
-This directory ("Doc") is part of the RomWBW System Software 
-distribution archive.  It contains documentation for components of 
-the system.
-
-CPM Manual:
-
-The original DRI CP/M 2.x Operating System Manual.  This should be 
-considered the primary reference for system operation.  The section 
-on CP/M 2 Alteration can be ignored since this work has already been 
-completed as part of the RomWBW distribution.
-
-FDisk Manual:
-
-The operational manual for John Coffman's hard disk partitioning 
-program.  This program is included in RomWBW as FDISK80.
-
-RomWBW Architecture:
-
-Document describing the architecture of the RomWBW HBIOS.  It 
-includes reference information for the HBIOS calls.
-
-ZCPR Manual:
-
-ZCPR is the command proccessor portion of Z-System.  This is the 
-manual for ZCPR 1.x as included in RomWBW.  The installation 
-instructions can be ignored since that work has already been 
-completed as part of the RomWBW distribution.
-
-ZSDOS Manual:
-
-ZSDOS is the DOS portion of Z-System.  This is the manual fo ZSDOS 
-1.x as included in RomWBW.  The installation instructions can be 
-ignored since that work has already been completed as part of the 
-RomWBW distribution.

Doc/Reference/zcpr.doc

@@ -1,6 +1,3 @@
-
-
-
              ZCPR - A Z80 Replacement for the CP/M CCP
 
 
@@ -8,7 +5,7 @@
 
 
 
-     \textbf{Documentation on ZCPR - A Z80 Replacement for the CP/M CCP}
+     Documentation on ZCPR - A Z80 Replacement for the CP/M CCP
 
 
 
@@ -71,7 +68,7 @@
 
 
 
-     \textbf{Documentation on ZCPR - A Z80 Replacement for the CP/M CCP}
+     Documentation on ZCPR - A Z80 Replacement for the CP/M CCP
 
 
 
@@ -241,7 +238,6 @@
   integration  is  the placement of the new ZCPR onto disk  in  the 
   proper  place so that it will be loaded with the rest of CP/M  on 
   cold boot and executed properly.
-
        To find the original CCP, you typically have to locate it by 
   its appearance.   It is probably stored contiguously on disk, so, 
   once it is found, a sequential overwrite is all that is required.  
@@ -259,6 +255,7 @@
   CCP.   The  CCP will probably start on an even page or  half-page 
   address (like 900H, 980H, 1100H, etc).
 
+
                                                 Page 4
 
 
@@ -371,7 +368,7 @@
   -^C            <-- Return to CP/M; I know that CPRLOC will be
                       BD00H and the IMAGE offset is 1100H
 
-  B>ed cpr.asm \{edit ZCPR here and place CPRLOC=BD00H\}#  
+  B>ed cpr.asm {edit ZCPR here and place CPRLOC=BD00H}#  
           -- Detail Left Out --
 
   B>mac cpr $pz sz         <-- Now to assemble the CPR
@@ -747,7 +744,7 @@
        To  illustrate this command hierarchy search,  consider  the 
   following examples:
 
-  Example 1:  DEFUSR equ 0 \{default user number is 0\}
+  Example 1:  DEFUSR equ 0 {default user number is 0}
 
   B10>           <-- User is on Drive B:, User Number 10
   B10>ASM TEST.BBZ    <-- User wishes to assemble TEST.ASM in
@@ -813,9 +810,9 @@
   issued from the console (or Indirect Command File):
 
   B10>WM TEST2.TXT
-  ^   ^  ^-------- File to be edited
-  |   +----------- Invoke the WM.COM file (Word Master editor)
-  +--------------- User is on Drive B: in User Area 10
+   \   \    \__ File to be edited
+    \   \__ Invoke the WM.COM file (Word Master editor)
+     \__ User is on Drive B: in User Area 10
 
        Results:
             ZCPR searches B:  User 10, B: User 0, and A: User 0 for 
@@ -823,8 +820,8 @@
   back into B: User 10, and executes it.
 
   B10>MBASIC
-  ^   ^----- Invoke the MBASIC.COM file (MBASIC Interpreter)
-  +--------- User is on Drive B: in User Area 10
+   \    \__ Invoke the MBASIC.COM file (MBASIC Interpreter)
+    \__ User is on Drive B: in User Area 10
 
        Results:
             ZCPR searches B:  User 10 and B: User 0 for MBASIC.COM; 
@@ -833,8 +830,8 @@
   in the previous example.
 
   B10>TEST
-  ^   ^--- Invoke the TEST.COM file (TEST program)
-  +------- User is on Drive B: in User Area 10
+    \   \__ Invoke the TEST.COM file (TEST program)
+     \__ User is on Drive B: in User Area 10
 
        Results:
             ZCPR  searches  B:  User  10  for  TEST.COM;  it  finds 
@@ -843,8 +840,8 @@
   then loaded and executed as described above.
 
   B10>TEST2
-   |   +--- Invoke the TEST2.COM file (TEST2 program)
-   +------- User is on Drive B: in User Area 10
+    \    \__ Invoke the TEST2.COM file (TEST2 program)
+     \__ User is on Drive B: in User Area 10
 
        Results:
             ZCPR searches B:  User 10, B: User 0, and A: User 0 for 
@@ -1381,4 +1378,10 @@
 
 
 
-                                                Page 21
+                                                Page 21
+
+
+
+
+
+

Doc/ZSystem.txt

@@ -14,7 +14,7 @@ Beyond the construction and integration of the actual DOS itself, the majority o
 
 The remainder of this document details the changes I made as I went along.  In all cases, my goal was to keep the result as close to the original distribution as possible.  I started by copying all of the files from the distribution (contained in zsdos2.zip) into Support\ZSDOS.  From there I tested, modified, updated, and customized as documented below.  Finally, I cherry picked files that made sense to include on the ZSystem ROM disks.
 
-1. CLOCKS.DAT has been updated to include the RomWBW clock driver, HBCLK.  I have also added the SIMHCLOK clock driver.
+1. CLOCKS.DAT has been updated to include the N8VEM clock drivers, N8VEMCLK AND N8CLK.  I have also added the SIMHCLOK clock driver.
 
 2. STAMPS.DAT has been replaced with an updated version.  The update was called STAMPS11.DAT and was found on the Walnut Creek CP/M CDROM.  The original version has a bug that prevents RSX (resident system extension) mode to load properly.
 

FixPowerShell.cmd

@@ -0,0 +1,29 @@
+@echo off
+echo By default, PowerShell is configured to block the
+echo execution of unsigned scripts on your local system.
+echo This command file will attempt to modify your
+echo PowerShell ExecutionPolicy to "Unrestricted"
+echo which means that local scripts can be run without
+echo being signed.  This is required to use the RomWBW
+echo build process.
+echo.
+PowerShell -command Write-Host "Your PowerShell ExecutionPolicy is currently set to: `'(Get-ExecutionPolicy)`'"
+echo.
+echo In order to modify the ExecutionPolicy, this command
+echo file *MUST* be run with administrator privileges.
+echo Generally, this means you want to right-click the
+echo command file called FixPowerShell.cmd and choose
+echo "Run as Administrator".  If you attempt to continue
+echo without administrator privileges, the modification
+echo will fail with an error message, but no harm is done.
+echo.
+choice /m "Do you want to proceed"
+if errorlevel 2 goto :eof
+echo.
+echo Attempting to change Execution Policy...
+echo.
+PowerShell Set-ExecutionPolicy Unrestricted
+echo.
+PowerShell -command Write-Host "Your new PowerShell ExecutionPolicy is now set to: `'(Get-ExecutionPolicy)`'"
+echo.
+pause

Hardware/ParPortProp/Spin/VGA_1024.spin

@@ -122,18 +122,19 @@ PUB clrbtm(ColorVal) | i
    repeat i from 36 to rows - 1                         'was 35
     colors[i] := $0000 + ColorVal
 
-PUB cls1(VerStr) | i
+PUB cls1(c,screencolor,pcport,ascii,CR) | i,x,y
 
   longfill(@screen[0], $20202020, chars / 4)
 
   clrbtm(TURQUOISE)
   
   inverse := 1
-  statprint(36, 0, VerStr)
-  inverse := 0
 
-  repeat i from 37 to (rows - 1)    
-    statprint(i,0, string("                                                                                "))
+  statprint(36,0, string("                         N8VEM ParPortProp | RomWBW                        v0.92"))
+  inverse := 0
+  statprint(37,0, string("                                                                                "))
+  statprint(38,0, string("                                                                                "))
+  statprint(39,0, string("                                                                                "))
 
  
 {{
@@ -151,7 +152,7 @@ PUB cls1(VerStr) | i
   yloc :=36
   loc  := xloc + yloc*cols
   inverse := 1
-  str(string("                                                                                "))
+  str(string("                                    propIO  V 0.91                              "))
   inverse := 0
   str(string("Baud Rate: "))
   i:= BR[6]
@@ -214,7 +215,7 @@ PUB clsupdate(c,screencolor,PCPORT,ascii,CR) | i,x,y,locold
   yloc :=36
   loc  := xloc + yloc*cols
   inverse := 1
-  str(string("                                                                                "))
+  str(string("                                    propIO  V 0.81                              "))
   inverse := 0
   xloc := 0
   yloc :=37

Hardware/ParPortProp/Spin/safe_spi.spin

@@ -25,9 +25,6 @@ CON
   ERR_3v3_NOT_SUPPORTED         = -2
   ERR_OCR_FAILED                = -3
   ERR_BLOCK_NOT_LONG_ALIGNED    = -4
-  ERR_CRC_ONOFF_FAILED          = -5
-  ERR_STATUS_FAILED             = -6
-  ERR_CSD_FAILED                = -7
   '...
   ' These errors are for the assembly engine...they are negated inside, and need to be <= 511
   ERR_ASM_NO_READ_TOKEN         = 100
@@ -61,17 +58,14 @@ CON
   ' buffer size for my debug cmd log
   'LOG_SIZE = 256<<1
 
-
+{
 VAR
-  'long SPI_engine_cog
-  '' these are used for interfacing with the assembly engine | temporary initialization usage
-  'long SPI_command              ' "t", "r", "w", 0 =>done, <0 => error          | pin mask
-  'long SPI_block_index          ' which 512-byte block to read/write            | cnt at init
-  'long SPI_buffer_address       ' where to get/put the data in Hub RAM          | unused
-
-  'long  SPI_capacity
-  'byte  SPI_csdbuf[16]
-
+  long SPI_engine_cog
+  ' these are used for interfacing with the assembly engine | temporary initialization usage
+  long SPI_command              ' "t", "r", "w", 0 =>done, <0 => error          | pin mask
+  long SPI_block_index          ' which 512-byte block to read/write            | cnt at init
+  long SPI_buffer_address       ' where to get/put the data in Hub RAM          | unused
+'}
 DAT
 '' I'm placing these variables in a DAT section to make this driver a singleton.
 '' If for some reason you really need more than one driver (e.g. if you have more
@@ -82,9 +76,6 @@ SPI_command             long 0  ' "t", "r", "w", 0 =>done, <0 => error
 SPI_block_index         long 0  ' which 512-byte block to read/write            | cnt at init
 SPI_buffer_address      long 0  ' where to get/put the data in Hub RAM          | unused
 
-SPI_capacity            long 0
-SPI_csdbuf              byte 0 [16]
-
 {
 VAR
   ' for debug ONLY
@@ -124,12 +115,6 @@ PUB writeblock( block_index, buffer_address )
   if SPI_command < 0
     abort SPI_command
 
-PUB getcapacity
-  Result := SPI_capacity
-
-PUB getcsd( buffer_address )
-  bytemove(buffer_address, @SPI_csdbuf, 16)
-
 PUB get_seconds
   if SPI_engine_cog == 0
     abort ERR_SPI_ENGINE_NOT_RUNNING
@@ -154,8 +139,6 @@ PUB start_explicit( DO, CLK, DI, CS ) : card_type | tmp, i
 }}
   ' Start from scratch
   stop
-  ' Reset card capacity
-  SPI_capacity := 0
   ' clear my log buffer
   {
   bytefill( @log_cmd_resp, 0, LOG_SIZE+1 )
@@ -234,48 +217,10 @@ PUB start_explicit( DO, CLK, DI, CS ) : card_type | tmp, i
       repeat while send_cmd_slow( CMD1, 0, $F9 )
     ' some SD or MMC cards may have the wrong block size, set it here
     send_cmd_slow( CMD16, 512, $15 )
-
   ' card is mounted, make sure the CRC is turned off
-  if send_cmd_slow( CMD59, 0, $91 ) <> 0
-    crash( ERR_CRC_ONOFF_FAILED )
-
-  '  check card status
-  if send_cmd_slow ( CMD13, 0, $FF) <> 0
-    crash( ERR_STATUS_FAILED )
-  read_slow                    ' swallow second byte of status
-    
-  '  get card capacity
-  if send_cmd_slow ( CMD9, 0, $FF) <> 0
-    crash( ERR_CSD_FAILED )
-  i := 32                       ' arbitrary timeout
-  repeat while (read_slow <> $FE)
-    if i == 0
-      crash( ERR_CSD_FAILED )
-  repeat i from 0 to 15         ' 16 bytes of CSD data
-    SPI_csdbuf[i] := read_slow
-  read_slow                     ' discard CRC - first byte
-  read_slow                     ' discard CRC - second byte
-
-  case (card_type)
-    type_MMC, type_SD:
-      tmp := SPI_csdbuf[9]
-      tmp := (tmp << 8) | SPI_csdbuf[10]
-      i := ((tmp >> 7) & $07)   ' c_size_mult
-      tmp := SPI_csdbuf[5]
-      i += tmp & $0F            ' mask out read_bl_len and add to c_size_mult
-      tmp := SPI_csdbuf[6] & $03
-      tmp := (tmp << 8) | SPI_csdbuf[7]
-      tmp := (tmp << 8) | SPI_csdbuf[8]
-      tmp := (tmp >> 6)           ' c_size
-      SPI_capacity := ((tmp + 1) << (2 + i)) >> 9 
-    type_SDHC:
-      tmp := SPI_csdbuf[7] & $3F
-      tmp := (tmp << 8) | SPI_csdbuf[8]    
-      tmp := (tmp << 8) | SPI_csdbuf[9]
-      SPI_capacity := (tmp + 1) * 1024
-    other:
-      SPI_capacity := 0
-
+  send_cmd_slow( CMD59, 0, $91 )
+  '  check the status
+  'send_cmd_slow( CMD13, 0, $0D )    
   ' done with the SPI bus for now
   outa |= maskCS
   ' set my counter modes for super fast SPI operation

Hardware/PropIO/Spin/VGA_1024.spin

@@ -0,0 +1,704 @@
+'' VGA_1024.spin
+''
+'' MODIFIED BY VINCE BRIEL FOR POCKETERM FEATURES
+'' MODIIFED BY JEFF LEDGER / AKA OLDBITCOLLECTOR
+''
+
+CON
+  cols          = 80 '128                               ' number of screen columns
+  lcols         = cols / 4                              ' number of long in columns
+  rows          = 40 '64                                ' number of screen rows
+  chars         = rows*cols                             ' number of screen characters
+  esc           = $CB                                   ' keyboard esc char
+  rowsnow       = 36                                    ' adjusted for split screen effect
+  maxChars      = rowsnow*cols                          ' adjusted value for split screen effect
+  lastChar      = maxChars / 4                          ' last screen position in longs adjusted for split
+  lastLine      = (rowsnow - 1) * cols                  ' character position of last row
+  cols1         = 81                                    ' adjusted value for 80th character
+  TURQUOISE     = $29
+
+OBJ
+  vga : "vga_Hires_Text"
+
+VAR
+  byte  screen[chars]           ' screen character buffer
+  byte  tmpl[cols]              ' temporary line buffer
+  word  colors[rows]            ' color specs for each screen row (see ColorPtr description above)
+  byte  cursor[6]               ' cursor info array (see CursorPtr description above)
+  long  sync, loc, xloc, yloc   ' sync used by VGA routine, others are local screen pointers
+  long  kbdreq                  ' global val of kbdflag
+  long  BR[8]
+  long  Brate
+  byte  inverse
+  byte  invs
+  byte  state                   ' Current state of state machine
+  word  pos                     ' Current Position on the screen
+  word  oldpos                  ' Previous location of cursor before update
+  word  regionTop, regionBot    ' Scroll region top/bottom
+  long  arg0                    ' First argument of escape sequence
+  long  arg1                    ' Second argument of escape sequence
+  byte  lastc                   ' Last displayed char
+  word  statpos
+  long  vgabasepin
+  
+PUB start(BasePin) | i, char
+  vgabasepin := BasePin
+
+''init screen colors to gold on blue
+  repeat i from 0 to rows - 1
+    colors[i] := $08F0          '$2804 (if you want cyan on blue)
+
+''init cursor attributes
+  cursor[2] := %110             ' init cursor to underscore with slow blink
+  BR[0]:=300 
+  BR[1]:=1200
+  BR[2]:=2400
+  BR[3]:=4800
+  BR[4]:=9600
+  BR[5]:=19200
+  BR[6]:=38400
+  BR[7]:=57600
+  BR[8]:=115200
+  xloc := cursor[0] := 0
+  yloc := cursor[1] := 0
+  loc  := xloc + yloc*cols
+  
+  pos := 0
+  regionTop := 0
+  regionBot := 35 * cols
+  state := 0
+  statpos := 37 * cols
+
+PUB vidon
+  if (!vga.start(vgabasepin, @screen, @colors, @cursor, @sync))
+    return false
+  
+  waitcnt(clkfreq * 1 + cnt)    'wait 1 second for cogs to start
+
+
+PUB vidoff
+  vga.stop
+
+  
+PUB inv(c)
+  inverse:=c
+
+PUB color(colorVal) | i
+  repeat i from 0 to rows - 1
+    colors[i] := $0000 | colorVal
+
+PUB cursorset(c) | i
+  i:=%000
+  if c == 1
+    i:= %001
+  if c == 2
+    i:= %010
+  if c == 3
+    i:= %011
+  if c == 4
+    i:= %101
+  if c == 5
+    i:= %110
+  if c == 6
+    i:= %111
+  if c == 7
+    i:= %000  
+  cursor[2] := i
+  
+PUB bin(value, digits)
+
+'' Print a binary number, specify number of digits
+
+  repeat while digits > 32
+    outc("0")
+    digits--
+
+  value <<= 32 - digits
+
+  repeat digits
+    outc((value <-= 1) & 1 + "0")
+
+
+PUB clrbtm(ColorVal) | i
+   repeat i from 36 to rows - 1                         'was 35
+    colors[i] := $0000 + ColorVal
+
+PUB cls1(c,screencolor,pcport,ascii,CR) | i,x,y
+
+  longfill(@screen[0], $20202020, chars / 4)
+
+  clrbtm(TURQUOISE)
+  
+  inverse := 1
+
+  statprint(36,0, string("                           N8VEM PropIO | RomWBW                           v0.94"))
+  inverse := 0
+  statprint(37,0, string("                                                                                "))
+  statprint(38,0, string("                                                                                "))
+  statprint(39,0, string("                                                                                "))
+
+ 
+{{
+  x :=xloc
+  y := yloc
+  invs := inverse
+  ''clrbtm(TURQUOISE)
+  longfill(@screen, $20202020, chars/4)
+  xloc := 0
+  yloc :=0
+  loc  := xloc + yloc*cols
+  repeat 80
+     outc(32)
+  xloc := 0
+  yloc :=36
+  loc  := xloc + yloc*cols
+  inverse := 1
+  str(string("                                    propIO  V 0.91                              "))
+  inverse := 0
+  str(string("Baud Rate: "))
+  i:= BR[6]
+  dec(i)
+  str(string("   "))
+  xloc := 18
+  loc := xloc + yloc*cols
+  str(string("Color  "))
+  str(string("PC Port: "))
+  if pcport == 1
+     str(string("OFF "))
+  if pcport == 0
+     str(string("ON  "))   
+  str(string(" Force 7 bit: "))
+  if ascii == 0
+     str(string("NO  "))
+  if ascii == 1
+     str(string("YES "))
+  str(string(" Cursor   CR W/LF: "))
+  if CR == 1
+     str(string("YES"))
+  if CR == 0
+     str(string("NO "))  
+  outc(13)
+  outc(10)
+  
+  inverse:=1
+  xloc := 6
+  loc  := xloc + yloc*cols
+  str(string("F1"))
+  xloc := 19
+  loc  := xloc + yloc*cols
+  str(string("F2"))
+  xloc := 30
+  loc  := xloc + yloc*cols
+  str(string("F3"))
+  xloc := 46
+  loc  := xloc + yloc*cols
+  str(string("F4"))
+  xloc := 58
+  loc  := xloc + yloc*cols
+  str(string("F5"))
+  xloc := 70
+  loc  := xloc + yloc*cols
+  str(string("F6")) 
+  inverse := invs
+  xloc := cursor[0] := x 'right & left       was 0
+  yloc := cursor[1] := y 'from top           was 1
+  loc  := xloc + yloc*cols
+}}
+
+PUB clsupdate(c,screencolor,PCPORT,ascii,CR) | i,x,y,locold
+        
+  invs := inverse
+  locold := loc
+  x := xloc
+  y := yloc
+  ''(TURQUOISE)
+  xloc := 0
+  yloc :=36
+  loc  := xloc + yloc*cols
+  inverse := 1
+  str(string("                                    propIO  V 0.81                              "))
+  inverse := 0
+  xloc := 0
+  yloc :=37
+  loc  := xloc + yloc*cols
+  str(string("Baud Rate: "))
+  i:= BR[6]
+  dec(i)
+  str(string("   "))
+  xloc := 18
+  loc := xloc + yloc*cols
+  
+  str(string("Color  "))
+  str(string("PC Port: "))
+  if pcport == 1
+     str(string("OFF "))
+  if pcport == 0
+     str(string("ON  "))   
+  str(string(" Force 7 bit: "))
+  if ascii == 0
+     str(string("NO  "))
+  if ascii == 1
+     str(string("YES "))
+  str(string(" Cursor   CR W/LF: "))
+  if CR == 1
+     str(string("YES"))
+  if CR == 0
+     str(string("NO "))  
+  xloc := 0
+  yloc :=38
+  loc  := xloc + yloc*cols
+  inverse:=1
+  xloc := 6
+  loc  := xloc + yloc*cols
+  str(string("F1"))
+  xloc := 19
+  loc  := xloc + yloc*cols
+  str(string("F2"))
+  xloc := 30
+  loc  := xloc + yloc*cols
+  str(string("F3"))
+  xloc := 46
+  loc  := xloc + yloc*cols
+  str(string("F4"))
+  xloc := 58
+  loc  := xloc + yloc*cols
+  str(string("F5"))
+  xloc := 70
+  loc  := xloc + yloc*cols
+  str(string("F6")) 
+  inverse := invs
+  xloc := cursor[0] := x
+  yloc := cursor[1] := y
+'  loc  := xloc + yloc*cols
+  loc := locold
+
+PUB dec(value) | i
+
+'' Print a decimal number
+
+  if value < 0
+    -value
+    outc("-")
+
+  i := 1_000_000_000
+
+  repeat 10
+    if value => i
+      outc(value/i + "0")
+      value //= i
+      result~~
+    elseif result or i == 1
+      outc("0")
+    i /= 10     
+
+PUB hex(value, digits)
+
+'' Print a hexadecimal number, specify number of digits
+
+  repeat while digits > 8
+    outc("0")
+    digits--
+
+  value <<= (8 - digits) << 2
+
+  repeat digits
+    outc(lookupz((value <-= 4) & $f : "0".."9", "A".."F"))
+
+
+PUB str(string_ptr)
+
+'' Print a zero terminated string
+
+  repeat strsize(string_ptr)
+    process_char(byte[string_ptr++])
+
+PUB statprint(r, c, str1) | x, ptr
+ 
+  ptr := r * cols + c
+  repeat x from 0 to STRSIZE(str1) - 1
+    putc(ptr++, BYTE[str1 + x])
+
+PUB statnum(r, c, num1)  | i, ptr
+
+  ptr := r * cols + c
+
+  if num1 < 0
+    -num1
+    putc(ptr++,"-")
+
+  i := 1_000_000_000
+
+  repeat 10
+    if num1 => i
+      putc(ptr++, (num1/i +"0"))
+      num1 //= i
+      result~~
+    elseif result or i == 1
+      putc(ptr++, "0")
+    i /= 10
+
+PUB putc(position, c)
+  if inverse
+    c |= $80
+  screen[position] := c
+  
+PUB cls
+  longfill (@screen, $20202020, lastChar)
+
+PUB fullcls
+  longfill(@screen, $20202020, 800)
+
+PUB setInverse(val)
+  inverse := val
+
+PUB setInv(c)
+  if c == 7
+    setInverse(1)
+  else
+    setInverse(0)
+  
+PUB clEOL(position) | count
+  count := cols - (position // cols)
+  bytefill(@screen + position, $20, count)
+
+PUB clBOL(position) | count
+  count := position // cols
+  bytefill(@screen + position - count, $20, count)
+
+PUB delLine(position) | src, count
+  position -= position // cols
+
+  src := position + cols
+
+  count := (maxChars - src) / 4
+
+  if count > 0
+    longmove(@screen + position, @screen + src, count)
+
+  longfill(@screen + lastLine, $20202020, lcols)
+
+PUB clEOS(position)
+  cleol(position)
+  position += cols - (position // cols)
+  repeat while position < maxChars
+    longfill(@screen + position, $20202020, lcols)
+    pos += cols
+
+PUB setCursorPos(position)
+  cursor[0] := position // cols
+  cursor[1] := position / cols
+
+PUB insLine(position) | base, nxt
+  base := position - (position // cols)
+  position := lastLine
+  repeat while position > base
+    nxt := position - cols
+    longmove(@screen + position, @screen + nxt, lcols)
+    position := nxt
+  clEOL(base)
+
+PUB insChar(position) | count
+  count := (cols - (position // cols)) - 1
+  bytemove(@tmpl, @screen + position, count)
+  screen[position] := " "
+  bytemove(@screen + position + 1, @tmpl, count)
+
+PUB delChar(position) | count
+  count := (cols - (position // cols)) - 1
+  bytemove(@screen + position, @screen + position + 1, count)
+  screen[position + count] := " "
+
+PRI inRegion : answer
+  answer := (pos => regionTop) AND (pos < regionBot)
+
+PRI scrollUp
+  delLine(regionTop)
+  if regionBot < maxChars
+    insLine(regionBot)
+
+PRI scrollDown
+  if regionBot < maxChars
+    delLine(regionBot)
+  insLine(regionTop)
+
+PRI ansi(c) | x, defVal
+
+  state := 0
+
+  if (c <> "r") AND (c <> "J") AND (c <> "m") AND (c <> "K")
+      if arg0 == -1
+          arg0 := 1
+      if arg1 == -1
+          arg1 := 1
+
+  case c
+    "@":
+      repeat while arg0-- > 0
+        insChar(pos)
+
+    "b":
+      repeat while arg0-- > 0
+        outc(lastc)
+
+    "d":
+      if (arg0 < 1) OR (arg0 > rows)
+        arg0 := rows
+      pos := ((arg0 - 1) * cols) + (pos // cols)
+
+    "m":
+      setInv(arg0)
+      if arg1 <> -1
+        setInv(arg1)
+
+    "r":
+      if arg0 < 1
+        arg0 := 1
+      elseif arg0 > cols
+        arg0 := cols
+      if arg1 < 1
+        arg1 := 1
+      elseif arg1 > cols
+        arg1 := cols
+      if arg1 < arg0
+        arg1 := arg0
+
+      regionTop := (arg0 - 1) * cols
+      regionBot := arg1 * cols
+      pos := 0
+
+    "A":
+      repeat while arg0-- > 0
+        pos -= cols
+        if pos < 0
+          pos += cols
+          return
+
+    "B":
+      repeat while arg0-- > 0
+        pos += cols
+        if pos => maxChars
+          pos -= cols
+          return
+
+    "C":
+      repeat while arg0-- > 0
+        pos += 1
+        if pos => maxChars
+          pos -= 1
+          return
+
+    "D":
+      repeat while arg0-- > 0
+        pos -= 1
+        if pos < 0
+          pos := 0
+          return
+
+    "G":
+      if (arg0 < 1) OR (arg0 > cols)
+        arg0 := cols
+     pos := (pos - (pos // cols)) + (arg0 - 1)
+
+    "H", "f":
+      if arg0 =< 0
+        arg0 := 1
+      if arg1 =< 0
+        arg1 := 1
+      pos := (cols * (arg0 - 1)) + (arg1 - 1)
+      if pos < 0
+        pos := 0
+      if pos => maxChars
+        pos := maxChars - 1
+
+    "J":
+      if arg0 == 1
+        clBOL(pos)
+        x := pos - cols
+        x -= x // cols
+        repeat while x => 0
+          clEOL(x)
+          x -= cols
+        return
+
+      if arg0 == 2
+        pos := 0
+
+      clEOL(pos)
+      x := pos + cols
+      x -= (x // cols)
+      repeat while x < maxChars
+        clEOL(x)
+        x += cols
+
+    "K":
+      if arg0 == -1
+          clEOL(pos)
+      elseif arg0 == 1
+          clBOL(pos)
+      else
+          clEOL(pos - (pos // cols))
+
+    "L":
+      if inRegion
+        repeat while arg0-- > 0
+          if regionBot < maxChars
+            delLine(regionBot)
+          insLine(pos)
+
+    "M":
+      if inRegion
+        repeat while arg0-- > 0
+          delLine(pos)
+          if regionBot < maxChars
+            insLine(regionBot)            
+
+    "P":
+      repeat while arg0--
+        delChar(pos)
+
+PRI outc(c)
+
+  putc(pos++, lastc := c)  
+  if pos == regionBot
+    scrollUp
+    pos -= cols
+  elseif pos == maxChars
+    pos := lastLine
+    
+PUB process_char(c)
+  
+  case state
+
+    0:
+      if c > 127
+        c := $20
+
+      if c => $20
+        outc(c)
+        setCursorPos(pos)
+        return
+
+      if c == $1B
+        state := 1
+        return
+
+      if c == $0D
+        pos := pos - (pos // cols)
+        setCursorPos(pos)
+        return
+
+      if c == $0A
+        if inRegion
+            pos += cols
+            if pos => regionBot
+               scrollUp
+               pos -= cols
+        else
+          pos += cols
+          if pos => maxChars
+            pos -= cols
+        setCursorPos(pos)
+        return
+
+      if c == 9
+        pos += (8 - (pos // 8))
+
+        if pos => maxChars
+         pos := lastLine
+         delLine(0)
+
+        setCursorPos(pos)
+       return
+
+     if c == 8
+       if pos > 0
+         pos -= 1
+       setCursorPos(pos)
+      return
+
+    1:
+      case c
+          "[":
+              arg0 := arg1 := -1
+              state := 2
+              return
+
+          "P":
+              pos += cols
+              if pos => maxChars
+                  pos -= cols
+
+          "K":
+              if pos > 0
+                  pos -= 1
+
+          "H":
+              pos -= cols
+              if pos < 0
+                  pos += cols
+
+          "D":
+              if inRegion
+                  scrollUp
+
+          "M":
+              if inRegion
+                  scrollDown
+
+          "G":
+              pos := 0
+
+          "(":
+              state := 5
+              return
+
+      state := 0
+      return
+
+   2:
+      if (c => "0") AND (c =< "9")
+          if arg0 == -1
+              arg0 := c - "0"
+          else
+              arg0 := (arg0 * 10) + (c - "0")
+          return
+
+      if c == ";"
+          state := 3
+          return
+
+      ansi(c)
+      setCursorPos(pos)
+      return
+
+   3:
+      if (c => "0") AND (c =< "9")
+          if arg1 == -1
+              arg1 := c - "0"
+          else
+              arg1 := (arg1 * 10) + (c - "0")
+          return
+
+      if c == ";"
+          state := 4
+          return
+
+      ansi(c)
+      setCursorPos(pos)
+      return
+
+   4:
+      if (c => "0") AND (c =< "9")
+          return
+
+      if c == ";"
+          return
+      ansi(c)
+      setCursorPos(pos)
+      return
+
+   5:
+    state := 0
+    return
+
+  return

Hardware/PropIO/Spin/safe_spi.spin

@@ -0,0 +1,920 @@
+{{
+  SPI interface routines for SD & SDHC & MMC cards
+
+  Jonathan "lonesock" Dummer
+  version 0.3.0  2009 July 19
+
+  Using multiblock SPI mode exclusively.
+
+  This is the "SAFE" version...uses
+  * 1 instruction per bit writes
+  * 2 instructions per bit reads
+
+  For the fsrw project:
+  fsrw.sf.net
+}}
+
+CON
+  ' possible card types
+  type_MMC      = 1
+  type_SD       = 2
+  type_SDHC     = 3
+  
+  ' Error codes
+  ERR_CARD_NOT_RESET            = -1
+  ERR_3v3_NOT_SUPPORTED         = -2
+  ERR_OCR_FAILED                = -3
+  ERR_BLOCK_NOT_LONG_ALIGNED    = -4
+  '...
+  ' These errors are for the assembly engine...they are negated inside, and need to be <= 511
+  ERR_ASM_NO_READ_TOKEN         = 100
+  ERR_ASM_BLOCK_NOT_WRITTEN     = 101
+  ' NOTE: errors -128 to -255 are reserved for reporting R1 response errors
+  '...
+  ERR_SPI_ENGINE_NOT_RUNNING    = -999
+  ERR_CARD_BUSY_TIMEOUT          = -1000
+
+  ' SDHC/SD/MMC command set for SPI
+  CMD0    = $40+0        ' GO_IDLE_STATE 
+  CMD1    = $40+1        ' SEND_OP_COND (MMC) 
+  ACMD41  = $C0+41       ' SEND_OP_COND (SDC) 
+  CMD8    = $40+8        ' SEND_IF_COND 
+  CMD9    = $40+9        ' SEND_CSD 
+  CMD10   = $40+10       ' SEND_CID 
+  CMD12   = $40+12       ' STOP_TRANSMISSION
+  CMD13   = $40+13       ' SEND_STATUS  
+  ACMD13  = $C0+13       ' SD_STATUS (SDC)
+  CMD16   = $40+16       ' SET_BLOCKLEN 
+  CMD17   = $40+17       ' READ_SINGLE_BLOCK 
+  CMD18   = $40+18       ' READ_MULTIPLE_BLOCK 
+  CMD23   = $40+23       ' SET_BLOCK_COUNT (MMC) 
+  ACMD23  = $C0+23       ' SET_WR_BLK_ERASE_COUNT (SDC)
+  CMD24   = $40+24       ' WRITE_BLOCK 
+  CMD25   = $40+25       ' WRITE_MULTIPLE_BLOCK 
+  CMD55   = $40+55       ' APP_CMD 
+  CMD58   = $40+58       ' READ_OCR
+  CMD59   = $40+59       ' CRC_ON_OFF 
+
+  ' buffer size for my debug cmd log
+  'LOG_SIZE = 256<<1
+
+{
+VAR
+  long SPI_engine_cog
+  ' these are used for interfacing with the assembly engine | temporary initialization usage
+  long SPI_command              ' "t", "r", "w", 0 =>done, <0 => error          | pin mask
+  long SPI_block_index          ' which 512-byte block to read/write            | cnt at init
+  long SPI_buffer_address       ' where to get/put the data in Hub RAM          | unused
+'}
+DAT
+'' I'm placing these variables in a DAT section to make this driver a singleton.
+'' If for some reason you really need more than one driver (e.g. if you have more
+'' than a single SD socket), move these back into VAR.
+SPI_engine_cog          long 0
+' these are used for interfacing with the assembly engine | temporary initialization usage
+SPI_command             long 0  ' "t", "r", "w", 0 =>done, <0 => error          | unused
+SPI_block_index         long 0  ' which 512-byte block to read/write            | cnt at init
+SPI_buffer_address      long 0  ' where to get/put the data in Hub RAM          | unused
+
+{
+VAR
+  ' for debug ONLY
+  byte log_cmd_resp[LOG_SIZE+1]
+PUB get_log_pointer
+  return @log_cmd_resp
+'}
+  
+PUB start( basepin )
+{{
+  This is a compatibility wrapper, and requires that the pins be
+  both consecutive, and in the order DO CLK DI CS.
+}}
+  return start_explicit( basepin, basepin+1, basepin+2, basepin+3 )
+
+PUB readblock( block_index, buffer_address )
+  if SPI_engine_cog == 0
+    abort ERR_SPI_ENGINE_NOT_RUNNING
+  if (buffer_address & 3)
+    abort ERR_BLOCK_NOT_LONG_ALIGNED
+  SPI_block_index := block_index
+  SPI_buffer_address := buffer_address
+  SPI_command := "r"
+  repeat while SPI_command == "r"
+  if SPI_command < 0
+    abort SPI_command
+
+PUB writeblock( block_index, buffer_address )
+  if SPI_engine_cog == 0
+    abort ERR_SPI_ENGINE_NOT_RUNNING
+  if (buffer_address & 3)
+    abort ERR_BLOCK_NOT_LONG_ALIGNED
+  SPI_block_index := block_index
+  SPI_buffer_address := buffer_address
+  SPI_command := "w"
+  repeat while SPI_command == "w"
+  if SPI_command < 0
+    abort SPI_command
+
+PUB get_seconds
+  if SPI_engine_cog == 0
+    abort ERR_SPI_ENGINE_NOT_RUNNING
+  SPI_command := "t"
+  repeat while SPI_command == "t"
+  ' secods are in SPI_block_index, remainder is in SPI_buffer_address
+  return SPI_block_index
+
+PUB get_milliseconds : ms
+  if SPI_engine_cog == 0
+    abort ERR_SPI_ENGINE_NOT_RUNNING
+  SPI_command := "t"
+  repeat while SPI_command == "t"
+  ' secods are in SPI_block_index, remainder is in SPI_buffer_address
+  ms := SPI_block_index * 1000
+  ms += SPI_buffer_address * 1000 / clkfreq
+  
+PUB start_explicit( DO, CLK, DI, CS ) : card_type | tmp, i
+{{
+  Do all of the card initialization in SPIN, then hand off the pin
+  information to the assembly cog for hot SPI block R/W action!
+}}
+  ' Start from scratch
+  stop
+  ' clear my log buffer
+  {
+  bytefill( @log_cmd_resp, 0, LOG_SIZE+1 )
+  dbg_ptr := @log_cmd_resp
+  dbg_end := dbg_ptr + LOG_SIZE
+  '}
+  ' wait ~4 milliseconds
+  waitcnt( 500 + (clkfreq>>8) + cnt )
+  ' (start with cog variables, _BEFORE_ loading the cog)
+  pinDO := DO
+  maskDO := |< DO
+  pinCLK := CLK
+  pinDI := DI
+  maskDI := |< DI
+  maskCS := |< CS
+  adrShift := 9 ' block = 512 * index, and 512 = 1<<9
+  ' pass the output pin mask via the command register
+  maskAll := maskCS | (|<pinCLK) | maskDI
+  dira |= maskAll  
+  ' get the card in a ready state: set DI and CS high, send => 74 clocks
+  outa |= maskAll
+  repeat 4096
+    outa[CLK]~~
+    outa[CLK]~
+  ' time-hack
+  SPI_block_index := cnt
+  ' reset the card
+  tmp~
+  repeat i from 0 to 9
+    if tmp <> 1
+      tmp := send_cmd_slow( CMD0, 0, $95 )
+      if (tmp & 4)
+        ' the card said CMD0 ("go idle") was invalid, so we're possibly stuck in read or write mode
+        if i & 1
+          ' exit multiblock read mode
+          repeat 4
+            read_32_slow        ' these extra clocks are required for some MMC cards
+          send_slow( $FD, 8 )   ' stop token
+          read_32_slow
+          repeat while read_slow <> $FF
+        else
+          ' exit multiblock read mode
+          send_cmd_slow( CMD12, 0, $61 )           
+  if tmp <> 1
+    ' the reset command failed!
+    crash( ERR_CARD_NOT_RESET )
+  ' Is this a SD type 2 card?
+  if send_cmd_slow( CMD8, $1AA, $87 ) == 1
+    ' Type2 SD, check to see if it's a SDHC card
+    tmp := read_32_slow
+  ' check the supported voltage
+    if (tmp & $1FF) <> $1AA
+      crash( ERR_3v3_NOT_SUPPORTED )
+    ' try to initialize the type 2 card with the High Capacity bit
+    repeat while send_cmd_slow( ACMD41, |<30, $77 )
+    ' the card is initialized, let's read back the High Capacity bit
+    if send_cmd_slow( CMD58, 0, $FD ) <> 0
+      crash( ERR_OCR_FAILED )
+    ' get back the data
+    tmp := read_32_slow
+    ' check the bit
+    if tmp & |<30
+      card_type := type_SDHC
+      adrShift := 0
+    else
+      card_type := type_SD
+  else
+    ' Either a type 1 SD card, or it's MMC, try SD 1st
+    if send_cmd_slow( ACMD41, 0, $E5 ) < 2
+      ' this is a type 1 SD card (1 means busy, 0 means done initializing)
+      card_type := type_SD
+      repeat while send_cmd_slow( ACMD41, 0, $E5 )
+    else
+      ' mark that it's MMC, and try to initialize
+      card_type := type_MMC
+      repeat while send_cmd_slow( CMD1, 0, $F9 )
+    ' some SD or MMC cards may have the wrong block size, set it here
+    send_cmd_slow( CMD16, 512, $15 )
+  ' card is mounted, make sure the CRC is turned off
+  send_cmd_slow( CMD59, 0, $91 )
+  '  check the status
+  'send_cmd_slow( CMD13, 0, $0D )    
+  ' done with the SPI bus for now
+  outa |= maskCS
+  ' set my counter modes for super fast SPI operation
+  ' writing: NCO single-ended mode, output on DI
+  writeMode := (%00100 << 26) | (DI << 0)
+  ' reading
+  'readMode := (%11000 << 26) | (DO << 0) | (CLK << 9)
+  ' clock
+  'clockLineMode := (%00110 << 26) | (CLK << 0) ' DUTY, 25% duty cycle
+  ' clock
+  clockLineMode := (%00100 << 26) | (CLK << 0) ' NCO, 50% duty cycle
+  ' how many bytes (8 clocks, >>3) fit into 1/2 of a second (>>1), 4 clocks per instruction (>>2)?
+  N_in8_500ms := clkfreq >> constant(1+2+3)
+  ' how long should we wait before auto-exiting any multiblock mode?
+  idle_limit := 125 ' ms, NEVER make this > 1000
+  idle_limit := clkfreq / (1000 / idle_limit) ' convert to counts
+  ' Hand off control to the assembly engine's cog  
+  bufAdr := @SPI_buffer_address
+  sdAdr := @SPI_block_index
+  SPI_command := 0 ' just make sure it's not 1
+  ' start my driver cog and wait till I hear back that it's done 
+  SPI_engine_cog := cognew( @SPI_engine_entry, @SPI_command ) + 1
+  if( SPI_engine_cog == 0 )
+    crash( ERR_SPI_ENGINE_NOT_RUNNING )
+  repeat while SPI_command <> -1
+  ' and we no longer need to control any pins from here
+  dira &= !maskAll
+  ' the return variable is card_type   
+
+PUB release
+{{
+  I do not want to abort if the cog is not
+  running, as this is called from stop, which
+  is called from start/ [8^)  
+}}
+  if SPI_engine_cog
+    SPI_command := "z"
+    repeat while SPI_command == "z"
+    
+PUB stop
+{{
+  kill the assembly driver cog.
+}}
+  release
+  if SPI_engine_cog
+    cogstop( SPI_engine_cog~ - 1 )
+
+PRI crash( abort_code )
+{{
+  In case of Bad Things(TM) happening,
+  exit as gracefully as possible.
+}}
+  ' and we no longer need to control any pins from here
+  dira &= !maskAll
+  ' and report our error
+  abort abort_code
+
+PRI send_cmd_slow( cmd, val, crc ) : reply | time_stamp
+{{
+  Send down a command and return the reply.
+  Note: slow is an understatement!
+  Note: this uses the assembly DAT variables for pin IDs,
+  which means that if you run this multiple times (say for
+  multiple SD cards), these values will change for each one.
+  But this is OK as all of these functions will be called
+  during the initialization only, before the PASM engine is
+  running.
+}}
+  ' if this is an application specific command, handle it
+  if (cmd & $80)
+    ' ACMD<n> is the command sequense of CMD55-CMD<n>
+      cmd &= $7F
+      reply := send_cmd_slow( CMD55, 0, $65 )
+      if (reply > 1)
+        return reply  
+  ' the CS line needs to go low during this operation
+  outa |= maskCS
+  outa &= !maskCS
+  ' give the card a few cocks to finish whatever it was doing
+  read_32_slow
+  ' send the command byte
+  send_slow( cmd, 8 )
+  ' send the value long
+  send_slow( val, 32 )   
+  ' send the CRC byte
+  send_slow( crc, 8 )
+  ' is this a CMD12?, if so, stuff byte
+  if cmd == CMD12
+    read_slow
+  ' read back the response (spec declares 1-8 reads max for SD, MMC is 0-8)
+  time_stamp := 9
+  repeat
+    reply := read_slow
+  while( reply & $80 ) and ( time_stamp-- )
+  ' done, and 'reply' is already pre-loaded
+  {
+  if dbg_ptr < (dbg_end-1)
+    byte[dbg_ptr++] := cmd
+    byte[dbg_ptr++] := reply
+    if (cmd&63) == 13
+      ' get the second byte
+      byte[dbg_ptr++] := cmd
+      byte[dbg_ptr++] := read_slow
+  '}  
+
+PRI send_slow( value, bits_to_send )
+  value ><= bits_to_send
+  repeat bits_to_send
+    outa[pinCLK]~
+    outa[pinDI] := value
+    value >>= 1
+    outa[pinCLK]~~
+
+PRI read_32_slow : r
+  repeat 4
+    r <<= 8
+    r |= read_slow
+  
+PRI read_slow : r
+{{
+  Read back 8 bits from the card
+}}
+  ' we need the DI line high so a read can occur
+  outa[pinDI]~~
+  ' get 8 bits (remember, r is initialized to 0 by SPIN)
+  repeat 8
+    outa[pinCLK]~
+    outa[pinCLK]~~
+    r += r + ina[pinDO]
+  ' error check
+  if( (cnt - SPI_block_index) > (clkfreq << 2) )
+    crash( ERR_CARD_BUSY_TIMEOUT )
+   
+DAT
+{{
+        This is the assembly engine for doing fast block
+        reads and writes.  This is *ALL* it does!
+}}
+ORG 0
+SPI_engine_entry
+        ' Counter A drives data out
+        mov ctra,writeMode
+        ' Counter B will always drive my clock line
+        mov ctrb,clockLineMode
+        ' set our output pins to match the pin mask
+        mov dira,maskAll
+        ' handshake that we now control the pins
+        neg user_request,#1
+        wrlong user_request,par
+        ' start my seconds' counter here
+        mov last_time,cnt
+        
+waiting_for_command
+        ' update my seconds counter, but also track the idle 
+        ' time so we can to release the card after timeout.
+        call #handle_time
+        ' read the command, and make sure it's from the user (> 0)
+        rdlong user_request,par
+        cmps user_request,#0 wz,wc
+if_be   jmp #waiting_for_command
+        ' handle our card based commands
+        cmp user_request,#"r" wz
+if_z    jmp #read_ahead
+        cmp user_request,#"w" wz
+if_z    jmp #write_behind
+        cmp user_request,#"z" wz
+if_z    jmp #release_card
+        ' time requests are handled differently
+        cmp user_request,#"t" wz    ' time
+if_z    wrlong seconds,sdAdr    ' seconds goes into the SD index register
+if_z    wrlong dtime,bufAdr     ' the remainder goes into the buffer address register
+        ' in all other cases, clear the user's request
+        mov user_request,#0
+        wrlong user_request,par
+        jmp #waiting_for_command
+       
+
+release_card
+        mov user_cmd,#"z"       ' request a release 
+        neg lastIndexPlus,#1    ' reset the last block index 
+        neg user_idx,#1         ' and make this match it 
+        call #handle_command
+        mov user_request,user_cmd
+        wrlong user_request,par
+        jmp #waiting_for_command
+
+read_ahead
+        rdlong user_idx,sdAdr
+        ' if the correct block is not already loaded, load it
+        mov tmp1,user_idx
+        add tmp1,#1
+        cmp tmp1,lastIndexPlus wz
+if_z    cmp lastCommand,#"r" wz
+if_z    jmp #:get_on_with_it
+        mov user_cmd,#"r"
+        call #handle_command
+:get_on_with_it
+        ' copy the data up into Hub RAM
+        movi transfer_long,#%000010_000 'set to wrlong
+        call #hub_cog_transfer
+        ' signify that the data is ready, Spin can continue
+        mov user_request,user_cmd
+        wrlong user_request,par
+        ' request the next block
+        mov user_cmd,#"r"
+        add user_idx,#1
+        call #handle_command
+        ' done
+        jmp #waiting_for_command
+
+write_behind
+        rdlong user_idx,sdAdr
+        ' copy data in from Hub RAM
+        movi transfer_long,#%000010_001 'set to rdlong
+        call #hub_cog_transfer
+        ' signify that we have the data, Spin can continue
+        mov user_request,user_cmd
+        wrlong user_request,par
+        ' write out the block
+        mov user_cmd,#"w"
+        call #handle_command
+        ' done                      
+        jmp #waiting_for_command
+
+{{
+  Set user_cmd and user_idx before calling this
+}}
+handle_command
+        ' Can we stay in the old mode? (address = old_address+1) && (old mode == new_mode)
+        cmp lastIndexPlus,user_idx wz
+if_z    cmp user_cmd,lastCommand wz
+if_z    jmp #:execute_block_command
+        ' we fell through, must exit the old mode! (except if the old mode was "release")
+        cmp lastCommand,#"w" wz
+if_z    call #stop_mb_write
+        cmp lastCommand,#"r" wz  
+if_z    call #stop_mb_read
+        ' and start up the new mode!
+        cmp user_cmd,#"w" wz
+if_z    call #start_mb_write
+        cmp user_cmd,#"r" wz
+if_z    call #start_mb_read
+        cmp user_cmd,#"z" wz
+if_z    call #release_DO
+:execute_block_command
+        ' track the (new) last index and command
+        mov lastIndexPlus,user_idx
+        add lastIndexPlus,#1
+        mov lastCommand,user_cmd
+        ' do the block read or write or terminate!
+        cmp user_cmd,#"w" wz
+if_z    call #write_single_block
+        cmp user_cmd,#"r" wz
+if_z    call #read_single_block
+        cmp user_cmd,#"z" wz
+if_z    mov user_cmd,#0
+        ' done
+handle_command_ret
+        ret   
+
+{=== these PASM functions get me in and out of multiblock mode ===}
+release_DO
+        ' we're already out of multiblock mode, so
+        ' deselect the card and send out some clocks
+        or outa,maskCS
+        call #in8
+        call #in8
+        ' if you are using pull-up resistors, and need all
+        ' lines tristated, then uncomment the following line.
+        ' for Cluso99
+        'mov dira,#0
+release_DO_ret
+        ret
+        
+start_mb_read  
+        movi block_cmd,#CMD18<<1
+        call #send_SPI_command_fast       
+start_mb_read_ret
+        ret
+
+stop_mb_read
+        movi block_cmd,#CMD12<<1
+        call #send_SPI_command_fast
+        call #busy_fast
+stop_mb_read_ret
+        ret
+
+start_mb_write  
+        movi block_cmd,#CMD25<<1
+        call #send_SPI_command_fast
+start_mb_write_ret
+        ret
+
+stop_mb_write
+        call #busy_fast
+        ' only some cards need these extra clocks
+        mov tmp1,#16
+:loopity
+        call #in8         
+        djnz tmp1,#:loopity
+        ' done with hack
+        movi phsa,#$FD<<1
+        call #out8
+        call #in8       ' stuff byte
+        call #busy_fast
+stop_mb_write_ret
+        ret
+
+send_SPI_command_fast
+        ' make sure we have control of the output lines
+        mov dira,maskAll
+        ' make sure the CS line transitions low
+        or outa,maskCS  
+        andn outa,maskCS
+        ' 8 clocks
+        call #in8 
+        ' send the data
+        mov phsa,block_cmd                      ' do which ever block command this is (already in the top 8 bits)
+        call #out8                               ' write the byte
+        mov phsa,user_idx                       ' read in the desired block index
+        shl phsa,adrShift                       ' this will multiply by 512 (bytes/sector) for MMC and SD
+        call #out8                               ' move out the 1st MSB                              '
+        rol phsa,#1
+        call #out8                               ' move out the 1st MSB                              '
+        rol phsa,#1
+        call #out8                               ' move out the 1st MSB                              '
+        rol phsa,#1
+        call #out8                               ' move out the 1st MSB                              '
+        ' bogus CRC value
+        call #in8                                ' in8 looks like out8 with $FF
+        ' CMD12 requires a stuff byte
+        shr block_cmd,#24
+        cmp block_cmd,#CMD12 wz
+if_z    call #in8                               ' 8 clocks
+        ' get the response
+        mov tmp1,#9
+:cmd_response
+        call #in8
+        test readback,#$80 wc,wz
+if_c    djnz tmp1,#:cmd_response
+if_nz   neg user_cmd,readback
+        ' done        
+send_SPI_command_fast_ret
+        ret    
+                        
+        
+busy_fast
+        mov tmp1,N_in8_500ms
+:still_busy
+        call #in8
+        cmp readback,#$FF wz
+if_nz   djnz tmp1,#:still_busy
+busy_fast_ret
+        ret
+
+
+out8
+        andn outa,maskDI 
+        'movi phsb,#%11_0000000
+        mov phsb,#0
+        movi frqb,#%01_0000000        
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        mov frqb,#0
+        ' don't shift out the final bit...already sent, but be aware 
+        ' of this when sending consecutive bytes (send_cmd, for e.g.) 
+out8_ret
+        ret
+
+{
+in8
+        or outa,maskDI
+        mov ctra,readMode
+        ' Start my clock
+        mov frqa,#1<<7
+        mov phsa,#0
+        movi phsb,#%11_0000000
+        movi frqb,#%01_0000000
+        ' keep reading in my value, one bit at a time!  (Kuneko - "Wh)
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        mov frqb,#0 ' stop the clock
+        mov readback,phsa
+        mov frqa,#0
+        mov ctra,writeMode
+in8_ret
+        ret
+}
+in8
+        neg phsa,#1' DI high
+        mov readback,#0
+        ' set up my clock, and start it
+        movi phsb,#%011_000000
+        movi frqb,#%001_000000
+        ' keep reading in my value
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        mov frqb,#0 ' stop the clock
+        rcl readback,#1
+        mov phsa,#0 'DI low
+in8_ret
+        ret
+        
+        
+' this is called more frequently than 1 Hz, and
+' is only called when the user command is 0.
+handle_time        
+        mov tmp1,cnt            ' get the current timestamp
+        add idle_time,tmp1      ' add the current time to my idle time counter
+        sub idle_time,last_time ' subtract the last time from my idle counter (hence delta)    
+        add dtime,tmp1          ' add to my accumulator, 
+        sub dtime,last_time     ' and subtract the old (adding delta)
+        mov last_time,tmp1      ' update my "last timestamp"        
+        rdlong tmp1,#0          ' what is the clock frequency?
+        cmpsub dtime,tmp1 wc    ' if I have more than a second in my accumulator
+        addx seconds,#0         ' then add it to "seconds"
+        ' this part is to auto-release the card after a timeout
+        cmp idle_time,idle_limit wz,wc
+if_b    jmp #handle_time_ret    ' don't clear if we haven't hit the limit
+        mov user_cmd,#"z"       ' we can't overdo it, the command handler makes sure
+        neg lastIndexPlus,#1    ' reset the last block index 
+        neg user_idx,#1         ' and make this match it 
+        call #handle_command    ' release the card, but don't mess with the user's request register
+handle_time_ret
+        ret
+
+hub_cog_transfer
+' setup for all 4 passes        
+        mov ctrb,clockXferMode
+        mov frqb,#1 
+        rdlong buf_ptr,bufAdr
+        mov ops_left,#4
+        movd transfer_long,#speed_buf
+four_transfer_passes
+        ' sync to the Hub RAM access
+        rdlong tmp1,tmp1
+        ' how many long to move on this pass? (512 bytes / 4)longs / 4 passes
+        mov tmp1,#(512 / 4 / 4)
+        ' get my starting address right (phsb is incremented 1 per clock, so 16 each Hub access)
+        mov phsb,buf_ptr
+        ' write the longs, stride 4...low 2 bits of phsb are ignored
+transfer_long
+        rdlong 0-0,phsb
+        add transfer_long,incDest4
+        djnz tmp1,#transfer_long
+        ' go back to where I started, but advanced 1 long
+        sub transfer_long,decDestNminus1
+        ' offset my Hub pointer by one long per pass
+        add buf_ptr,#4
+        ' do all 4 passes
+        djnz ops_left,#four_transfer_passes
+        ' restore the counter mode
+        mov frqb,#0
+        mov phsb,#0
+        mov ctrb,clockLineMode
+hub_cog_transfer_ret
+        ret
+        
+
+read_single_block
+        ' where am I sending the data?
+        movd :store_read_long,#speed_buf
+        mov ops_left,#128
+        ' wait until the card is ready
+        mov tmp1,N_in8_500ms
+:get_resp
+        call #in8
+        cmp readback,#$FE wz        
+if_nz   djnz tmp1,#:get_resp
+if_nz   neg user_cmd,#ERR_ASM_NO_READ_TOKEN  
+if_nz   jmp #read_single_block_ret
+        ' set DI high
+        neg phsa,#1
+        ' read the data
+        mov ops_left,#128
+:read_loop        
+        mov tmp1,#4
+        movi phsb,#%011_000000
+:in_byte        
+        ' Start my clock
+        movi frqb,#%001_000000
+        ' keep reading in my value, BACKWARDS!  (Brilliant idea by Tom Rokicki!)
+        test maskDO,ina wc
+        rcl readback,#8
+        test maskDO,ina wc
+        muxc readback,#2
+        test maskDO,ina wc
+        muxc readback,#4
+        test maskDO,ina wc
+        muxc readback,#8
+        test maskDO,ina wc
+        muxc readback,#16
+        test maskDO,ina wc
+        muxc readback,#32
+        test maskDO,ina wc
+        muxc readback,#64
+        test maskDO,ina wc
+        mov frqb,#0 ' stop the clock
+        muxc readback,#128
+        ' go back for more
+        djnz tmp1,#:in_byte
+        ' make it...NOT backwards [8^)
+        rev readback,#0
+:store_read_long
+        mov 0-0,readback       ' due to some counter weirdness, we need this mov
+        add :store_read_long,const512
+        djnz ops_left,#:read_loop
+
+        ' set DI low
+        mov phsa,#0
+        
+        ' now read 2 trailing bytes (CRC)
+        call #in8      ' out8 is 2x faster than in8
+        call #in8      ' and I'm not using the CRC anyway
+        ' give an extra 8 clocks in case we pause for a long time
+        call #in8       ' in8 looks like out8($FF)
+        
+        ' all done successfully
+        mov idle_time,#0
+        mov user_cmd,#0               
+read_single_block_ret
+        ret          
+        
+write_single_block               
+        ' where am I getting the data? (all 512 bytes / 128 longs of it?)
+        movs :write_loop,#speed_buf
+        ' read in 512 bytes (128 longs) from Hub RAM and write it to the card
+        mov ops_left,#128        
+        ' just hold your horses  
+        call #busy_fast 
+        ' $FC for multiblock, $FE for single block
+        movi phsa,#$FC<<1
+        call #out8
+        mov phsb,#0             ' make sure my clock accumulator is right
+        'movi phsb,#%11_0000000
+:write_loop
+        ' read 4 bytes
+        mov phsa,speed_buf
+        add :write_loop,#1
+        ' a long in LE order is DCBA
+        rol phsa,#24            ' move A7 into position, so I can do the swizzled version
+        movi frqb,#%010000000   ' start the clock (remember A7 is already in place)
+        rol phsa,#1             ' A7 is going out, at the end of this instr, A6 is in place
+        rol phsa,#1             ' A5
+        rol phsa,#1             ' A4
+        rol phsa,#1             ' A3
+        rol phsa,#1             ' A2
+        rol phsa,#1             ' A1
+        rol phsa,#1             ' A0
+        rol phsa,#17            ' B7
+        rol phsa,#1             ' B6
+        rol phsa,#1             ' B5
+        rol phsa,#1             ' B4
+        rol phsa,#1             ' B3
+        rol phsa,#1             ' B2
+        rol phsa,#1             ' B1
+        rol phsa,#1             ' B0
+        rol phsa,#17            ' C7
+        rol phsa,#1             ' C6
+        rol phsa,#1             ' C5
+        rol phsa,#1             ' C4
+        rol phsa,#1             ' C3
+        rol phsa,#1             ' C2
+        rol phsa,#1             ' C1
+        rol phsa,#1             ' C0
+        rol phsa,#17            ' D7
+        rol phsa,#1             ' D6
+        rol phsa,#1             ' D5
+        rol phsa,#1             ' D4
+        rol phsa,#1             ' D3
+        rol phsa,#1             ' D2
+        rol phsa,#1             ' D1
+        rol phsa,#1             ' D0 will be in place _after_ this instruction
+        mov frqb,#0             ' shuts the clock off, _after_ this instruction
+        djnz ops_left,#:write_loop
+        ' write out my two (bogus, using $FF) CRC bytes
+        call #in8
+        call #in8
+        ' now read response (I need this response, so can't spoof using out8)
+        call #in8
+        and readback,#$1F
+        cmp readback,#5 wz
+if_z    mov user_cmd,#0 ' great
+if_nz   neg user_cmd,#ERR_ASM_BLOCK_NOT_WRITTEN ' oops
+        ' send out another 8 clocks
+        call #in8 
+        ' all done
+        mov idle_time,#0
+write_single_block_ret
+        ret
+
+        
+{=== Assembly Interface Variables ===}
+pinDO         long 0    ' pin is controlled by a counter
+pinCLK        long 0    ' pin is controlled by a counter
+pinDI         long 0    ' pin is controlled by a counter
+maskDO        long 0    ' mask for reading the DO line from the card
+maskDI        long 0    ' mask for setting the pin high while reading  
+maskCS        long 0    ' mask = (1<<pin), and is controlled directly
+maskAll       long 0
+adrShift      long 9    ' will be 0 for SDHC, 9 for MMC & SD
+bufAdr        long 0    ' where in Hub RAM is the buffer to copy to/from?
+sdAdr         long 0    ' where on the SD card does it read/write?
+writeMode     long 0    ' the counter setup in NCO single ended, clocking data out on pinDI
+'clockOutMode  long 0    ' the counter setup in NCO single ended, driving the clock line on pinCLK
+N_in8_500ms   long 1_000_000 ' used for timeout checking in PASM
+'readMode      long 0
+clockLineMode long 0
+clockXferMode long %11111 << 26
+const512      long 512
+const1024     long 1024
+incDest4      long 4 << 9
+decDestNminus1 long (512 / 4 - 1) << 9         
+
+{=== Initialized PASM Variables ===}
+seconds       long 0
+dtime         long 0
+idle_time     long 0
+idle_limit    long 0
+
+{=== Multiblock State Machine ===}
+lastIndexPlus long -1   ' state handler will check against lastIndexPlus, which will not have been -1
+lastCommand   long 0    ' this will never be the last command.
+
+{=== Debug Logging Pointers ===}
+{
+dbg_ptr       long 0
+dbg_end       long 0
+'}
+
+{=== Assembly Scratch Variables ===}
+ops_left      res 1     ' used as a counter for bytes, words, longs, whatever (start w/ # byte clocks out)
+readback      res 1     ' all reading from the card goes through here
+tmp1          res 1     ' this may get used in all subroutines...don't use except in lowest 
+user_request  res 1     ' the main command variable, read in from Hub: "r"-read single, "w"-write single
+user_cmd      res 1     ' used internally to handle actual commands to be executed
+user_idx      res 1     ' the pointer to the Hub RAM where the data block is/goes
+block_cmd     res 1     ' one of the SD/MMC command codes, no app-specific allowed
+buf_ptr       res 1     ' moving pointer to the Hub RAM buffer
+last_time     res 1     ' tracking the timestamp
+
+{{
+  496 longs is my total available space in the cog,
+  and I want 128 longs for eventual use as one 512-
+  byte buffer.   This gives me a total of 368 longs
+  to use for umount, and a readblock and writeblock
+  for both Hub RAM and Cog buffers.
+}}
+speed_buf     res 128   ' 512 bytes to be used for read-ahead / write-behind
+
+'fit 467
+FIT 496
+
+''      MIT LICENSE
+{{
+'  Permission is hereby granted, free of charge, to any person obtaining
+'  a copy of this software and associated documentation files
+'  (the "Software"), to deal in the Software without restriction,
+'  including without limitation the rights to use, copy, modify, merge,
+'  publish, distribute, sublicense, and/or sell copies of the Software,
+'  and to permit persons to whom the Software is furnished to do so,
+'  subject to the following conditions:
+'
+'  The above copyright notice and this permission notice shall be included
+'  in all copies or substantial portions of the Software.
+'
+'  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+'  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+'  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+'  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+'  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+'  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+'  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+}}

Hardware/PropIO2/Spin/E555_SPKEngine.spin

@@ -0,0 +1 @@
+{{

Hardware/PropIO2/Spin/VGA_1024.spin

@@ -0,0 +1,704 @@
+'' VGA_1024.spin
+''
+'' MODIFIED BY VINCE BRIEL FOR POCKETERM FEATURES
+'' MODIIFED BY JEFF LEDGER / AKA OLDBITCOLLECTOR
+''
+
+CON
+  cols          = 80 '128                               ' number of screen columns
+  lcols         = cols / 4                              ' number of long in columns
+  rows          = 40 '64                                ' number of screen rows
+  chars         = rows*cols                             ' number of screen characters
+  esc           = $CB                                   ' keyboard esc char
+  rowsnow       = 36                                    ' adjusted for split screen effect
+  maxChars      = rowsnow*cols                          ' adjusted value for split screen effect
+  lastChar      = maxChars / 4                          ' last screen position in longs adjusted for split
+  lastLine      = (rowsnow - 1) * cols                  ' character position of last row
+  cols1         = 81                                    ' adjusted value for 80th character
+  TURQUOISE     = $29
+
+OBJ
+  vga : "vga_Hires_Text"
+
+VAR
+  byte  screen[chars]           ' screen character buffer
+  byte  tmpl[cols]              ' temporary line buffer
+  word  colors[rows]            ' color specs for each screen row (see ColorPtr description above)
+  byte  cursor[6]               ' cursor info array (see CursorPtr description above)
+  long  sync, loc, xloc, yloc   ' sync used by VGA routine, others are local screen pointers
+  long  kbdreq                  ' global val of kbdflag
+  long  BR[8]
+  long  Brate
+  byte  inverse
+  byte  invs
+  byte  state                   ' Current state of state machine
+  word  pos                     ' Current Position on the screen
+  word  oldpos                  ' Previous location of cursor before update
+  word  regionTop, regionBot    ' Scroll region top/bottom
+  long  arg0                    ' First argument of escape sequence
+  long  arg1                    ' Second argument of escape sequence
+  byte  lastc                   ' Last displayed char
+  word  statpos
+  long  vgabasepin
+  
+PUB start(BasePin) | i, char
+  vgabasepin := BasePin
+
+''init screen colors to gold on blue
+  repeat i from 0 to rows - 1
+    colors[i] := $08F0          '$2804 (if you want cyan on blue)
+
+''init cursor attributes
+  cursor[2] := %110             ' init cursor to underscore with slow blink
+  BR[0]:=300 
+  BR[1]:=1200
+  BR[2]:=2400
+  BR[3]:=4800
+  BR[4]:=9600
+  BR[5]:=19200
+  BR[6]:=38400
+  BR[7]:=57600
+  BR[8]:=115200
+  xloc := cursor[0] := 0
+  yloc := cursor[1] := 0
+  loc  := xloc + yloc*cols
+  
+  pos := 0
+  regionTop := 0
+  regionBot := 35 * cols
+  state := 0
+  statpos := 37 * cols
+
+PUB vidon
+  if (!vga.start(vgabasepin, @screen, @colors, @cursor, @sync))
+    return false
+  
+  waitcnt(clkfreq * 1 + cnt)    'wait 1 second for cogs to start
+
+
+PUB vidoff
+  vga.stop
+
+  
+PUB inv(c)
+  inverse:=c
+
+PUB color(colorVal) | i
+  repeat i from 0 to rows - 1
+    colors[i] := $0000 | colorVal
+
+PUB cursorset(c) | i
+  i:=%000
+  if c == 1
+    i:= %001
+  if c == 2
+    i:= %010
+  if c == 3
+    i:= %011
+  if c == 4
+    i:= %101
+  if c == 5
+    i:= %110
+  if c == 6
+    i:= %111
+  if c == 7
+    i:= %000  
+  cursor[2] := i
+  
+PUB bin(value, digits)
+
+'' Print a binary number, specify number of digits
+
+  repeat while digits > 32
+    outc("0")
+    digits--
+
+  value <<= 32 - digits
+
+  repeat digits
+    outc((value <-= 1) & 1 + "0")
+
+
+PUB clrbtm(ColorVal) | i
+   repeat i from 36 to rows - 1                         'was 35
+    colors[i] := $0000 + ColorVal
+
+PUB cls1(c,screencolor,pcport,ascii,CR) | i,x,y
+
+  longfill(@screen[0], $20202020, chars / 4)
+
+  clrbtm(TURQUOISE)
+  
+  inverse := 1
+
+  statprint(36,0, string("                          N8VEM PropIO V2 | RomWBW                         v0.94"))
+  inverse := 0
+  statprint(37,0, string("                                                                                "))
+  statprint(38,0, string("                                                                                "))
+  statprint(39,0, string("                                                                                "))
+
+ 
+{{
+  x :=xloc
+  y := yloc
+  invs := inverse
+  ''clrbtm(TURQUOISE)
+  longfill(@screen, $20202020, chars/4)
+  xloc := 0
+  yloc :=0
+  loc  := xloc + yloc*cols
+  repeat 80
+     outc(32)
+  xloc := 0
+  yloc :=36
+  loc  := xloc + yloc*cols
+  inverse := 1
+  str(string("                                    propIO  V 0.91                              "))
+  inverse := 0
+  str(string("Baud Rate: "))
+  i:= BR[6]
+  dec(i)
+  str(string("   "))
+  xloc := 18
+  loc := xloc + yloc*cols
+  str(string("Color  "))
+  str(string("PC Port: "))
+  if pcport == 1
+     str(string("OFF "))
+  if pcport == 0
+     str(string("ON  "))   
+  str(string(" Force 7 bit: "))
+  if ascii == 0
+     str(string("NO  "))
+  if ascii == 1
+     str(string("YES "))
+  str(string(" Cursor   CR W/LF: "))
+  if CR == 1
+     str(string("YES"))
+  if CR == 0
+     str(string("NO "))  
+  outc(13)
+  outc(10)
+  
+  inverse:=1
+  xloc := 6
+  loc  := xloc + yloc*cols
+  str(string("F1"))
+  xloc := 19
+  loc  := xloc + yloc*cols
+  str(string("F2"))
+  xloc := 30
+  loc  := xloc + yloc*cols
+  str(string("F3"))
+  xloc := 46
+  loc  := xloc + yloc*cols
+  str(string("F4"))
+  xloc := 58
+  loc  := xloc + yloc*cols
+  str(string("F5"))
+  xloc := 70
+  loc  := xloc + yloc*cols
+  str(string("F6")) 
+  inverse := invs
+  xloc := cursor[0] := x 'right & left       was 0
+  yloc := cursor[1] := y 'from top           was 1
+  loc  := xloc + yloc*cols
+}}
+
+PUB clsupdate(c,screencolor,PCPORT,ascii,CR) | i,x,y,locold
+        
+  invs := inverse
+  locold := loc
+  x := xloc
+  y := yloc
+  ''(TURQUOISE)
+  xloc := 0
+  yloc :=36
+  loc  := xloc + yloc*cols
+  inverse := 1
+  str(string("                                    propIO  V 0.81                              "))
+  inverse := 0
+  xloc := 0
+  yloc :=37
+  loc  := xloc + yloc*cols
+  str(string("Baud Rate: "))
+  i:= BR[6]
+  dec(i)
+  str(string("   "))
+  xloc := 18
+  loc := xloc + yloc*cols
+  
+  str(string("Color  "))
+  str(string("PC Port: "))
+  if pcport == 1
+     str(string("OFF "))
+  if pcport == 0
+     str(string("ON  "))   
+  str(string(" Force 7 bit: "))
+  if ascii == 0
+     str(string("NO  "))
+  if ascii == 1
+     str(string("YES "))
+  str(string(" Cursor   CR W/LF: "))
+  if CR == 1
+     str(string("YES"))
+  if CR == 0
+     str(string("NO "))  
+  xloc := 0
+  yloc :=38
+  loc  := xloc + yloc*cols
+  inverse:=1
+  xloc := 6
+  loc  := xloc + yloc*cols
+  str(string("F1"))
+  xloc := 19
+  loc  := xloc + yloc*cols
+  str(string("F2"))
+  xloc := 30
+  loc  := xloc + yloc*cols
+  str(string("F3"))
+  xloc := 46
+  loc  := xloc + yloc*cols
+  str(string("F4"))
+  xloc := 58
+  loc  := xloc + yloc*cols
+  str(string("F5"))
+  xloc := 70
+  loc  := xloc + yloc*cols
+  str(string("F6")) 
+  inverse := invs
+  xloc := cursor[0] := x
+  yloc := cursor[1] := y
+'  loc  := xloc + yloc*cols
+  loc := locold
+
+PUB dec(value) | i
+
+'' Print a decimal number
+
+  if value < 0
+    -value
+    outc("-")
+
+  i := 1_000_000_000
+
+  repeat 10
+    if value => i
+      outc(value/i + "0")
+      value //= i
+      result~~
+    elseif result or i == 1
+      outc("0")
+    i /= 10     
+
+PUB hex(value, digits)
+
+'' Print a hexadecimal number, specify number of digits
+
+  repeat while digits > 8
+    outc("0")
+    digits--
+
+  value <<= (8 - digits) << 2
+
+  repeat digits
+    outc(lookupz((value <-= 4) & $f : "0".."9", "A".."F"))
+
+
+PUB str(string_ptr)
+
+'' Print a zero terminated string
+
+  repeat strsize(string_ptr)
+    process_char(byte[string_ptr++])
+
+PUB statprint(r, c, str1) | x, ptr
+ 
+  ptr := r * cols + c
+  repeat x from 0 to STRSIZE(str1) - 1
+    putc(ptr++, BYTE[str1 + x])
+
+PUB statnum(r, c, num1)  | i, ptr
+
+  ptr := r * cols + c
+
+  if num1 < 0
+    -num1
+    putc(ptr++,"-")
+
+  i := 1_000_000_000
+
+  repeat 10
+    if num1 => i
+      putc(ptr++, (num1/i +"0"))
+      num1 //= i
+      result~~
+    elseif result or i == 1
+      putc(ptr++, "0")
+    i /= 10
+
+PUB putc(position, c)
+  if inverse
+    c |= $80
+  screen[position] := c
+  
+PUB cls
+  longfill (@screen, $20202020, lastChar)
+
+PUB fullcls
+  longfill(@screen, $20202020, 800)
+
+PUB setInverse(val)
+  inverse := val
+
+PUB setInv(c)
+  if c == 7
+    setInverse(1)
+  else
+    setInverse(0)
+  
+PUB clEOL(position) | count
+  count := cols - (position // cols)
+  bytefill(@screen + position, $20, count)
+
+PUB clBOL(position) | count
+  count := position // cols
+  bytefill(@screen + position - count, $20, count)
+
+PUB delLine(position) | src, count
+  position -= position // cols
+
+  src := position + cols
+
+  count := (maxChars - src) / 4
+
+  if count > 0
+    longmove(@screen + position, @screen + src, count)
+
+  longfill(@screen + lastLine, $20202020, lcols)
+
+PUB clEOS(position)
+  cleol(position)
+  position += cols - (position // cols)
+  repeat while position < maxChars
+    longfill(@screen + position, $20202020, lcols)
+    pos += cols
+
+PUB setCursorPos(position)
+  cursor[0] := position // cols
+  cursor[1] := position / cols
+
+PUB insLine(position) | base, nxt
+  base := position - (position // cols)
+  position := lastLine
+  repeat while position > base
+    nxt := position - cols
+    longmove(@screen + position, @screen + nxt, lcols)
+    position := nxt
+  clEOL(base)
+
+PUB insChar(position) | count
+  count := (cols - (position // cols)) - 1
+  bytemove(@tmpl, @screen + position, count)
+  screen[position] := " "
+  bytemove(@screen + position + 1, @tmpl, count)
+
+PUB delChar(position) | count
+  count := (cols - (position // cols)) - 1
+  bytemove(@screen + position, @screen + position + 1, count)
+  screen[position + count] := " "
+
+PRI inRegion : answer
+  answer := (pos => regionTop) AND (pos < regionBot)
+
+PRI scrollUp
+  delLine(regionTop)
+  if regionBot < maxChars
+    insLine(regionBot)
+
+PRI scrollDown
+  if regionBot < maxChars
+    delLine(regionBot)
+  insLine(regionTop)
+
+PRI ansi(c) | x, defVal
+
+  state := 0
+
+  if (c <> "r") AND (c <> "J") AND (c <> "m") AND (c <> "K")
+      if arg0 == -1
+          arg0 := 1
+      if arg1 == -1
+          arg1 := 1
+
+  case c
+    "@":
+      repeat while arg0-- > 0
+        insChar(pos)
+
+    "b":
+      repeat while arg0-- > 0
+        outc(lastc)
+
+    "d":
+      if (arg0 < 1) OR (arg0 > rows)
+        arg0 := rows
+      pos := ((arg0 - 1) * cols) + (pos // cols)
+
+    "m":
+      setInv(arg0)
+      if arg1 <> -1
+        setInv(arg1)
+
+    "r":
+      if arg0 < 1
+        arg0 := 1
+      elseif arg0 > cols
+        arg0 := cols
+      if arg1 < 1
+        arg1 := 1
+      elseif arg1 > cols
+        arg1 := cols
+      if arg1 < arg0
+        arg1 := arg0
+
+      regionTop := (arg0 - 1) * cols
+      regionBot := arg1 * cols
+      pos := 0
+
+    "A":
+      repeat while arg0-- > 0
+        pos -= cols
+        if pos < 0
+          pos += cols
+          return
+
+    "B":
+      repeat while arg0-- > 0
+        pos += cols
+        if pos => maxChars
+          pos -= cols
+          return
+
+    "C":
+      repeat while arg0-- > 0
+        pos += 1
+        if pos => maxChars
+          pos -= 1
+          return
+
+    "D":
+      repeat while arg0-- > 0
+        pos -= 1
+        if pos < 0
+          pos := 0
+          return
+
+    "G":
+      if (arg0 < 1) OR (arg0 > cols)
+        arg0 := cols
+     pos := (pos - (pos // cols)) + (arg0 - 1)
+
+    "H", "f":
+      if arg0 =< 0
+        arg0 := 1
+      if arg1 =< 0
+        arg1 := 1
+      pos := (cols * (arg0 - 1)) + (arg1 - 1)
+      if pos < 0
+        pos := 0
+      if pos => maxChars
+        pos := maxChars - 1
+
+    "J":
+      if arg0 == 1
+        clBOL(pos)
+        x := pos - cols
+        x -= x // cols
+        repeat while x => 0
+          clEOL(x)
+          x -= cols
+        return
+
+      if arg0 == 2
+        pos := 0
+
+      clEOL(pos)
+      x := pos + cols
+      x -= (x // cols)
+      repeat while x < maxChars
+        clEOL(x)
+        x += cols
+
+    "K":
+      if arg0 == -1
+          clEOL(pos)
+      elseif arg0 == 1
+          clBOL(pos)
+      else
+          clEOL(pos - (pos // cols))
+
+    "L":
+      if inRegion
+        repeat while arg0-- > 0
+          if regionBot < maxChars
+            delLine(regionBot)
+          insLine(pos)
+
+    "M":
+      if inRegion
+        repeat while arg0-- > 0
+          delLine(pos)
+          if regionBot < maxChars
+            insLine(regionBot)            
+
+    "P":
+      repeat while arg0--
+        delChar(pos)
+
+PRI outc(c)
+
+  putc(pos++, lastc := c)  
+  if pos == regionBot
+    scrollUp
+    pos -= cols
+  elseif pos == maxChars
+    pos := lastLine
+    
+PUB process_char(c)
+  
+  case state
+
+    0:
+      if c > 127
+        c := $20
+
+      if c => $20
+        outc(c)
+        setCursorPos(pos)
+        return
+
+      if c == $1B
+        state := 1
+        return
+
+      if c == $0D
+        pos := pos - (pos // cols)
+        setCursorPos(pos)
+        return
+
+      if c == $0A
+        if inRegion
+            pos += cols
+            if pos => regionBot
+               scrollUp
+               pos -= cols
+        else
+          pos += cols
+          if pos => maxChars
+            pos -= cols
+        setCursorPos(pos)
+        return
+
+      if c == 9
+        pos += (8 - (pos // 8))
+
+        if pos => maxChars
+         pos := lastLine
+         delLine(0)
+
+        setCursorPos(pos)
+       return
+
+     if c == 8
+       if pos > 0
+         pos -= 1
+       setCursorPos(pos)
+      return
+
+    1:
+      case c
+          "[":
+              arg0 := arg1 := -1
+              state := 2
+              return
+
+          "P":
+              pos += cols
+              if pos => maxChars
+                  pos -= cols
+
+          "K":
+              if pos > 0
+                  pos -= 1
+
+          "H":
+              pos -= cols
+              if pos < 0
+                  pos += cols
+
+          "D":
+              if inRegion
+                  scrollUp
+
+          "M":
+              if inRegion
+                  scrollDown
+
+          "G":
+              pos := 0
+
+          "(":
+              state := 5
+              return
+
+      state := 0
+      return
+
+   2:
+      if (c => "0") AND (c =< "9")
+          if arg0 == -1
+              arg0 := c - "0"
+          else
+              arg0 := (arg0 * 10) + (c - "0")
+          return
+
+      if c == ";"
+          state := 3
+          return
+
+      ansi(c)
+      setCursorPos(pos)
+      return
+
+   3:
+      if (c => "0") AND (c =< "9")
+          if arg1 == -1
+              arg1 := c - "0"
+          else
+              arg1 := (arg1 * 10) + (c - "0")
+          return
+
+      if c == ";"
+          state := 4
+          return
+
+      ansi(c)
+      setCursorPos(pos)
+      return
+
+   4:
+      if (c => "0") AND (c =< "9")
+          return
+
+      if c == ";"
+          return
+      ansi(c)
+      setCursorPos(pos)
+      return
+
+   5:
+    state := 0
+    return
+
+  return

Hardware/PropIO2/Spin/safe_spi.spin

@@ -0,0 +1,920 @@
+{{
+  SPI interface routines for SD & SDHC & MMC cards
+
+  Jonathan "lonesock" Dummer
+  version 0.3.0  2009 July 19
+
+  Using multiblock SPI mode exclusively.
+
+  This is the "SAFE" version...uses
+  * 1 instruction per bit writes
+  * 2 instructions per bit reads
+
+  For the fsrw project:
+  fsrw.sf.net
+}}
+
+CON
+  ' possible card types
+  type_MMC      = 1
+  type_SD       = 2
+  type_SDHC     = 3
+  
+  ' Error codes
+  ERR_CARD_NOT_RESET            = -1
+  ERR_3v3_NOT_SUPPORTED         = -2
+  ERR_OCR_FAILED                = -3
+  ERR_BLOCK_NOT_LONG_ALIGNED    = -4
+  '...
+  ' These errors are for the assembly engine...they are negated inside, and need to be <= 511
+  ERR_ASM_NO_READ_TOKEN         = 100
+  ERR_ASM_BLOCK_NOT_WRITTEN     = 101
+  ' NOTE: errors -128 to -255 are reserved for reporting R1 response errors
+  '...
+  ERR_SPI_ENGINE_NOT_RUNNING    = -999
+  ERR_CARD_BUSY_TIMEOUT          = -1000
+
+  ' SDHC/SD/MMC command set for SPI
+  CMD0    = $40+0        ' GO_IDLE_STATE 
+  CMD1    = $40+1        ' SEND_OP_COND (MMC) 
+  ACMD41  = $C0+41       ' SEND_OP_COND (SDC) 
+  CMD8    = $40+8        ' SEND_IF_COND 
+  CMD9    = $40+9        ' SEND_CSD 
+  CMD10   = $40+10       ' SEND_CID 
+  CMD12   = $40+12       ' STOP_TRANSMISSION
+  CMD13   = $40+13       ' SEND_STATUS  
+  ACMD13  = $C0+13       ' SD_STATUS (SDC)
+  CMD16   = $40+16       ' SET_BLOCKLEN 
+  CMD17   = $40+17       ' READ_SINGLE_BLOCK 
+  CMD18   = $40+18       ' READ_MULTIPLE_BLOCK 
+  CMD23   = $40+23       ' SET_BLOCK_COUNT (MMC) 
+  ACMD23  = $C0+23       ' SET_WR_BLK_ERASE_COUNT (SDC)
+  CMD24   = $40+24       ' WRITE_BLOCK 
+  CMD25   = $40+25       ' WRITE_MULTIPLE_BLOCK 
+  CMD55   = $40+55       ' APP_CMD 
+  CMD58   = $40+58       ' READ_OCR
+  CMD59   = $40+59       ' CRC_ON_OFF 
+
+  ' buffer size for my debug cmd log
+  'LOG_SIZE = 256<<1
+
+{
+VAR
+  long SPI_engine_cog
+  ' these are used for interfacing with the assembly engine | temporary initialization usage
+  long SPI_command              ' "t", "r", "w", 0 =>done, <0 => error          | pin mask
+  long SPI_block_index          ' which 512-byte block to read/write            | cnt at init
+  long SPI_buffer_address       ' where to get/put the data in Hub RAM          | unused
+'}
+DAT
+'' I'm placing these variables in a DAT section to make this driver a singleton.
+'' If for some reason you really need more than one driver (e.g. if you have more
+'' than a single SD socket), move these back into VAR.
+SPI_engine_cog          long 0
+' these are used for interfacing with the assembly engine | temporary initialization usage
+SPI_command             long 0  ' "t", "r", "w", 0 =>done, <0 => error          | unused
+SPI_block_index         long 0  ' which 512-byte block to read/write            | cnt at init
+SPI_buffer_address      long 0  ' where to get/put the data in Hub RAM          | unused
+
+{
+VAR
+  ' for debug ONLY
+  byte log_cmd_resp[LOG_SIZE+1]
+PUB get_log_pointer
+  return @log_cmd_resp
+'}
+  
+PUB start( basepin )
+{{
+  This is a compatibility wrapper, and requires that the pins be
+  both consecutive, and in the order DO CLK DI CS.
+}}
+  return start_explicit( basepin, basepin+1, basepin+2, basepin+3 )
+
+PUB readblock( block_index, buffer_address )
+  if SPI_engine_cog == 0
+    abort ERR_SPI_ENGINE_NOT_RUNNING
+  if (buffer_address & 3)
+    abort ERR_BLOCK_NOT_LONG_ALIGNED
+  SPI_block_index := block_index
+  SPI_buffer_address := buffer_address
+  SPI_command := "r"
+  repeat while SPI_command == "r"
+  if SPI_command < 0
+    abort SPI_command
+
+PUB writeblock( block_index, buffer_address )
+  if SPI_engine_cog == 0
+    abort ERR_SPI_ENGINE_NOT_RUNNING
+  if (buffer_address & 3)
+    abort ERR_BLOCK_NOT_LONG_ALIGNED
+  SPI_block_index := block_index
+  SPI_buffer_address := buffer_address
+  SPI_command := "w"
+  repeat while SPI_command == "w"
+  if SPI_command < 0
+    abort SPI_command
+
+PUB get_seconds
+  if SPI_engine_cog == 0
+    abort ERR_SPI_ENGINE_NOT_RUNNING
+  SPI_command := "t"
+  repeat while SPI_command == "t"
+  ' secods are in SPI_block_index, remainder is in SPI_buffer_address
+  return SPI_block_index
+
+PUB get_milliseconds : ms
+  if SPI_engine_cog == 0
+    abort ERR_SPI_ENGINE_NOT_RUNNING
+  SPI_command := "t"
+  repeat while SPI_command == "t"
+  ' secods are in SPI_block_index, remainder is in SPI_buffer_address
+  ms := SPI_block_index * 1000
+  ms += SPI_buffer_address * 1000 / clkfreq
+  
+PUB start_explicit( DO, CLK, DI, CS ) : card_type | tmp, i
+{{
+  Do all of the card initialization in SPIN, then hand off the pin
+  information to the assembly cog for hot SPI block R/W action!
+}}
+  ' Start from scratch
+  stop
+  ' clear my log buffer
+  {
+  bytefill( @log_cmd_resp, 0, LOG_SIZE+1 )
+  dbg_ptr := @log_cmd_resp
+  dbg_end := dbg_ptr + LOG_SIZE
+  '}
+  ' wait ~4 milliseconds
+  waitcnt( 500 + (clkfreq>>8) + cnt )
+  ' (start with cog variables, _BEFORE_ loading the cog)
+  pinDO := DO
+  maskDO := |< DO
+  pinCLK := CLK
+  pinDI := DI
+  maskDI := |< DI
+  maskCS := |< CS
+  adrShift := 9 ' block = 512 * index, and 512 = 1<<9
+  ' pass the output pin mask via the command register
+  maskAll := maskCS | (|<pinCLK) | maskDI
+  dira |= maskAll  
+  ' get the card in a ready state: set DI and CS high, send => 74 clocks
+  outa |= maskAll
+  repeat 4096
+    outa[CLK]~~
+    outa[CLK]~
+  ' time-hack
+  SPI_block_index := cnt
+  ' reset the card
+  tmp~
+  repeat i from 0 to 9
+    if tmp <> 1
+      tmp := send_cmd_slow( CMD0, 0, $95 )
+      if (tmp & 4)
+        ' the card said CMD0 ("go idle") was invalid, so we're possibly stuck in read or write mode
+        if i & 1
+          ' exit multiblock read mode
+          repeat 4
+            read_32_slow        ' these extra clocks are required for some MMC cards
+          send_slow( $FD, 8 )   ' stop token
+          read_32_slow
+          repeat while read_slow <> $FF
+        else
+          ' exit multiblock read mode
+          send_cmd_slow( CMD12, 0, $61 )           
+  if tmp <> 1
+    ' the reset command failed!
+    crash( ERR_CARD_NOT_RESET )
+  ' Is this a SD type 2 card?
+  if send_cmd_slow( CMD8, $1AA, $87 ) == 1
+    ' Type2 SD, check to see if it's a SDHC card
+    tmp := read_32_slow
+  ' check the supported voltage
+    if (tmp & $1FF) <> $1AA
+      crash( ERR_3v3_NOT_SUPPORTED )
+    ' try to initialize the type 2 card with the High Capacity bit
+    repeat while send_cmd_slow( ACMD41, |<30, $77 )
+    ' the card is initialized, let's read back the High Capacity bit
+    if send_cmd_slow( CMD58, 0, $FD ) <> 0
+      crash( ERR_OCR_FAILED )
+    ' get back the data
+    tmp := read_32_slow
+    ' check the bit
+    if tmp & |<30
+      card_type := type_SDHC
+      adrShift := 0
+    else
+      card_type := type_SD
+  else
+    ' Either a type 1 SD card, or it's MMC, try SD 1st
+    if send_cmd_slow( ACMD41, 0, $E5 ) < 2
+      ' this is a type 1 SD card (1 means busy, 0 means done initializing)
+      card_type := type_SD
+      repeat while send_cmd_slow( ACMD41, 0, $E5 )
+    else
+      ' mark that it's MMC, and try to initialize
+      card_type := type_MMC
+      repeat while send_cmd_slow( CMD1, 0, $F9 )
+    ' some SD or MMC cards may have the wrong block size, set it here
+    send_cmd_slow( CMD16, 512, $15 )
+  ' card is mounted, make sure the CRC is turned off
+  send_cmd_slow( CMD59, 0, $91 )
+  '  check the status
+  'send_cmd_slow( CMD13, 0, $0D )    
+  ' done with the SPI bus for now
+  outa |= maskCS
+  ' set my counter modes for super fast SPI operation
+  ' writing: NCO single-ended mode, output on DI
+  writeMode := (%00100 << 26) | (DI << 0)
+  ' reading
+  'readMode := (%11000 << 26) | (DO << 0) | (CLK << 9)
+  ' clock
+  'clockLineMode := (%00110 << 26) | (CLK << 0) ' DUTY, 25% duty cycle
+  ' clock
+  clockLineMode := (%00100 << 26) | (CLK << 0) ' NCO, 50% duty cycle
+  ' how many bytes (8 clocks, >>3) fit into 1/2 of a second (>>1), 4 clocks per instruction (>>2)?
+  N_in8_500ms := clkfreq >> constant(1+2+3)
+  ' how long should we wait before auto-exiting any multiblock mode?
+  idle_limit := 125 ' ms, NEVER make this > 1000
+  idle_limit := clkfreq / (1000 / idle_limit) ' convert to counts
+  ' Hand off control to the assembly engine's cog  
+  bufAdr := @SPI_buffer_address
+  sdAdr := @SPI_block_index
+  SPI_command := 0 ' just make sure it's not 1
+  ' start my driver cog and wait till I hear back that it's done 
+  SPI_engine_cog := cognew( @SPI_engine_entry, @SPI_command ) + 1
+  if( SPI_engine_cog == 0 )
+    crash( ERR_SPI_ENGINE_NOT_RUNNING )
+  repeat while SPI_command <> -1
+  ' and we no longer need to control any pins from here
+  dira &= !maskAll
+  ' the return variable is card_type   
+
+PUB release
+{{
+  I do not want to abort if the cog is not
+  running, as this is called from stop, which
+  is called from start/ [8^)  
+}}
+  if SPI_engine_cog
+    SPI_command := "z"
+    repeat while SPI_command == "z"
+    
+PUB stop
+{{
+  kill the assembly driver cog.
+}}
+  release
+  if SPI_engine_cog
+    cogstop( SPI_engine_cog~ - 1 )
+
+PRI crash( abort_code )
+{{
+  In case of Bad Things(TM) happening,
+  exit as gracefully as possible.
+}}
+  ' and we no longer need to control any pins from here
+  dira &= !maskAll
+  ' and report our error
+  abort abort_code
+
+PRI send_cmd_slow( cmd, val, crc ) : reply | time_stamp
+{{
+  Send down a command and return the reply.
+  Note: slow is an understatement!
+  Note: this uses the assembly DAT variables for pin IDs,
+  which means that if you run this multiple times (say for
+  multiple SD cards), these values will change for each one.
+  But this is OK as all of these functions will be called
+  during the initialization only, before the PASM engine is
+  running.
+}}
+  ' if this is an application specific command, handle it
+  if (cmd & $80)
+    ' ACMD<n> is the command sequense of CMD55-CMD<n>
+      cmd &= $7F
+      reply := send_cmd_slow( CMD55, 0, $65 )
+      if (reply > 1)
+        return reply  
+  ' the CS line needs to go low during this operation
+  outa |= maskCS
+  outa &= !maskCS
+  ' give the card a few cocks to finish whatever it was doing
+  read_32_slow
+  ' send the command byte
+  send_slow( cmd, 8 )
+  ' send the value long
+  send_slow( val, 32 )   
+  ' send the CRC byte
+  send_slow( crc, 8 )
+  ' is this a CMD12?, if so, stuff byte
+  if cmd == CMD12
+    read_slow
+  ' read back the response (spec declares 1-8 reads max for SD, MMC is 0-8)
+  time_stamp := 9
+  repeat
+    reply := read_slow
+  while( reply & $80 ) and ( time_stamp-- )
+  ' done, and 'reply' is already pre-loaded
+  {
+  if dbg_ptr < (dbg_end-1)
+    byte[dbg_ptr++] := cmd
+    byte[dbg_ptr++] := reply
+    if (cmd&63) == 13
+      ' get the second byte
+      byte[dbg_ptr++] := cmd
+      byte[dbg_ptr++] := read_slow
+  '}  
+
+PRI send_slow( value, bits_to_send )
+  value ><= bits_to_send
+  repeat bits_to_send
+    outa[pinCLK]~
+    outa[pinDI] := value
+    value >>= 1
+    outa[pinCLK]~~
+
+PRI read_32_slow : r
+  repeat 4
+    r <<= 8
+    r |= read_slow
+  
+PRI read_slow : r
+{{
+  Read back 8 bits from the card
+}}
+  ' we need the DI line high so a read can occur
+  outa[pinDI]~~
+  ' get 8 bits (remember, r is initialized to 0 by SPIN)
+  repeat 8
+    outa[pinCLK]~
+    outa[pinCLK]~~
+    r += r + ina[pinDO]
+  ' error check
+  if( (cnt - SPI_block_index) > (clkfreq << 2) )
+    crash( ERR_CARD_BUSY_TIMEOUT )
+   
+DAT
+{{
+        This is the assembly engine for doing fast block
+        reads and writes.  This is *ALL* it does!
+}}
+ORG 0
+SPI_engine_entry
+        ' Counter A drives data out
+        mov ctra,writeMode
+        ' Counter B will always drive my clock line
+        mov ctrb,clockLineMode
+        ' set our output pins to match the pin mask
+        mov dira,maskAll
+        ' handshake that we now control the pins
+        neg user_request,#1
+        wrlong user_request,par
+        ' start my seconds' counter here
+        mov last_time,cnt
+        
+waiting_for_command
+        ' update my seconds counter, but also track the idle 
+        ' time so we can to release the card after timeout.
+        call #handle_time
+        ' read the command, and make sure it's from the user (> 0)
+        rdlong user_request,par
+        cmps user_request,#0 wz,wc
+if_be   jmp #waiting_for_command
+        ' handle our card based commands
+        cmp user_request,#"r" wz
+if_z    jmp #read_ahead
+        cmp user_request,#"w" wz
+if_z    jmp #write_behind
+        cmp user_request,#"z" wz
+if_z    jmp #release_card
+        ' time requests are handled differently
+        cmp user_request,#"t" wz    ' time
+if_z    wrlong seconds,sdAdr    ' seconds goes into the SD index register
+if_z    wrlong dtime,bufAdr     ' the remainder goes into the buffer address register
+        ' in all other cases, clear the user's request
+        mov user_request,#0
+        wrlong user_request,par
+        jmp #waiting_for_command
+       
+
+release_card
+        mov user_cmd,#"z"       ' request a release 
+        neg lastIndexPlus,#1    ' reset the last block index 
+        neg user_idx,#1         ' and make this match it 
+        call #handle_command
+        mov user_request,user_cmd
+        wrlong user_request,par
+        jmp #waiting_for_command
+
+read_ahead
+        rdlong user_idx,sdAdr
+        ' if the correct block is not already loaded, load it
+        mov tmp1,user_idx
+        add tmp1,#1
+        cmp tmp1,lastIndexPlus wz
+if_z    cmp lastCommand,#"r" wz
+if_z    jmp #:get_on_with_it
+        mov user_cmd,#"r"
+        call #handle_command
+:get_on_with_it
+        ' copy the data up into Hub RAM
+        movi transfer_long,#%000010_000 'set to wrlong
+        call #hub_cog_transfer
+        ' signify that the data is ready, Spin can continue
+        mov user_request,user_cmd
+        wrlong user_request,par
+        ' request the next block
+        mov user_cmd,#"r"
+        add user_idx,#1
+        call #handle_command
+        ' done
+        jmp #waiting_for_command
+
+write_behind
+        rdlong user_idx,sdAdr
+        ' copy data in from Hub RAM
+        movi transfer_long,#%000010_001 'set to rdlong
+        call #hub_cog_transfer
+        ' signify that we have the data, Spin can continue
+        mov user_request,user_cmd
+        wrlong user_request,par
+        ' write out the block
+        mov user_cmd,#"w"
+        call #handle_command
+        ' done                      
+        jmp #waiting_for_command
+
+{{
+  Set user_cmd and user_idx before calling this
+}}
+handle_command
+        ' Can we stay in the old mode? (address = old_address+1) && (old mode == new_mode)
+        cmp lastIndexPlus,user_idx wz
+if_z    cmp user_cmd,lastCommand wz
+if_z    jmp #:execute_block_command
+        ' we fell through, must exit the old mode! (except if the old mode was "release")
+        cmp lastCommand,#"w" wz
+if_z    call #stop_mb_write
+        cmp lastCommand,#"r" wz  
+if_z    call #stop_mb_read
+        ' and start up the new mode!
+        cmp user_cmd,#"w" wz
+if_z    call #start_mb_write
+        cmp user_cmd,#"r" wz
+if_z    call #start_mb_read
+        cmp user_cmd,#"z" wz
+if_z    call #release_DO
+:execute_block_command
+        ' track the (new) last index and command
+        mov lastIndexPlus,user_idx
+        add lastIndexPlus,#1
+        mov lastCommand,user_cmd
+        ' do the block read or write or terminate!
+        cmp user_cmd,#"w" wz
+if_z    call #write_single_block
+        cmp user_cmd,#"r" wz
+if_z    call #read_single_block
+        cmp user_cmd,#"z" wz
+if_z    mov user_cmd,#0
+        ' done
+handle_command_ret
+        ret   
+
+{=== these PASM functions get me in and out of multiblock mode ===}
+release_DO
+        ' we're already out of multiblock mode, so
+        ' deselect the card and send out some clocks
+        or outa,maskCS
+        call #in8
+        call #in8
+        ' if you are using pull-up resistors, and need all
+        ' lines tristated, then uncomment the following line.
+        ' for Cluso99
+        'mov dira,#0
+release_DO_ret
+        ret
+        
+start_mb_read  
+        movi block_cmd,#CMD18<<1
+        call #send_SPI_command_fast       
+start_mb_read_ret
+        ret
+
+stop_mb_read
+        movi block_cmd,#CMD12<<1
+        call #send_SPI_command_fast
+        call #busy_fast
+stop_mb_read_ret
+        ret
+
+start_mb_write  
+        movi block_cmd,#CMD25<<1
+        call #send_SPI_command_fast
+start_mb_write_ret
+        ret
+
+stop_mb_write
+        call #busy_fast
+        ' only some cards need these extra clocks
+        mov tmp1,#16
+:loopity
+        call #in8         
+        djnz tmp1,#:loopity
+        ' done with hack
+        movi phsa,#$FD<<1
+        call #out8
+        call #in8       ' stuff byte
+        call #busy_fast
+stop_mb_write_ret
+        ret
+
+send_SPI_command_fast
+        ' make sure we have control of the output lines
+        mov dira,maskAll
+        ' make sure the CS line transitions low
+        or outa,maskCS  
+        andn outa,maskCS
+        ' 8 clocks
+        call #in8 
+        ' send the data
+        mov phsa,block_cmd                      ' do which ever block command this is (already in the top 8 bits)
+        call #out8                               ' write the byte
+        mov phsa,user_idx                       ' read in the desired block index
+        shl phsa,adrShift                       ' this will multiply by 512 (bytes/sector) for MMC and SD
+        call #out8                               ' move out the 1st MSB                              '
+        rol phsa,#1
+        call #out8                               ' move out the 1st MSB                              '
+        rol phsa,#1
+        call #out8                               ' move out the 1st MSB                              '
+        rol phsa,#1
+        call #out8                               ' move out the 1st MSB                              '
+        ' bogus CRC value
+        call #in8                                ' in8 looks like out8 with $FF
+        ' CMD12 requires a stuff byte
+        shr block_cmd,#24
+        cmp block_cmd,#CMD12 wz
+if_z    call #in8                               ' 8 clocks
+        ' get the response
+        mov tmp1,#9
+:cmd_response
+        call #in8
+        test readback,#$80 wc,wz
+if_c    djnz tmp1,#:cmd_response
+if_nz   neg user_cmd,readback
+        ' done        
+send_SPI_command_fast_ret
+        ret    
+                        
+        
+busy_fast
+        mov tmp1,N_in8_500ms
+:still_busy
+        call #in8
+        cmp readback,#$FF wz
+if_nz   djnz tmp1,#:still_busy
+busy_fast_ret
+        ret
+
+
+out8
+        andn outa,maskDI 
+        'movi phsb,#%11_0000000
+        mov phsb,#0
+        movi frqb,#%01_0000000        
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        rol phsa,#1
+        mov frqb,#0
+        ' don't shift out the final bit...already sent, but be aware 
+        ' of this when sending consecutive bytes (send_cmd, for e.g.) 
+out8_ret
+        ret
+
+{
+in8
+        or outa,maskDI
+        mov ctra,readMode
+        ' Start my clock
+        mov frqa,#1<<7
+        mov phsa,#0
+        movi phsb,#%11_0000000
+        movi frqb,#%01_0000000
+        ' keep reading in my value, one bit at a time!  (Kuneko - "Wh)
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        shr frqa,#1
+        mov frqb,#0 ' stop the clock
+        mov readback,phsa
+        mov frqa,#0
+        mov ctra,writeMode
+in8_ret
+        ret
+}
+in8
+        neg phsa,#1' DI high
+        mov readback,#0
+        ' set up my clock, and start it
+        movi phsb,#%011_000000
+        movi frqb,#%001_000000
+        ' keep reading in my value
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        rcl readback,#1
+        test maskDO,ina wc
+        mov frqb,#0 ' stop the clock
+        rcl readback,#1
+        mov phsa,#0 'DI low
+in8_ret
+        ret
+        
+        
+' this is called more frequently than 1 Hz, and
+' is only called when the user command is 0.
+handle_time        
+        mov tmp1,cnt            ' get the current timestamp
+        add idle_time,tmp1      ' add the current time to my idle time counter
+        sub idle_time,last_time ' subtract the last time from my idle counter (hence delta)    
+        add dtime,tmp1          ' add to my accumulator, 
+        sub dtime,last_time     ' and subtract the old (adding delta)
+        mov last_time,tmp1      ' update my "last timestamp"        
+        rdlong tmp1,#0          ' what is the clock frequency?
+        cmpsub dtime,tmp1 wc    ' if I have more than a second in my accumulator
+        addx seconds,#0         ' then add it to "seconds"
+        ' this part is to auto-release the card after a timeout
+        cmp idle_time,idle_limit wz,wc
+if_b    jmp #handle_time_ret    ' don't clear if we haven't hit the limit
+        mov user_cmd,#"z"       ' we can't overdo it, the command handler makes sure
+        neg lastIndexPlus,#1    ' reset the last block index 
+        neg user_idx,#1         ' and make this match it 
+        call #handle_command    ' release the card, but don't mess with the user's request register
+handle_time_ret
+        ret
+
+hub_cog_transfer
+' setup for all 4 passes        
+        mov ctrb,clockXferMode
+        mov frqb,#1 
+        rdlong buf_ptr,bufAdr
+        mov ops_left,#4
+        movd transfer_long,#speed_buf
+four_transfer_passes
+        ' sync to the Hub RAM access
+        rdlong tmp1,tmp1
+        ' how many long to move on this pass? (512 bytes / 4)longs / 4 passes
+        mov tmp1,#(512 / 4 / 4)
+        ' get my starting address right (phsb is incremented 1 per clock, so 16 each Hub access)
+        mov phsb,buf_ptr
+        ' write the longs, stride 4...low 2 bits of phsb are ignored
+transfer_long
+        rdlong 0-0,phsb
+        add transfer_long,incDest4
+        djnz tmp1,#transfer_long
+        ' go back to where I started, but advanced 1 long
+        sub transfer_long,decDestNminus1
+        ' offset my Hub pointer by one long per pass
+        add buf_ptr,#4
+        ' do all 4 passes
+        djnz ops_left,#four_transfer_passes
+        ' restore the counter mode
+        mov frqb,#0
+        mov phsb,#0
+        mov ctrb,clockLineMode
+hub_cog_transfer_ret
+        ret
+        
+
+read_single_block
+        ' where am I sending the data?
+        movd :store_read_long,#speed_buf
+        mov ops_left,#128
+        ' wait until the card is ready
+        mov tmp1,N_in8_500ms
+:get_resp
+        call #in8
+        cmp readback,#$FE wz        
+if_nz   djnz tmp1,#:get_resp
+if_nz   neg user_cmd,#ERR_ASM_NO_READ_TOKEN  
+if_nz   jmp #read_single_block_ret
+        ' set DI high
+        neg phsa,#1
+        ' read the data
+        mov ops_left,#128
+:read_loop        
+        mov tmp1,#4
+        movi phsb,#%011_000000
+:in_byte        
+        ' Start my clock
+        movi frqb,#%001_000000
+        ' keep reading in my value, BACKWARDS!  (Brilliant idea by Tom Rokicki!)
+        test maskDO,ina wc
+        rcl readback,#8
+        test maskDO,ina wc
+        muxc readback,#2
+        test maskDO,ina wc
+        muxc readback,#4
+        test maskDO,ina wc
+        muxc readback,#8
+        test maskDO,ina wc
+        muxc readback,#16
+        test maskDO,ina wc
+        muxc readback,#32
+        test maskDO,ina wc
+        muxc readback,#64
+        test maskDO,ina wc
+        mov frqb,#0 ' stop the clock
+        muxc readback,#128
+        ' go back for more
+        djnz tmp1,#:in_byte
+        ' make it...NOT backwards [8^)
+        rev readback,#0
+:store_read_long
+        mov 0-0,readback       ' due to some counter weirdness, we need this mov
+        add :store_read_long,const512
+        djnz ops_left,#:read_loop
+
+        ' set DI low
+        mov phsa,#0
+        
+        ' now read 2 trailing bytes (CRC)
+        call #in8      ' out8 is 2x faster than in8
+        call #in8      ' and I'm not using the CRC anyway
+        ' give an extra 8 clocks in case we pause for a long time
+        call #in8       ' in8 looks like out8($FF)
+        
+        ' all done successfully
+        mov idle_time,#0
+        mov user_cmd,#0               
+read_single_block_ret
+        ret          
+        
+write_single_block               
+        ' where am I getting the data? (all 512 bytes / 128 longs of it?)
+        movs :write_loop,#speed_buf
+        ' read in 512 bytes (128 longs) from Hub RAM and write it to the card
+        mov ops_left,#128        
+        ' just hold your horses  
+        call #busy_fast 
+        ' $FC for multiblock, $FE for single block
+        movi phsa,#$FC<<1
+        call #out8
+        mov phsb,#0             ' make sure my clock accumulator is right
+        'movi phsb,#%11_0000000
+:write_loop
+        ' read 4 bytes
+        mov phsa,speed_buf
+        add :write_loop,#1
+        ' a long in LE order is DCBA
+        rol phsa,#24            ' move A7 into position, so I can do the swizzled version
+        movi frqb,#%010000000   ' start the clock (remember A7 is already in place)
+        rol phsa,#1             ' A7 is going out, at the end of this instr, A6 is in place
+        rol phsa,#1             ' A5
+        rol phsa,#1             ' A4
+        rol phsa,#1             ' A3
+        rol phsa,#1             ' A2
+        rol phsa,#1             ' A1
+        rol phsa,#1             ' A0
+        rol phsa,#17            ' B7
+        rol phsa,#1             ' B6
+        rol phsa,#1             ' B5
+        rol phsa,#1             ' B4
+        rol phsa,#1             ' B3
+        rol phsa,#1             ' B2
+        rol phsa,#1             ' B1
+        rol phsa,#1             ' B0
+        rol phsa,#17            ' C7
+        rol phsa,#1             ' C6
+        rol phsa,#1             ' C5
+        rol phsa,#1             ' C4
+        rol phsa,#1             ' C3
+        rol phsa,#1             ' C2
+        rol phsa,#1             ' C1
+        rol phsa,#1             ' C0
+        rol phsa,#17            ' D7
+        rol phsa,#1             ' D6
+        rol phsa,#1             ' D5
+        rol phsa,#1             ' D4
+        rol phsa,#1             ' D3
+        rol phsa,#1             ' D2
+        rol phsa,#1             ' D1
+        rol phsa,#1             ' D0 will be in place _after_ this instruction
+        mov frqb,#0             ' shuts the clock off, _after_ this instruction
+        djnz ops_left,#:write_loop
+        ' write out my two (bogus, using $FF) CRC bytes
+        call #in8
+        call #in8
+        ' now read response (I need this response, so can't spoof using out8)
+        call #in8
+        and readback,#$1F
+        cmp readback,#5 wz
+if_z    mov user_cmd,#0 ' great
+if_nz   neg user_cmd,#ERR_ASM_BLOCK_NOT_WRITTEN ' oops
+        ' send out another 8 clocks
+        call #in8 
+        ' all done
+        mov idle_time,#0
+write_single_block_ret
+        ret
+
+        
+{=== Assembly Interface Variables ===}
+pinDO         long 0    ' pin is controlled by a counter
+pinCLK        long 0    ' pin is controlled by a counter
+pinDI         long 0    ' pin is controlled by a counter
+maskDO        long 0    ' mask for reading the DO line from the card
+maskDI        long 0    ' mask for setting the pin high while reading  
+maskCS        long 0    ' mask = (1<<pin), and is controlled directly
+maskAll       long 0
+adrShift      long 9    ' will be 0 for SDHC, 9 for MMC & SD
+bufAdr        long 0    ' where in Hub RAM is the buffer to copy to/from?
+sdAdr         long 0    ' where on the SD card does it read/write?
+writeMode     long 0    ' the counter setup in NCO single ended, clocking data out on pinDI
+'clockOutMode  long 0    ' the counter setup in NCO single ended, driving the clock line on pinCLK
+N_in8_500ms   long 1_000_000 ' used for timeout checking in PASM
+'readMode      long 0
+clockLineMode long 0
+clockXferMode long %11111 << 26
+const512      long 512
+const1024     long 1024
+incDest4      long 4 << 9
+decDestNminus1 long (512 / 4 - 1) << 9         
+
+{=== Initialized PASM Variables ===}
+seconds       long 0
+dtime         long 0
+idle_time     long 0
+idle_limit    long 0
+
+{=== Multiblock State Machine ===}
+lastIndexPlus long -1   ' state handler will check against lastIndexPlus, which will not have been -1
+lastCommand   long 0    ' this will never be the last command.
+
+{=== Debug Logging Pointers ===}
+{
+dbg_ptr       long 0
+dbg_end       long 0
+'}
+
+{=== Assembly Scratch Variables ===}
+ops_left      res 1     ' used as a counter for bytes, words, longs, whatever (start w/ # byte clocks out)
+readback      res 1     ' all reading from the card goes through here
+tmp1          res 1     ' this may get used in all subroutines...don't use except in lowest 
+user_request  res 1     ' the main command variable, read in from Hub: "r"-read single, "w"-write single
+user_cmd      res 1     ' used internally to handle actual commands to be executed
+user_idx      res 1     ' the pointer to the Hub RAM where the data block is/goes
+block_cmd     res 1     ' one of the SD/MMC command codes, no app-specific allowed
+buf_ptr       res 1     ' moving pointer to the Hub RAM buffer
+last_time     res 1     ' tracking the timestamp
+
+{{
+  496 longs is my total available space in the cog,
+  and I want 128 longs for eventual use as one 512-
+  byte buffer.   This gives me a total of 368 longs
+  to use for umount, and a readblock and writeblock
+  for both Hub RAM and Cog buffers.
+}}
+speed_buf     res 128   ' 512 bytes to be used for read-ahead / write-behind
+
+'fit 467
+FIT 496
+
+''      MIT LICENSE
+{{
+'  Permission is hereby granted, free of charge, to any person obtaining
+'  a copy of this software and associated documentation files
+'  (the "Software"), to deal in the Software without restriction,
+'  including without limitation the rights to use, copy, modify, merge,
+'  publish, distribute, sublicense, and/or sell copies of the Software,
+'  and to permit persons to whom the Software is furnished to do so,
+'  subject to the following conditions:
+'
+'  The above copyright notice and this permission notice shall be included
+'  in all copies or substantial portions of the Software.
+'
+'  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+'  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+'  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+'  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+'  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+'  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+'  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+}}

Hardware/ReadMe.txt

@@ -7,6 +7,8 @@ Contents
 
 VDU\vdu.rom: ROM image for VDU onboard EPROM
 
-Prop\PropIO.eeprom: PropIO firmware for use with RomWBW
-Prop\PropIO2.eeprom: PropIO V2 firmware for use with RomWBW
-Prop\ParPortProp.eeprom: ParPortProp firmware for use with RomWBW
+PropIO\PropIO.eeprom: PropIO firmware for use with RomWBW
+
+PropIO2\PropIO2.eeprom: PropIO V2 firmware for use with RomWBW
+
+ParPortProp\ParPortProp.eeprom: ParPortProp firmware for use with RomWBW

ReadMe.txt

@@ -1,266 +1,169 @@
-***********************************************************************
-***                                                                 ***
-***                          R o m W B W                            ***
-***                                                                 ***
-***                    Z80/Z180 System Software                     ***
-***                                                                 ***
-***********************************************************************
+************************************************************
+***                     R o m W B W                      ***
+***                                                      ***
+***       System Software for N8VEM Z80 Projects         ***
+************************************************************
 
-Wayne Warthen (wwarthen@gmail.com)
-Version 2.8.3, 2017-08-23
-https://www.retrobrewcomputers.org/
+Builders: Wayne Warthen (wwarthen@gmail.com)
+          Douglas Goodall (douglas_goodall@mac.com)
+          David Giles (vk5dg@internode.on.net)
 
-RomWBW is a ROM-based implementation of CP/M-80 2.2 and Z-System for 
-all RetroBrew Computers Z80/Z180 hardware platforms including SBC 
-1/2, Zeta 1/2, N8, and Mark IV. Virtually all RetroBrew hardware is 
-supported including floppy, hard disk (IDE, CF Card, SD Card), Video, 
-and keyboard. VT-100 terminal emulation is built-in.
+Updated: 2014-09-19
+Version: 2.6.2
 
-The RomWBW ROM loads and runs the built-in operating systems directly
-from the ROM and includes a selection of standard/useful applications
-accessed via a ROM disk drive.  A RAM disk drive is also provided
-to allow temporary file storage.
+This is an adaptation of CP/M-80 2.2 and ZSDOS/ZCPR
+targeting ROMs for all N8VEM Z80 hardware variations
+including SBC, Zeta, N8, and Mark IV.
 
-Pre-built ROM images are included for all platforms.  Detailed system 
-customization is achieved by making simple modifications to a 
-configuration file and running a build script to generate a custom 
-ROM image. All source and build tools are included in the 
-distribution. As distributed, the build scripts run under any modern 
-32 or 64 bit version of Microsoft Windows.
-
-John Coffman's UNA hardware BIOS is fully supported by RomWBW. In the 
-case of UNA, a single ROM image (pre-built) is used for all supported 
-platforms and is customized using a ROM-based setup program. See the 
-UNA section below for more information.
-
-Quick Start
------------
-
-A pre-built ROM image is included for each of the hardware platforms 
-supported. These ROM images are found in the Binary directory of the 
-distribution and have a file extension of ".rom". Simply program the 
-ROM of your system with the appropriate ROM image. Please see the 
-RomList.txt file in the Binary directory for details on selecting the 
-correct ROM image for your system and platform specific information.
-
-Connect a serial terminal or computer with terminal emulation 
-software to the primary RS-232 port of your CPU board.  A null-modem 
-connection is generally required.  Set the line characteristics to 
-38400 baud, 8 data bits, 1 stop bit, no parity, and no flow control. 
-Select VT-100 terminal emulation.
-
-Upon power-up, your terminal should display a sign-on banner within 2 
-seconds followed by hardware inventory and discovery information.  
-When hardware initialization is completed, a boot loader prompt 
-allows you to choose a ROM-based operating system, system monitor, or 
-boot from a disk device.
-
-CPU Speed
----------
-
-RomWBW ROM images support virtually any CPU speed your system is
-running. However, there are some hardware-oriented caveats to be
-aware of.
-
-The use of high density floppy disks requires a CPU speed of 8 MHz or
-greater.
-
-The latest X-Modem file transfer programs (XM.COM, XM-A0.COM, and
-XM-A1.COM) require a CPU speeed of 6 MHz or greater to support the
-default RomWBW serial port speed of 38400 baud. Older variants of
-the X-Modem programs are included (XM5.COM, XM5-A0, and XM5-A1) which
-will handle 38400 baud on system running down to 4 MHz.
-
-Upgrading from Previous Versions
---------------------------------
-
-Program a new ROM chip from an image in the new distribution. Install 
-the new ROM chip and boot your system. At the boot loader "Boot:" 
-prompt, select either CP/M or Z-System to load the OS from ROM.
-
-If you have spare rom chips for your system, it is always safest to
-keep your existing, work rom chip and program a new one so that you
-can return to the old one if the new one does not work properly.
-
-If you use a customized ROM image, it is recommended that you first
-try the pre-built ROM image first and then move on to generating a
-custom image.
-
-It is entirely possible to reprogram your system ROM using the FLASH
-utility from Will Sowerbutts on your ROM drive (B:). In this case,
-you would need to transfer the new ROM image to your system using
-X-Modem. Obviously, there is some risk to this approach since any
-issues with the programming or ROM image could result in a
-non-functional system.
-
-If your system has any bootable drives, then update the OS image on
-each drive using SYSCOPY. For example, if C: is a bootable drive
-with the Z-System OS, you would update the OS image on this drive
-with the command:
-
-    B>SYSCOPY C:=B:ZSYS.SYS
-
-If you have copies of any of the system utilities on drives other
-than the ROM disk drive, you need to copy the latest version of the
-programs from the ROM drive (B:) to any drives containing these
-programs. For example, if you have a copy of the ASSIGN.COM program
-on C:, you would update it from the new ROM using the COPY command:
-
-    B>COPY B:ASSIGN.COM C:
-
-The following programs are maintained with the ROM images and all
-copies of these programs should be updated when upgrading to a new
-ROM version:
-
-    - ASSIGN.COM
-    - FORMAT.COM
-    - OSLDR.COM
-    - SYSCOPY.COM
-    - TALK.COM
-    - FD.COM
-    - XM*.COM
-
-UNA Hardware BIOS
------------------
-
-John Coffman has produced a new generation of hardware BIOS called 
-UNA. In addition to the classic ROM images, RomWBW comes with a 
-UNA-based image that combines the UNA BIOS with the RomWBW OS 
-implementations and applications.
-
-UNA is customized dynamically using a ROM based setup routine and the
-setup is persisted in the system NVRAM of the RTC chip. This means
-that a single UNA-based ROM image can be used on most of the
-RetroBrew platforms and is easily customized. UNA also supports FAT
-file system access that can be used for in-situ ROM programming and
-loading system images.
-
-While John is likely to enhance UNA over time, there are currently a
-few things that UNA does not support:
-
-    - Floppy Drives
-    - Video/Keyboard/Terminal Emulation
-    - Zeta 1 and N8 Systems
-    - Some older support boards
-
-If you wish to try the UNA variant of RomWBW, then just program your
-ROM with the ROM image called "UNA_std.rom" in the Binary directory.
-This one image is suitable on all of the platforms and hardware UNA
-supports.
-
-Please refer to the RetroBrew Computers Wiki for more information on
-UNA.
-
-CP/M vs. Z-System
------------------
-
-There are two OS variants included in this distribution and you may
-choose which one you prefer to use. Both variants are now included
-in the pre-built ROM images. You will be given the choice to boot
-either CP/M or Z-System at startup.
-
-The traditional Digital Research (DRI) CP/M OS is the first choice.
-The Doc directory contains a manual for CP/M usage ("CPM
-Manual.pdf"). If you are new to the RetroBrew Computer systems, I
-would currently recommend using the CP/M variant to start with simply
-because it has gone through more testing and you are less likely to
-encounter problems.
-
-The other choice is to use the most popular non-DRI CP/M "clone"
-which is generally referred to as Z-System. It is intended to be
-functionally equivalent to CP/M and should run all CP/M 2.2 code. It
-is optimized for the Z80 CPU (as opposed to 8080 for CP/M) and has
-some potentially useful improvements. Please refer to "ZSDOS
-Manual.pdf" and "ZCPR Manual.pdf" in the Doc directory for more
-information on Z-System usage.
-
-ROM Customization
------------------
-
-The pre-built ROM images are configured for the basic capabilities of
-each platform. If you add board(s) to your system, you will need to
-customize your ROM image to include support for the added board(s).
-
-Essentially, the creation of a custom ROM is accomplished by updating
-a small configuration file, then running a script to compile the
-software and generate the custom ROM image. At this time, the build
-process runs on Windows 32 or 64 bit versions. All tools (compilers,
-assemblers, etc.) are included in the distribution, so it is not
-necessary to setup a build environment on your computer.
-
-For those who are interested in more than basic system customization, 
-note that all source code is included (including the operating 
-systems).
-
-Note that the ROM customization process does not apply to UNA. All
-UNA customization is performed within the ROM setup script.
-
-Complete documentation of the customization process is found in the
-ReadMe.txt file in the Source directory.
-
-Source Code Respository
------------------------
-
-All source code and distributions are maintained on GitHub at
-"https://github.com/wwarthen/RomWBW".  Code contributions are very
-welcome.
-
-Distribution Directory Layout
------------------------------
-
-The RomWBW distribution is a compressed zip archive file organized in 
-a set of directories.  Each of these directories has it's own
-ReadMe.txt file describing the contents in detail.  In summary, these
-directories are:
-
-  Binary: The final output files of the build process are placed
-          here.  Most importantly, are the ROM images with the
-	  file names ending in ".rom".
-
-  Doc:    Contains various detailed documentation including the
-          operating systems, RomWBW architecture, etc.
-
-  Source: Contains the source code files used to build the software
-          and ROM images.
-  
-  Tools:  Contains the MS Windows programs that are used by the
-          build process or that may be useful in setting up your
-	  system.
+NOTE: This is very much a work-in-progress.  It is
+severely lacking appropriate documentation.  I am 
+happy to answer questions and provide support though.
 
 Acknowledgements
 ----------------
 
-While I have heavily modified much of the code, I want to acknowledge
-that much of the work is derived or copied from the work of others in
-the RetroBrew Computers project including Andrew Lynch, Dan Werner,
-Max Scane, David Giles, John Coffman, and probably many others I am
-not clearly aware of (let me know if I omitted someone!).
+While I have heavily modified much of the code, I want
+to acknowledge that much of this is derived or
+copied from the work of others in the N8VEM
+project including Andrew Lynch, Dan Werner, Max Scane,
+David Giles, John Coffman, and probably many others 
+I am not clearly aware of (let me know if I omitted
+someone!).
 
-I especially want to credit Douglas Goodall for contributing code,
-time, testing, and advice. He created an entire suite of application
-programs to enhance the use of RomWBW. However, he is looking for
-someone to continue the maintenance of these applications and they
-have become unusable due to changes within RomWBW. As of RomWBW 2.6,
-these applications are no longer provided.
+I especially want to credit Douglas Goodall for 
+contributing code, time, testing, and advice.  He created
+an entire suite of application programs to enhance the
+use of RomWBW.  However, he is looking for someone to
+continue the maintenance of these applications and
+they have become unusable due to changes within
+RomWBW.  As of RomWBW 2.6, these applications are
+no longer provided.
 
-David Giles has contributed support for the CSIO support in the SD
-Card driver.
+David Giles has contributed support for building the
+ROM under Linux and the CSIO support in the SD Card driver.
 
-The UNA BIOS is a product of John Coffman.
-
-Getting Assistance
+Usage Instructions
 ------------------
 
-The best way to get assistance with RomWBW or any aspect of the
-RetroBrew Computers projects is via the community forum at
-"https://www.retrobrewcomputers.org/forum/".
+The distribution includes many pre-built ROM
+images in the Output directory.  The simplest way of
+using this ROM is to simply pick the pre-built ROM
+that most closely matches your preferences, burn it,
+and use it.
 
-Also feel free to email Wayne Warthen at wwarthen@gmail.com.
+Refer to the file called RomList.txt for a complete
+list of the ROMs that are included and the required
+hardware configuration that they support.
 
-To Do
+Upgrading from Previous Versions
+--------------------------------
+
+Burn a new ROM image appropriate for your system
+and boot under that new ROM.  You may want to use
+a different ROM chip in case the new version does
+not work.
+
+If you are using "boot from disk", you will need
+to update the OS image on all drives you boot from.
+To do this, use SYSCOPY.  Something like this
+would make sense:
+
+    B:SYSCOPY C:=B:ZSYS.SYS
+
+CPU Speed & Baud Rate
+---------------------
+
+The startup serial port baud rate in all pre-built
+RomWBW variants is 38.4Kbps.  While this speed is
+nice in that it provides great display and file
+transfer performance, it does push the limits of
+slower hardware.  Specifically, XModem v12.5 (the
+default XM.COM) on the distribution is unable to
+service the serial port fast enough if the CPU is
+running at 4MHz.  Your options are to 1) use the
+old version of XModem (XM5.COM), put a faster CPU
+oscillator in your system (6MHz or above), or
+3) decrease the baud rate by building a custom
+ROM.
+
+UNA Variant
+-----------
+
+RomWBW will now run under it's native BIOS (HBIOS) or
+under UNA BIOS (UBIOS).  There are pre-built ROM
+images for UNA in the Output directory.
+
+CP/M vs. ZSystem
+----------------
+
+There are two OS variants included in this distribution
+and you may choose which one you prefer to use.
+
+The traditional Digital Research (DRI) CP/M code is the first
+choice.  The Doc
+directory contains a manual for CP/M usage (cpm22-m.pdf).
+If you are new to the N8VEM systems, I would currently
+recommend using the CP/M variant to start with simply
+because they have gone through more testing and you
+are less likely to encounter problems.
+
+The other choice is to use the most popular non-DRI
+CP/M "clone" which is generally referred to as
+ZSystem.  These are intended to be
+functionally equivalent to CP/M and should run all
+CP/M 2.2 code.  They are optimized for the Z80 CPU
+(as opposed to 8080 for CP/M) and have some potentially
+useful improvements.  Please refer to the Doc directory
+and look at the files for zsdos and zcpr (zsdos.pdf &
+zcpr.doc as well as ZSystem.txt).
+
+Both variants are now included in the pre-built ROM images.
+You will be given the choice to boot either CP/M or
+ZSystem at startup.
+
+Building a Custom ROM
+---------------------
+
+I strongly suggest you start with burning one of the
+pre-built ROMs and making sure that works first.  Once
+you have gotten past that hurdle, you should consider
+building a custom ROM.  It is very easy and the
+distribution comes with everything that is needed to
+run a build on a Windows 32 bit or 64 bit system --
+basically Windows XP or above.  There is also a
+Linux build now available.
+
+Creating a custom ROM allows you to customize a lot
+of useful stuff like adding support for a DSKY if
+you have one.
+
+Please refer to the Build.txt file in the Doc directory
+for detailed instructions for building a custom ROM.  If
+you are using Linux, also read the LinuxBuild.txt file.
+
+Formatting Media
+----------------
+
+<TBD>
+
+Creating Bootable Media
+-----------------------
+
+<TBD>
+
+Using Slices on Mass Storage Devices
+------------------------------------
+
+<TBD>
+
+Managing Console I/O
+--------------------
+
+<TBD>
+
+Notes
 -----
 
-    - Formatting Media
-    - Making a Disk Bootable
-    - Assigning disks/slices to drives
-    - Managing the Console
+I realize these instructions are very minimal.  I am happy to answer
+questions.  You will find the Google Group 'N8VEM' to be a great
+source of information as well.

RomList.txt

@@ -0,0 +1,221 @@
+You should find the following ROM
+images in the Output driectory.
+Refer to the descriptions below to select 
+one that matches your hardware 
+configuration, burn it, and use it.
+
+Note that there are no longer separate
+ROM images for CP/M and ZSystem.  Both
+OS variants are now imbedded in the ROM
+image and you are given the ability to
+choose the one you want to boot at
+startup.
+
+Note that all builds are now set for 512KB ROMs.
+The builds will work fine in 1MB ROMs.  If you
+want to use the full 1MB ROM address space, just
+do a cutom build.
+
+Note that all builds are now set for 38.4Kbps
+baud rate on the console with 8 data bits, no
+parity, and 1 stop bit.  The baud rate can be
+changed in the config file if you want to do a
+custom build.
+
+  N8VEM_std.rom for N8VEM Z80 SBC V1/V2:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk (no floppy/IDE)
+    - Drives A:=ROM, B:=RAM
+
+  N8VEM_diskio.rom for N8VEM Z80 SBC V1/V2 + DISKIO:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - Floppy support via DISKIO
+    - IDE support via DISKIO
+    - Drives A:=ROM, B:=RAM, C:=FD0, D:=FD1, E:=IDE0-00, F:=IDE0-01, G:=IDE0-02, H:=IDE0-03
+
+  N8VEM_dide.rom for N8VEM Z80 SBC V1/V2 + DUAL IDE:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - Floppy support via DISKIO
+    - IDE support via DISKIO
+    - Drives A:=ROM, B:=RAM, C:=FD0, D:=FD1, E:=IDE0-00, F:=IDE0-01, G:=IDE0-02, H:=IDE0-03
+    
+  N8VEM_diskio3.rom for N8VEM Z80 SBC V1/V2 + DISKIO3:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - Floppy support via DISKIO3
+    - IDE support via DISKIO3
+    - Drives A:=ROM, B:=RAM, C:=FD0, D:=FD1, E:=IDE0-00, F:=IDE0-01, G:=IDE0-02, H:=IDE0-03
+
+  N8VEM_diskio3+cvdu.rom for N8VEM Z80 SBC V1/V2 + DISKIO3:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - Floppy support via DISKIO3
+    - IDE support via DISKIO3
+    - ColorVDU board support
+    - Drives A:=ROM, B:=RAM, C:=FD0, D:=FD1, E:=IDE0-00, F:=IDE0-01, G:=IDE0-02, H:=IDE0-03
+	- NOTE: Console defaults to CRT & PS/2 Keyboard.  Short JP2
+	  (one bit input port) to use the serial port as the console.
+
+  N8VEM_ppide.rom for N8VEM Z80 SBC V1/V2 + PPIDE:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - IDE support via DISKIO
+    - Drives A:=ROM, B:=RAM, C:=PPIDE0-00, D:=PPIDE0-01, E:=PPIDE0-02, F:=PPIDE0-03
+    
+  N8VEM_ppisd.rom for N8VEM Z80 SBC V1/V2 + PPISD:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - PPISD support
+    - Drives A:=ROM, B:=RAM, C:=SD0-00, D:=SD0-01, E:=SD0-02, F:=SD0-03
+    
+  N8VEM_dsd.rom for N8VEM Z80 SBC V1/V2 + Dual SD:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - Dual SD support
+    - Drives A:=ROM, B:=RAM, C:=SD0-00, D:=SD0-01, E:=SD0-02, F:=SD0-03
+    
+  N8VEM_propio.rom for N8VEM Z80 SBC V1/V2 + PROPIO:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - SD Card support via PropIO
+    - VGA console support via PropIO
+    - PS/2 Keyboard support via PropIO
+    - Drives A:=ROM, B:=RAM, C:=PRPSD0-00, D:=PRPSD0-01, E:=PRPSD0-02, F:=PRPSD0-03
+	- WARNING: You must use the RomWBW specific firmware
+	  for the Propeller found in the Support directory!
+	- NOTE: Console defaults to VGA & PS/2 Keyboard.  Short JP2
+	  (one bit input port) to use the serial port as the console.
+
+  N8VEM_mfp.rom for N8VEM Z80 SBC V1/V2:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk (no floppy)
+    - Drives A:=ROM, B:=RAM, C:=PPIDE0-00, D:=PPIDE0-01, E:=PPIDE0-02, F:=PPIDE0-03
+    - IDE support via Multifunction / PIC
+    - Second UART via Multifunction / PIC
+
+  N8VEM_ci.rom for N8VEM Z80 SBC V1/V2:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk (no floppy/IDE)
+    - Drives A:=ROM, B:=RAM
+    - Cassette Interface mapped to RDR/PUN
+
+  N8VEM_simh.rom for N8VEM SIMH Simulator:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk (no floppy/IDE)
+    - Drives A:=ROM, B:=RAM, C:=HDSK0-00, D:=HDSK0-01, E:=HDSK0-02, F:=HDSK0-03
+
+  N8VEM_rf.rom for N8VEM Z80 SBC V1/2 + RAM Flopppy:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk (no floppy/IDE)
+    - RAM Floppy support
+    - Drives A:=ROM, B:=RAM, C:=RF0, D:=RF1
+
+  N8VEM_vdu.rom for N8VEM Z80 SBC V1/V2:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - VDU board support
+    - Drives A:=ROM, B:=RAM
+	- NOTE: Console defaults to CRT & PS/2 Keyboard.  Short JP2
+	  (one bit input port) to use the serial port as the console.
+    
+  N8VEM_cvdu.rom for N8VEM Z80 SBC V1/V2:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - ColorVDU board support
+    - Drives A:=ROM, B:=RAM
+	- NOTE: Console defaults to CRT & PS/2 Keyboard.  Short JP2
+	  (one bit input port) to use the serial port as the console.
+    
+  ZETA_std.rom for Zeta Z80 SBC:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - Floppy support via built-in FDC
+    - PPIDE support via built-in PPI
+    - Drives A:=ROM, B:=RAM, C:=FD0, D:=FD1, E:=PPIDE00-0, F:=PPIDE0-01, G:=PPIDE0-02, H:=PPIDE0-03
+
+  ZETA_ppp.rom for Zeta Z80 SBC w/ ParPortProp:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - Floppy support via built-in FDC
+    - SD Card support via ParPortProp
+    - VGA console support via ParPortProp
+    - PS/2 Keyboard support via ParPortProp
+    - Drives A:=ROM, B:=RAM, C:=FD0, D:=FD1, E:=PPPSD0-00, F:=PPPSD0-01, F:=PPPSD0-02, G:=PPPSD0-03
+	- WARNING: You must use the RomWBW specific firmware
+	  for the Propeller found in the Support directory!
+	- NOTE: Console defaults to VGA & PS/2 Keyboard.  Short JP1 (CONFIG)
+	  to use the serial port as the console.
+
+  N8_2511.rom for N8 2511 Z180:
+    - Assumes oscillator frequency of 18.432MHz
+    - CPU clock at X1 (18.432MHz)
+    - 512KB ROM, 1MB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - Floppy support via built-in FDC
+    - SD card support via built-in SD card slot
+    - Drives A:=ROM, B:=RAM, C:=FD0, D:=FD1, E:=SD0-00, F:=SD0-01, G:=SD0-02, H:=SD0-03
+
+  N8_2312.rom for N8 2312 Z180:
+    - Assumes oscillator frequency of 18.432MHz
+    - CPU clock at X1 (18.432MHz)
+    - 512KB ROM, 1MB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk
+    - Floppy support via built-in FDC
+    - SD card support via built-in SD card slot
+    - Drives A:=ROM, B:=RAM, C:=FD0, D:=FD1, E:=SD0-00, F:=SD0-01, G:=SD0-02, H:=SD0-03
+
+  MK4_std.rom for Mark IV Z180 SBC:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk (no floppy/IDE)
+    - Onboard SD Card
+    - Onboard IDE
+    - Drives A:=ROM, B:=RAM, C:=SD0-0, D:=SD0-1, E:=IDE0-00, F:=IDE0-01
+
+  MK4_diskio3.rom for Mark IV Z180 SBC:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk (no floppy/IDE)
+    - Floppy support via DISKIO3
+    - IDE support via DISKIO3
+    - Drives A:=ROM, B:=RAM, C:=FD0, D:=FD1, E:=IDE0-00, F:=IDE0-01, G:=IDE0-02, H:=IDE0-03
+
+  MK4_propio.rom for Mark IV Z180 SBC:
+    - 512KB ROM, 512KB RAM
+    - 38.4KB serial console baud rate
+    - Basic ROM/RAM disk (no floppy/IDE)
+    - SD Card support via PropIO
+    - VGA console support via PropIO
+    - PS/2 Keyboard support via PropIO
+    - Drives A:=ROM, B:=RAM, C:=PRPSD0-00, D:=PRPSD0-01, E:=PRPSD0-02, F:=PRPSD0-03
+	- WARNING: You must use the RomWBW specific firmware
+	  for the Propeller found in the Support directory!
+	- NOTE: Console defaults to VGA & PS/2 Keyboard.  Short JP2
+	  (one bit input port) to use the serial port as the console.
+
+  UNA_std.rom for all UNA support platforms (SBC V1/2, Zeta, N8, Mark IV)
+    - 512KB ROM
+    - Initial baud rate is 9600, but can be configured
+    - Resources are managed dynamically by UNA BIOS
+    - Refer to UNA project for more details

Sim.cfg

@@ -1,12 +1,18 @@
+; $Id: n8vem 1969 2008-06-26 05:57:30Z hharte $
+;
+; SIMH/AltairZ80 Configuration file for the N8VEM SBC
+; http://groups.google.com/group/n8vem/web/n8vem-single-board-computer-home-page
+;
+; Copyright (c) 2008 Howard M. Harte
+
 set cpu z80
 ;set throttle 4K
 set cpu noaltairrom
-set n8vem enabled
-;set n8vem enabled debug=verbose
+set n8vem enabled debug=verbose
 set debug debug.log
 
 ; Console
-; set console telnet=23
+set console telnet=23
 
 ; Configure Serial Port (Basic polled 16550 UART)
 set sio tty
@@ -22,9 +28,9 @@ echo ROM Image: '%1'
 attach n8vem0 %1
 
 ; hard disks
-;set hdsk debug=read;write;verbose
-attach hdsk0 ..\..\Binary\hd0.img
-attach hdsk1 ..\..\Binary\hd1.img
+set hdsk debug=read;write;verbose
+attach hdsk0 hd0.img
+attach hdsk1 hd1.img
 set hdsk0 format=HDSK
 set hdsk1 format=HDSK
 set hdsk0 geom=T:520/N:256/S:512
@@ -32,14 +38,6 @@ set hdsk1 geom=T:520/N:256/S:512
 set hdsk0 wrtenb
 set hdsk1 wrtenb
 
-; enable timer interrupt, 50Hz
-; DDT, SID, etc. use the normal IM 1 vector 6 ($38)
-; for breakpoints so we use vector 6 ($30)
-d timd 20
-;d timh 38
-d timh 30
-set simh timeron
-
 ; start emulation
 echo
 go

Source/Apps/Assign.asm

@@ -18,8 +18,6 @@
 ;_______________________________________________________________________________
 ;
 ; Change Log:
-;   2016-03-21 [WBW] Updated for HBIOS 2.8
-;   2016-04-08 [WBW] Determine key memory addresses dynamically
 ;_______________________________________________________________________________
 ;
 ; ToDo:
@@ -39,7 +37,7 @@ bdos	.equ	$0005		; BDOS invocation vector
 stamp	.equ	$40		; loc of RomWBW CBIOS zero page stamp
 ;
 rmj	.equ	2		; CBIOS version - major
-rmn	.equ	8		; CBIOS version - minor
+rmn	.equ	6		; CBIOS version - minor
 ;
 ;===============================================================================
 ; Code Section
@@ -78,11 +76,11 @@ exit:	; clean up and return to command processor
 ;
 init:
 ;
-	; locate start of cbios (function jump table)
+	; locate cbios function table address
 	ld	hl,(restart+1)	; load address of CP/M restart vector
 	ld	de,-3		; adjustment for start of table
 	add	hl,de		; HL now has start of table
-	ld	(bioloc),hl	; save it
+	ld	(cbftbl),hl	; save it
 ;
 	; get location of config data and verify integrity
 	ld	hl,stamp	; HL := adr or RomWBW zero page stamp
@@ -134,60 +132,23 @@ init:
 	ld	c,a		; set BC := 0A
 	ld 	b,0		; ... so BC is length to copy
 	ldir			; do the copy
-;
-	; determine end of CBIOS (assume HBIOS for now)
-	ld	hl,($FFFE)	; get proxy start address
-	ld	(bioend),hl	; save as CBIOS end address
 ;
 	; check for UNA (UBIOS)
-	ld	a,($FFFD)	; fixed location of UNA API vector
-	cp	$C3		; jp instruction?
+	ld	a,($fffd)	; fixed location of UNA API vector
+	cp	$c3		; jp instruction?
 	jr	nz,initx	; if not, not UNA
-	ld	hl,($FFFE)	; get jp address
+	ld	hl,($fffe)	; get jp address
 	ld	a,(hl)		; get byte at target address
-	cp	$FD		; first byte of UNA push ix instruction
+	cp	$fd		; first byte of UNA push ix instruction
 	jr	nz,initx	; if not, not UNA
 	inc	hl		; point to next byte
 	ld	a,(hl)		; get next byte
-	cp	$E5		; second byte of UNA push ix instruction
+	cp	$e5		; second byte of UNA push ix instruction
 	jr	nz,initx	; if not, not UNA
 	ld	hl,unamod	; point to UNA mode flag
-	ld	(hl),$FF	; set UNA mode flag
-	ld	c,$F1		; UNA func: Get HMA
-	rst	08		; call UNA, HL := UNA proxy start address
-	ld	(bioend),hl	; save as CBIOS end address
+	ld	(hl),$ff	; set UNA mode
 ;
 initx:
-	; compute size of CBIOS
-	ld	hl,(bioend)	; HL := end address
-	ld	de,(bioloc)	; DE := starting address
-	xor	a		; clear carry
-	sbc	hl,de		; subtract to get size in HL
-	ld	(biosiz),hl	; and save it
-;
-	; establish heap limit
-	ld	hl,(bioend)	; HL := end of CBIOS address
-	ld	de,-$40		; allow 40 bytes for CBIOS stack
-	add	hl,de		; adjust
-	ld	(heaplim),hl	; save it
-;
-#if 0
-	ld	a,' '
-	call	crlf
-	ld	bc,(bioloc)
-	call	prthexword
-	call	prtchr
-	ld	bc,(bioend)
-	call	prthexword
-	call	prtchr
-	ld	bc,(maploc)
-	call	prthexword
-	call	prtchr
-	ld	bc,(heaplim)
-	call	prthexword
-	
-#endif
-;
  	; return success
 	xor	a		; signal success
 	ret			; return
@@ -313,7 +274,7 @@ usage:
 	call	crlf2		; blank line
 	ld	de,msguse	; point to usage message
 	call	prtstr		; print it
-	or	$FF		; signal no action performed
+	or	$ff		; signal no action performed
 	ret			; and return
 ;
 devlist:
@@ -322,24 +283,28 @@ devlist:
 	or	a		; set flags
 	jr	nz,devlstu	; do UNA mode dev list
 ;
-	ld	b,$F8		; hbios func: sysget
-	ld	c,$10		; sysget subfunc: diocnt
-	rst	08		; call hbios, E := device count 
-	ld	b,e		; use device count for loop count
+	ld	b,$1a		; hbios func: diodevcnt
+	rst	08		; call hbios, device count to B
 	ld	c,0		; use C for device index
 devlist1:
 	call	crlf		; formatting
 	ld	de,indent	; indent
 	call	prtstr		; ... to look nice
 	push	bc		; preserve loop control
-	ld	a,c		; device to A
+	ld	b,$1b		; hbios func: diodevinf
+	rst	08		; call hbios, return device/unit in C
+	ld	a,c		; device/unit to A
+	push	af		; save it
 	call	prtdev		; print device mnemonic
+	pop	af		; get device/unit back
+	and	$0f		; isolate unit num
+	call	prtdecb		; append unit num
 	ld	a,':'		; colon for device/unit format
 	call	prtchr		; print it
 	pop	bc		; restore loop control
 	inc	c		; next device index
 	djnz	devlist1	; loop as needed
-	or	$FF		; signal no action taken
+	or	$ff		; signal no action taken
 	ret			; done
 ;
 devlstu:
@@ -374,19 +339,19 @@ devlstu1:
 ;
 install:
 	; capture CBIOS snapshot and stack frame for error recovery
-	ld	hl,(bioloc)	; start of CBIOS
+	ld	hl,$e600	; start of CBIOS
 	ld	de,$8000	; save it here
-	ld	bc,(biosiz)	; size of CBIOS
+	ld	bc,$fc00 - $e600	; size of CBIOS
 	ldir			; save it
 	ld	(xstksav),sp	; save stack frame
 	; clear CBIOS buffer area
 	ld	hl,(maploc)	; start fill at drive map
-	ld	a,(bioend + 1)	; msb of CBIOS end address to A
+	ld	a,$FC		; stop when msb is $FC
 install1:
 	ld	e,0		; fill with null
 	ld	(hl),e		; fill next byte
 	inc	hl		; point to next byte
-	cp	h		; is H == msb of CBIOS end address?
+	cp	h		; is H == $FC?
 	jr	nz,install1	; if not, loop
 ;
 	; determine the drive map entry count
@@ -422,13 +387,15 @@ install3:
 	ld	de,(maploc)	; target is CBIOS map loc
 	ldir			; do it
 ;
-	; set start of memory allocation heap
-	ld	(heaptop),de	; DE has next byte available
+	; set start of allocation memory
+	ld	(buftop),de	; DE has next byte available
 ;
 	; allocate directory buffer
-	ld	hl,128		; size of directory buffer
+	ld	bc,128		; size of directory buffer
 	call	alloc		; allocate the space
-	jp	c,instovf	; handle overflow error
+	jp	nz,instovf	; handle overflow error
+	push	bc		; move mem pointer
+	pop	hl		; ... to hl
 	ld	(dirbuf),hl	; ... and save in dirbuf
 ;
 dph_init:
@@ -445,22 +412,22 @@ dph_init:
 dph_init1:
 	; no DPH if drive not assigned
 	ld	a,(hl)
-	cp	$FF
+	cp	$ff
 	jr	nz,dph_init2
 	ld	de,0		; not assigned, use DPH pointer of zero
 	jr	dph_init3
 ;
 dph_init2:
-	ld	a,(hl)		; unit to A
 	push	bc		; save loop control
 	push	hl		; save drive map pointer
-	ld	hl,16		; size of a DPH structure
+	ld	bc,16		; size of a DPH structure
 	call	alloc		; allocate space for dph
-	jp	c,instovf	; handle overflow error
-	push	hl		; save DPH location
-	push	hl		; move DPH location
+	jp	nz,instovf	; handle overflow error
+	push	bc		; save DPH location
+	push	bc		; move DPH location
 	pop	de		; ... to DE
-	call	makdph		; make the DPH, unit in A from above
+	ld	a,(hl)		; device/unit to A
+	call	makdph		; make the DPH
 	pop	de		; restore DPH pointer to DE
 	pop	hl		; restore drive map pointer to HL
 	pop	bc		; restore loop control
@@ -479,8 +446,8 @@ dph_init3:
 	call	crlf2
 	ld	de,indent
 	call	prtstr
-	ld	hl,(heaplim)	; subtract high water
-	ld	de,(heaptop)	; ... from top of cbios
+	ld	hl,$fc00 - $40	; subtract high water
+	ld	de,(buftop)	; ... from top of cbios
 	or	a		; ... with cf clear
 	sbc	hl,de		; ... so hl gets bytes free
 	call	prtdecw		; print it
@@ -537,7 +504,7 @@ makdphwbw:	; determine appropriate dpb (WBW mode)
 	ld	e,2		; assume ram
 	cp	$00+1		; ram?
 	jr	z,makdph0	; yes, jump ahead
-	and	$F0		; ignore unit nibble now
+	and	$f0		; ignore unit nibble now
 	ld	e,6		; assume floppy
 	cp	$10		; floppy?
 	jr	z,makdph0	; yes, jump ahead
@@ -580,57 +547,19 @@ makdph1:
 	dec	de		; ... prefix data (cks & als buf sizes)
 	call	makdph2		; handle cks buf, then fall thru for als buf
 	ret	nz		; bail out on error
-
-;makdph2:
-;	ex	de,hl		; point hl to cks/als size adr
-;	ld	c,(hl)		; bc := cks/als size
-;	inc	hl		; ... and bump
-;	ld	b,(hl)		; ... past
-;	inc	hl		; ... cks/als size
-;	ex	de,hl		; bc and hl roles restored
-;	ld	a,b		; check to see
-;	or	c		; ... if bc is zero
-;	jr	z,makdph3	; if zero, bypass alloc, use zero for address
-;	call	alloc		; alloc bc bytes, address returned in bc
-;	jp	nz,instovf	; handle overflow error
-;makdph3:
-;	ld	(hl),c		; save cks/als buf
-;	inc	hl		; ... address in
-;	ld	(hl),b		; ... dph and bump
-;	inc	hl		; ... to next dph entry	
-;	xor	a		; signal success
-;	ret
-
 makdph2:
-	; DE = address of CKS or ALS buf to allocate
-	; HL = address of field in DPH to get allocated address
-	push	hl		; save DPH field ptr
-	pop	bc		; into BC
-;
-	; HL := alloc size, DE bumped
-	ex	de,hl
-	ld	e,(hl)		; get size to allocate 
-	inc	hl		; ...
-	ld	d,(hl)		; ... into HL
-	inc	hl		; and bump DE
-	ex	de,hl
-;
-	; check for size of zero, special case
-	ld	a,h		; check to see
-	or	l		; ... if hl is zero
-	jr	z,makdph3	; if so, jump ahead using hl as address
-;
-	; allocate memory
-	call	alloc		; do the allocation
-	jp	c,instovf	; bail out on overflow
-	
+	ex	de,hl		; point hl to cks/als size adr
+	ld	c,(hl)		; bc := cks/als size
+	inc	hl		; ... and bump
+	ld	b,(hl)		; ... past
+	inc	hl		; ... cks/als size
+	ex	de,hl		; bc and hl roles restored
+	ld	a,b		; check to see
+	or	c		; ... if bc is zero
+	jr	z,makdph3	; if zero, bypass alloc, use zero for address
+	call	alloc		; alloc bc bytes, address returned in bc
+	jp	nz,instovf	; handle overflow error
 makdph3:
-	; swap hl and bc
-	push	bc		; bc -> (sp)
-	ex	(sp),hl		; (sp) -> hl, hl -> (sp)
-	pop	bc		; (sp) -> bc
-;
-	; save allocated address
 	ld	(hl),c		; save cks/als buf
 	inc	hl		; ... address in
 	ld	(hl),b		; ... dph and bump
@@ -644,30 +573,40 @@ instovf:
 	; restore stack frame and CBIOS image
 	ld	sp,(xstksav)	; restore stack frame
 	ld	hl,$8000	; start of CBIOS image buffer
-	ld	de,(bioloc)	; start of CBIOS
-	ld	bc,(biosiz)	; size of CBIOS
+	ld	de,$e600	; start of CBIOS
+	ld	bc,$fc00 - $e600	; size of CBIOS
 	ldir			; restore it
 	jp	errovf
 ;
-; Allocate HL bytes from heap
-; Return pointer to allocated memory in HL
-; On overflow error, C set
-;
 alloc:
-	push	de		; save de so we can use it for work reg
-	ld	de,(heaptop)	; get current heap top
-	push	de		; and save for return value
-	add	hl,de		; add requested space, hl := new heap top
-	jr	c,allocx	; test for cpu memory space overflow
-	ld	de,(heaplim)	; load de with heap limit
-	ex	de,hl		; de=new heaptop, hl=heaplim
-	sbc	hl,de		; heaplim - heaptop
-	jr	c,allocx	; c set on overflow error
-	; allocation succeeded, commit new heaptop              
-	ld	(heaptop),de	; save new heaptop
-allocx:                         
-	pop	hl		; return value to hl
-	pop	de		; recover de
+;
+; allocate bc bytes from buf pool, return starting
+; address in bc.  leave all other regs alone except a
+; z for success, nz for failure
+;
+	push	de		; save original de
+	push	hl		; save original hl
+	ld	hl,(buftop)	; hl := current buffer top
+	push	hl		; save as start of new buffer
+	push	bc		; get byte count
+	pop	de		; ... into de
+	add	hl,de		; add it to buffer top
+	ld	a,$ff		; assume overflow failure
+	jr	c,alloc1	; if overflow, bypass with a == $ff
+	push	hl		; save it
+	ld	de,$10000 - $FC00 + $40	; setup de for overflow test
+	add	hl,de		; check for overflow
+	pop	hl		; recover hl
+	ld	a,$ff		; assume failure
+	jr	c,alloc1	; if overflow, continue with a == $ff
+	ld	(buftop),hl	; save new top
+	inc	a		; signal success
+;
+alloc1:
+	pop	bc		; buf start address to bc
+	pop	hl		; restore original hl
+	pop	de		; restore original de
+	or	a		; signal success
 	ret
 ;
 ; Scan drive map table for integrity
@@ -679,7 +618,7 @@ valid:
 	ld	b,16 - 1	; loop one less times than num entries
 ;
 	; check that drive A: is assigned
-	ld	a,$FF		; value that indicates unassigned
+	ld	a,$ff		; value that indicates unassigned
 	cp	(hl)		; compare to A: value
 	jp	z,errnoa	; handle failure
 ;
@@ -705,11 +644,11 @@ valid2:		; setup for inner loop
 ;
 valid3:		; inner loop
 	; bypass unassigned drives (only need to test 1)
-	ld	a,(hl)		; get first drive unit in A
-	cp	$FF		; unassigned?
+	ld	a,(hl)		; get first drive device/unit in A
+	cp	$ff		; unassigned?
 	jr	z,valid4	; yes, skip
 ;
-	; compare unit/slice values
+	; compare device/unit/slice values
 	ld	a,(de)		; first byte to A
 	cp	(hl)		; compare
 	jr	nz,valid4	; if not equal, continue loop
@@ -753,7 +692,7 @@ drvdel:
 	rlca			; ... as drive num * 4
 	call	addhl		; get final table offset
 	; wipe out the drive letter
-	ld	a,$FF		; dev/unit := $FF (unassigned)
+	ld	a,$ff		; dev/unit := $FF (unassigned)
 	ld	(hl),a		; do it
 	xor	a		; zero accum
 	inc	hl		; slice := 0
@@ -829,7 +768,7 @@ drvswap:
 	xor	a		; signal success
 	ret			; exit
 ;
-; Assign drive to specified unit/slice
+; Assign drive to specified device/unit/slice
 ;
 drvmap:
 	; check for UNA mode
@@ -862,46 +801,32 @@ drvmap1:	; loop through device table looking for a match
 	djnz	drvmap1		; and loop
 	jp	errdev
 ;
-drvmap2:	
-	; convert index to device type id
-	ld	a,c		; index to accum
+drvmap2:	; verify the unit is eligible for assignment (hard disk unit only!)
+	ld	a,c		; get the specified device number
+;	call	chktyp		; check it
+;	jp	nz,errtyp	; abort with bad unit error
+;
+	; construct the requested dph table entry
+	ld	a,c		; C has device num
 	rlca			; move it to upper nibble
 	rlca			; ...
 	rlca			; ...
 	rlca			; ...
-	ld	(device),a	; save as device id
+	ld	c,a		; stash it back in C
+	ld	a,(unit)	; get the unit number
+	or	c		; combine device and unit
+	ld	c,a		; and save in C
+	ld	a,(slice)	; get the slice
+	ld	b,a		; and save in B
 ;
-	; loop thru hbios units looking for device type/unit match
-	ld	b,$F8		; hbios func: sysget
-	ld	c,$10		; sysget subfunc: diocnt
-	rst	08		; call hbios, E := device count 
-	ld	b,e		; use device count for loop count
-	ld	c,0		; use C for device index
-drvmap3:
-	push	bc		; preserve loop control
-	ld	b,$17		; hbios func: diodevice
-	rst	08		; call hbios, D := device, E := unit
-	pop	bc		; restore loop control
-	ld	a,(device)
-	cp	d
-	jr	nz,drvmap4
-	ld	a,(unit)
-	cp	e
-	jr	z,drvmap5	; match, continue, C = BIOS unit
-drvmap4:
-	; continue looping
-	inc	c
-	djnz	drvmap3
-	jp	errdev		; invalid device specified
+	; check for valid device/unit (supported by BIOS)
+	push	bc		; save device/unit/slice
+	ld	a,c		; device/unit to A
+	call	chkdev		; device/unit OK?
+	pop	bc		; restore device/unit/slice
+;	jp	nz,errdev	; invalid device specified
+	ret	nz
 ;
-drvmap5:
-	; check for valid unit (supported by BIOS)
-	push	bc		; save unit
-	ld	a,c		; unit to A
-	call	chkdev		; check validity
-	pop	bc		; restore unit
-	ret	nz		; bail out on error
-	
 	; resolve the CBIOS DPH table entry
 	ld	a,(dstdrv)	; dest drv num to A
 	call	chkdrv		; valid drive?
@@ -912,11 +837,10 @@ drvmap5:
 	call	addhl		; adjust HL to point to entry
 	ld	(dstptr),hl	; save it
 ;
-	; shove updated unit/slice into the entry
-	ld	(hl),c		; save unit byte
+	; shove updated device/unit/slice into the entry
+	ld	(hl),c		; save device/unit byte
 	inc	hl		; bump to next byte
-	ld	a,(slice)
-	ld	(hl),a		; save slice
+	ld	(hl),b		; save slice
 ;
 	; finish up
 	ld	a,(dstdrv)	; get the destination drive
@@ -987,7 +911,14 @@ drvmapu1:
 	call	addhl		; adjust HL to point to entry
 	ld	(dstptr),hl	; save it
 ;
-	; shove updated unit/slice into the entry
+;	; verify the drive letter being assigned is a hard disk
+;	ld	a,(hl)		; get the device/unit byte
+;	push	hl		; save pointer
+;	call	chktypu		; check it
+;	pop	hl		; recover pointer
+;	jp	nz,errtyp	; abort with bad device type error
+;
+	; shove updated device/unit/slice into the entry
 	ld	a,(unit)	; get specified unit
 	ld	(hl),a		; save it
 	inc	hl		; next byte is slice
@@ -1009,17 +940,15 @@ showall:
 	ld	c,0		; map index (drive letter)
 ;
 	ld	a,b		; load count
-	or	$FF		; signal no action
+	or	$ff		; signal no action
 	ret	z		; bail out if zero
 ;
 showall1:	; loop
 	ld	a,c		;
-	push	bc		; save loop control
 	call	showass
-	pop	bc		; restore loop control
 	inc	c
 	djnz	showall1
-	or	$FF
+	or	$ff
 	ret
 ;
 ; Display drive letter assignment IF it is assigned
@@ -1033,8 +962,8 @@ showass:
 	rlca
 	rlca
 	call	addhl		; HL = address of drive map table entry
-	ld	a,(hl)		; get unit value
-	cp	$FF		; compare to unassigned value
+	ld	a,(hl)		; get device/unit value
+	cp	$ff		; compare to unassigned value
 	ld	a,c		; recover original drive num
 	ret	z		; bail out if unassigned drive
 	; fall thru to display drive
@@ -1068,15 +997,16 @@ showone:
 	call 	prtchr		; print it
 ;
 	; render the map entry
-	ld	a,(hl)		; load unit
+	ld	a,(hl)		; load device/unit
 	cp	$FF		; empty?
 	ret	z		; yes, bypass
-	push	hl		; preserve HL
 	call	prtdev		; print device mnemonic
-	ld	a,':'		; colon for device/unit format
-	call	prtchr		; print it
-	pop	hl		; recover HL
+	ld	a,(hl)		; load device/unit again
+	and	$0f		; isolate unit num
+	call	prtdecb		; print it
 	inc	hl		; point to slice num
+	ld	a,':'		; colon to separate slice
+	call	prtchr		; print it
 	ld	a,(hl)		; load slice num
 	call	prtdecb		; print it
 ;
@@ -1085,11 +1015,11 @@ showone:
 ; Force BDOS to reset (logout) all drives
 ;
 drvrst:
-	ld	c,$0D		; BDOS Reset Disk function
+	ld	c,$0d		; BDOS Reset Disk function
 	call	bdos		; do it
 ;
 	ld	c,$25		; BDOS Reset Multiple Drives
-	ld	de,$FFFF	; all drives
+	ld	de,$ffff	; all drives
 	call	bdos		; do it
 ;
 	xor	a		; signal success
@@ -1103,16 +1033,11 @@ prtdev:
 	or	a		; set flags
 	ld	a,e		; put device num back
 	jr	nz,prtdevu	; print device in UNA mode
-	ld	b,$17		; hbios func: diodevice
-	ld	c,a		; unit to C
-	rst	08		; call hbios, D := device, E := unit
-	push	de		; save results
-	ld	a,d		; device to A
 	rrca			; isolate high nibble (device)
 	rrca			;   ...
 	rrca			;   ...
 	rrca			;   ... into low nibble
-	and	$0F		; mask out undesired bits
+	and	$0f		; mask out undesired bits
 	push	hl		; save HL
 	add	a,a		; multiple A by two for word table
 	ld	hl,devtbl	; point to start of device name table
@@ -1123,63 +1048,54 @@ prtdev:
 	ld	e,a		;   ...
 	call	prtstr		; print the device nmemonic
 	pop	hl		; restore HL
-	pop	de		; get device/unit data back
-	ld	a,e		; device id to a
-	call	prtdecb		; print it
 	ret			; done
 ;
 prtdevu:
+	ld	e,a		; save unit num in E
 	push	bc
 	push	de
 	push	hl
-;	
 	; UNA mode version of print device
 	ld	b,a		; B := unit num
-	push	bc		; save for later
 	ld	c,$48		; UNA func: get disk type
 	rst	08		; call UNA
 	ld	a,d		; disk type to A
-	pop	bc		; get unit num back in C
+	pop	hl
+	pop	de
+	pop	bc
 ;
-	; pick string based on disk type
 	cp	$40		; RAM/ROM?
 	jr	z,prtdevu1	; if so, handle it
 	cp	$41		; IDE?
 	ld	de,udevide	; load string
-	jr	z,prtdevu2	; if IDE, print and return
+	jp	z,prtstr	; if IDE, print and return
 	cp	$42		; PPIDE?
 	ld	de,udevppide	; load string
-	jr	z,prtdevu2	; if PPIDE, print and return
+	jp	z,prtstr	; if PPIDE, print and return
 	cp	$43		; SD?
 	ld	de,udevsd	; load string
-	jr	z,prtdevu2	; if SD, print and return
+	jp	z,prtstr	; if SD, print and return
 	cp	$44		; DSD?
 	ld	de,udevdsd	; load string
-	jr	z,prtdevu2	; if DSD, print and return
+	jp	z,prtstr	; if DSD, print and return
 	ld	de,udevunk	; load string for unknown
-	jr	prtdevu2	; and print it
+	jp	prtstr		; and print it
 ;
 prtdevu1:
 	; handle RAM/ROM
-	push	bc		; save unit num
+	push	bc
+	push	hl
+	ld	b,e		; unit num to B
 	ld	c,$45		; UNA func: get disk info
 	ld	de,$9000	; 512 byte buffer *** FIX!!! ***
 	rst	08		; call UNA
 	bit	7,b		; test RAM drive bit
-	pop	bc		; restore unit num
-	ld	de,udevrom	; load string
-	jr	z,prtdevu2	; print and return
-	ld	de,udevram	; load string
-	jr	prtdevu2	; print and return
-;
-prtdevu2:
-	call	prtstr		; print the device nmemonic
-	ld	a,b		; get the unit num back
-	call	prtdecb		; append it
 	pop	hl
-	pop	de
 	pop	bc
-	ret
+	ld	de,udevrom	; load string
+	jp	z,prtstr	; print and return
+	ld	de,udevram	; load string
+	jp	prtstr		; print and return
 ;
 ; Check that specified drive num is valid
 ;
@@ -1189,32 +1105,36 @@ chkdrv:
 	cp	a		; set Z to signal good
 	ret			; and return
 ;
-; Check that the unit value in A is valid
+; Check that the device/unit value in A is valid
 ; according to active BIOS support.
 ;
 ;
 chkdev:		; HBIOS variant
-	push	af		; save incoming unit
-	ld	b,$F8		; hbios func: sysget
-	ld	c,$10		; sysget subfunc: diocnt
-	rst	08		; call hbios, E := device count
-	pop	af		; restore incoming unit
-	cp	e		; compare to unit count
-	jp	nc,errdev	; if too high, error
+	push	af		; save incoming device/unit
+	ld	b,$1a		; hbios func: diodevcnt
+	rst	08		; call hbios, device count to B
+	ld	c,0		; use C for device index
+	pop	af		; restore incoming device/unit
+chkdev1:
+	push	bc		; preserve loop control
+	push	af		; save incoming device/unit
+	ld	b,$1b		; hbios func: diodevinf
+	rst	08		; call hbios, return device/unit in C
+	pop	af		; restore incoming device/unit
+	cp	c		; match to device/unit from BIOS list?
+	pop	bc		; restore loop control
+	jr	z,chkdev2	; yes, match
+	inc	c		; next device list entry
+	djnz	chkdev1		; loop as needed
+	jp	errdev		; no match, handle error
 ;
-	; get device/unit info
-	ld	b,$17		; hbios func: diodevice
-	ld	c,a		; unit to C
-	rst	08		; call hbios, D := device, E := unit
-	ld	a,d		; device to A
-;
-	; check slice support
+chkdev2:	; check slice support
 	cp	$30		; A has device/unit, in hard disk range?
-	jr	c,chkdev1	; if not hard disk, check slice val
+	jr	c,chkdev3	; if not hard disk, check slice val
 	xor	a		; otherwise, signal OK
 	ret
 ;
-chkdev1:	; not a hard disk, make sure slice == 0
+chkdev3:	; not a hard disk, make sure slice == 0
 	ld	a,(slice)	; get specified slice
 	or	a		; set flags
 	jp	nz,errslc	; invalid slice error
@@ -1328,7 +1248,7 @@ hexascii:
 ; Convert low nibble of A to ascii hex
 ;
 hexconv:
-	and	$0F	     	; low nibble only
+	and	$0f	     	; low nibble only
 	add	a,$90
 	daa	
 	adc	a,$40
@@ -1422,7 +1342,7 @@ delim:	or	a
 	ret	z
 	cp	':'		; colon
 	ret	z
-	cp	$3B		; semicolon
+	cp	$3b		; semicolon
 	ret	z
 	cp	'<'		; less than
 	ret	z
@@ -1520,14 +1440,14 @@ strcmp:
 ; The CBIOS function offset must be stored in the byte
 ; following the call instruction.  ex:
 ;	call	cbios
-;	.db	$0C		; offset of CONOUT CBIOS function
+;	.db	$0c		; offset of CONOUT CBIOS function
 ;
 cbios:
 	ex	(sp),hl
 	ld	a,(hl)		; get the function offset
 	inc	hl		; point past value following call instruction
 	ex	(sp),hl		; put address back at top of stack and recover HL
-	ld	hl,(bioloc)	; address of CBIOS function table to HL
+	ld	hl,(cbftbl)	; address of CBIOS function table to HL
 	call	addhl		; determine specific function address
 	jp	(hl)		; invoke CBIOS
 ;
@@ -1623,20 +1543,16 @@ err1:	; without the leading crlf
 ;
 err2:	; without the string
 ;	call	crlf		; print newline
-	or	$FF		; signal error
+	or	$ff		; signal error
 	ret			; done
 ;
 ;===============================================================================
 ; Storage Section
 ;===============================================================================
 ;
-;
-bioloc	.dw	0		; CBIOS starting address
-bioend	.dw	0		; CBIOS ending address
-biosiz	.dw	0		; CBIOS size (in bytes)
+cbftbl	.dw	0		; address of CBIOS function table
 maploc	.dw	0		; location of CBIOS drive map table
 dpbloc	.dw	0		; location of CBIOS DPB map table
-;
 drives:
 dstdrv	.db	0		; destination drive
 srcdrv	.db	0		; source drive
@@ -1644,7 +1560,7 @@ device	.db	0		; source device
 unit	.db	0		; source unit
 slice	.db	0		; source slice
 ;
-unamod	.db	0		; $FF indicates UNA UBIOS active
+unamod	.db	0		; $ff indicates UNA UBIOS active
 modcnt	.db	0		; count of drive map modifications
 ;
 srcptr	.dw	0		; source pointer for copy
@@ -1652,9 +1568,7 @@ dstptr	.dw	0		; destination pointer for copy
 tmpent	.fill	4,0		; space to save a table entry
 tmpstr	.fill	9,0		; temporary string of up to 8 chars, zero term
 ;
-heaptop	.dw	0		; current address of top of heap memory
-heaplim	.dw	0		; heap limit address
-;
+buftop	.dw	0		; memory allocation buffer top
 dirbuf	.dw	0		; directory buffer location
 ;
 mapwrk	.fill	(4 * 16),$FF	; working copy of drive map
@@ -1701,10 +1615,10 @@ stack	.equ	$		; stack top
 ; Messages
 ;
 indent	.db	"   ",0
-msgban1	.db	"ASSIGN v1.0c for RomWBW CP/M 2.2, 21-Apr-2016",0
+msgban1	.db	"ASSIGN v1.0 for RomWBW CP/M 2.2, 19-Sep-2014",0
 msghb	.db	" (HBIOS Mode)",0
 msgub	.db	" (UBIOS Mode)",0
-msgban2	.db	"Copyright 2016, Wayne Warthen, GNU GPL v3",0
+msgban2	.db	"Copyright 2014, Wayne Warthen, GNU GPL v3",0
 msguse	.db	"Usage: ASSIGN D:[=[{D:|<device>[<unitnum>]:[<slicenum>]}]][,...]",13,10
 	.db	"  ex. ASSIGN           (display all active assignments)",13,10
 	.db	"      ASSIGN /?        (display version and usage)",13,10
@@ -1729,4 +1643,4 @@ msgnoa	.db	"Drive A: is unassigned, aborting!",0
 msgdos	.db	"DOS error, return code=0x",0
 msgmem	.db	" Disk Buffer Bytes Free",0
 ;
-	.end
+	.end

Source/Apps/Build.cmd

@@ -15,17 +15,13 @@ call :asm SysCopy || goto :eof
 call :asm Assign || goto :eof
 call :asm Format || goto :eof
 call :asm Talk || goto :eof
-call :asm OSLdr || goto :eof
-call :asm Mode || goto :eof
 
 zx Z80ASM -SYSGEN/F
 
-setlocal & cd XM125 && call Build || exit /b 1 & endlocal
-
 goto :eof
 
 :asm
 echo.
 echo Building %1...
-tasm -t80 -g3 -fFF %1.asm %1.com %1.lst
+tasm -t80 -b -g3 -fFF %1.asm %1.com %1.lst
 goto :eof

Source/Apps/Clean.cmd

@@ -1,8 +1,4 @@
 @echo off
-setlocal
-
 if exist *.bin del *.bin
 if exist *.com del *.com
-if exist *.lst del *.lst
-
-setlocal & cd XM125 && call Clean || exit /b 1 & endlocal
+if exist *.lst del *.lst

Source/Apps/Decode.asm

@@ -1,79 +0,0 @@
-;
-;==================================================================================================
-; DECODE 32-BIT VALUES FROM A 5-BIT SHIFT-ENCODED VALUE
-;==================================================================================================
-;
-;   Copyright (C) 2014 John R. Coffman.  All rights reserved.
-;   Provided for hobbyist use on the Z180 SBC Mark IV board.
-;
-; This program is free software: you can redistribute it and/or modify
-; it under the terms of the GNU General Public License as published by
-; the Free Software Foundation, either version 3 of the License, or
-; (at your option) any later version.
-;
-; This program is distributed in the hope that it will be useful,
-; but WITHOUT ANY WARRANTY; without even the implied warranty of
-; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-; GNU General Public License for more details.
-;
-; You should have received a copy of the GNU General Public License
-; along with this program.  If not, see <http://www.gnu.org/licenses/>.
-;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;
-; THE FUNCTION(S) IN THIS FILE ARE BASED ON LIKE FUNCTIONS CREATED BY JOHN COFFMAN
-; IN HIS UNA BIOS PROJECT.  THEY ARE INCLUDED HERE BASED ON GPLV3 PERMISSIBLE USE.
-;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;
-; An encoded value (V) is defined as V = C * 2^X * 3^Y
-; where C is a prearranged constant, X is 0 or 1 and Y is 0-15
-; The encoded value is stored as 5 bits: YXXXX
-; At present, C=75 for baud rate encoding and C=3 for CPU OSC encoding
-;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;  DECODE
-;
-; Enter with:
-;	HL	=  word to be decoded (5-bits)    FXXXX
-;		   F=extra 3 factor, XXXX=shift factor, reg H must be zero
-;	DE	=  encode divisor OSC_DIV = 3, or BAUD_DIV = 75
-;
-; Exit with:
-;	DE:HL	=  decoded value
-;       A	=  non-zero on error
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;
-decode:
-	ld	a,h			; set to test
-	ld	c,$ff			; presume error condition
-	or	a			; test for zero
-	jr	nz,decode9		; not an encoded value
-	ld	a,l			; get low order 5 bits
-	cp	32			; test for error
-	jr	nc,decode9		; error return if not below
-	; argument hl is validated
-	ld	h,d
-	ld	l,e			; copy to hl
-	cp	16	
-	jr	c,decode2		; if < 16, no 3 factor
-	add	hl,de			; introduce factor of 3
-	add	hl,de			; **
-decode2:	
-	ld	de,0			; zero the high order
-	and	15			; mask to 4 bits
-	jr	z,decode8		; good exit
-	ld	c,b			; save b-reg
-	ld	b,a			;
-decode3:	
-	add	hl,hl			; shift left by 1, set carry
-	rl	e	
-	rl	d			; **
-	djnz	decode3	
-	ld	b,c			; restore b-reg
-decode8:	
-	ld	c,0			; signal good return
-decode9:	
-	ld	a,c			; error code test
-	or	a			; error code in reg-c and z-flag
-	ret

Source/Apps/Encode.asm

@@ -1,75 +0,0 @@
-;
-;==================================================================================================
-; ENCODE 32-BIT VALUES TO A 5-BIT SHIFT-ENCODED VALUE
-;==================================================================================================
-;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;
-; An encoded value (V) is defined as V = C * 2^X * 3^Y
-; where C is a prearranged constant, Y is 0 or 1 and X is 0-15
-; The encoded value is stored as 5 bits: YXXXX
-; At present, C=75 for baud rate encoding and C=3 for CPU OSC encoding
-;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;  ENCODE
-;
-; Enter with:
-;	DE:HL	=  dword value to be encoded
-;	C	=  divisor (0 < C < 256)
-;		   encode divisor OSC_DIV = 3, or BAUD_DIV = 75
-;
-; Exit with:
-;	C	=  encoded value
-;       A	=  non-zero on error
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;
-encode:
-	; incoming value of zero is a failure
-	call	encode5			; test DE:HL for zero
-	jr	z,encode4		; if zero, failure return
-;
-	; apply encoding divisor
-	call	div32x8			; DE:HL / C (remainder in A)
-	or	a			; set flags to test for zero
-	ret	nz			; error if not evenly divisible
-;
-	; test divide by 3 to see if it is possible
-	push	de			; save working
-	push	hl			; ... value
-	ld	c,3			; divide by 3
-	call	div32x8			; ... test
-	pop	hl			; restore working
-	pop	de			; ... value
-;
-	; implmement divide by 3 if possible
-	ld	c,$00			; init result in c w/ div 3 flag clear
-	or	a			; set flags to test for remainder
-	jr	nz,encode2		; jump if it failed
-;
-	; if divide by 3 worked, do it again for real
-	ld	c,3			; setup to divide by 3 again
-	call	div32x8			; do it
-	ld	c,$10			; init result in c w/ div 3 flag set
-;
-encode2:
-	; loop to determine power of 2
-	ld	b,16			; can only represent up to 2^15
-encode3:
-	srl	d			; right shift de:hl into carry
-	rr	e			; ...
-	rr	h			; ...
-	rr	l			; ...
-	jr	c,encode5		; if carry, then done, c has result
-	inc	c			; bump the result value
-	djnz	encode3			; keep shifting if possible
-encode4:
-	or	$ff			; signal error
-	ret				; and done
-;
-encode5:
-	; test de:hl for zero (sets zf, clobbers a)
-	ld	a,h
-	or	l
-	or	d
-	or	e
-	ret				; ret w/ Z set if DE:HL == 0

Source/Apps/Format.asm

@@ -5,210 +5,24 @@
 ;	AUTHOR:  WAYNE WARTHEN (wwarthen@gmail.com)
 ;_______________________________________________________________________________
 ;
-; Usage:
-;   FORMAT D:
-;     ex: FORMAT		(display version and usage)
-;         FORMAT /?		(display version and usage)
-;         FORMAT C:		(format drive C:)
+; CHANGELOG:
 ;_______________________________________________________________________________
 ;
-; Change Log:
+; TODO:
+;
 ;_______________________________________________________________________________
 ;
-; ToDo:
-;  1) Actually implement this
-;_______________________________________________________________________________
 ;
 ;===============================================================================
-; Definitions
+; MAIN PROGRAM PROCEDURE
 ;===============================================================================
 ;
-stksiz	.equ	$40		; Working stack size
+	.ORG	00100H
+	RET
 ;
-restart	.equ	$0000		; CP/M restart vector
-bdos	.equ	$0005		; BDOS invocation vector
-;;
-;stamp	.equ	$40		; loc of RomWBW CBIOS zero page stamp
+STACKSAV	.DW	0
+STACKSIZ	.EQU	40H		; WE ARE A STACK PIG
+		.FILL	STACKSIZ,0
+STACK		.EQU	$
 ;
-rmj	.equ	2		; CBIOS version - major
-rmn	.equ	8		; CBIOS version - minor
-;
-;===============================================================================
-; Code Section
-;===============================================================================
-;
-;
-	.org	$100
-;
-	; setup stack (save old value)
-	ld	(stksav),sp	; save stack
-	ld	sp,stack	; set new stack
-;
-	; initialization
-	call	init		; initialize
-	jr	nz,exit		; abort if init fails
-;
-	; do the real work 
-	call	process		; parse and process command line
-	jr	nz,exit		; done if error or no action
-;
-exit:	; clean up and return to command processor
-	call	crlf		; formatting
-	ld	sp,(stksav)	; restore stack
-	jp	restart		; return to CP/M via restart
-	ret			; return to CP/M w/o restart
-;
-; Initialization
-;
-init:
-;
-	; locate start of cbios (function jump table)
-	ld	hl,(restart+1)	; load address of CP/M restart vector
-	ld	de,-3		; adjustment for start of table
-	add	hl,de		; HL now has start of table
-	ld	(bioloc),hl	; save it
-;
-	; check for UNA (UBIOS)
-	ld	a,($FFFD)	; fixed location of UNA API vector
-	cp	$C3		; jp instruction?
-	jr	nz,initx	; if not, not UNA
-	ld	hl,($FFFE)	; get jp address
-	ld	a,(hl)		; get byte at target address
-	cp	$FD		; first byte of UNA push ix instruction
-	jr	nz,initx	; if not, not UNA
-	inc	hl		; point to next byte
-	ld	a,(hl)		; get next byte
-	cp	$E5		; second byte of UNA push ix instruction
-	jr	nz,initx	; if not, not UNA
-	ld	hl,unamod	; point to UNA mode flag
-	ld	(hl),$FF	; set UNA mode flag
-;
-initx:
-;
-	xor	a
-	ret
-;
-; Process command line
-;
-process:
-	jr	usage
-;
-	xor	a
-	ret
-;
-usage:
-;
-	call	crlf		; formatting
-	ld	de,msgban1	; point to version message part 1
-	call	prtstr		; print it
-	ld	a,(unamod)	; get UNA flag
-	or	a		; set flags
-	ld	de,msghb	; point to HBIOS mode message
-	call	z,prtstr	; if not UNA, say so
-	ld	de,msgub	; point to UBIOS mode message
-	call	nz,prtstr	; if UNA, say so
-	call	crlf		; formatting
-	ld	de,msgban2	; point to version message part 2
-	call	prtstr		; print it
-	call	crlf2		; blank line
-	ld	de,msguse	; point to usage message
-	call	prtstr		; print it
-	xor	a		; signal success
-	ret			; and return
-;
-; Print character in A without destroying any registers
-;
-prtchr:
-	push	bc		; save registers
-	push	de
-	push	hl
-	ld	e,a		; character to print in E
-	ld	c,$02		; BDOS function to output a character
-	call	bdos		; do it
-	pop	hl		; restore registers
-	pop	de
-	pop	bc
-	ret
-;
-; Print a zero terminated string at (HL) without destroying any registers
-;
-prtstr:
-	push	de
-;
-prtstr1:
-	ld	a,(de)		; get next char
-	or	a
-	jr	z,prtstr2
-	call	prtchr
-	inc	de
-	jr	prtstr1
-;
-prtstr2:
-	pop	de		; restore registers
-	ret	
-;
-; Start a new line
-;
-crlf2:
-	call	crlf		; two of them
-crlf:
-	push	af		; preserve AF
-	ld	a,13		; <CR>
-	call	prtchr		; print it
-	ld	a,10		; <LF>
-	call	prtchr		; print it
-	pop	af		; restore AF
-	ret
-;
-; Invoke CBIOS function
-; The CBIOS function offset must be stored in the byte
-; following the call instruction.  ex:
-;	call	cbios
-;	.db	$0C		; offset of CONOUT CBIOS function
-;
-cbios:
-	ex	(sp),hl
-	ld	a,(hl)		; get the function offset
-	inc	hl		; point past value following call instruction
-	ex	(sp),hl		; put address back at top of stack and recover HL
-	ld	hl,(bioloc)	; address of CBIOS function table to HL
-	call	addhl		; determine specific function address
-	jp	(hl)		; invoke CBIOS
-;
-; Add the value in A to HL (HL := HL + A)
-;
-addhl:
-	add	a,l		; A := A + L
-	ld	l,a		; Put result back in L
-	ret	nc		; if no carry, we are done
-	inc	h		; if carry, increment H
-	ret			; and return
-;
-; Jump indirect to address in HL
-;
-jphl:
-	jp	(hl)
-;
-;===============================================================================
-; Storage Section
-;===============================================================================
-;
-bioloc	.dw	0		; CBIOS starting address
-;
-unamod	.db	0		; $FF indicates UNA UBIOS active
-;
-stksav	.dw	0		; stack pointer saved at start
-	.fill	stksiz,0	; stack
-stack	.equ	$		; stack top
-;
-msgban1	.db	"FORMAT v0.1 for RomWBW CP/M 2.2, 24-Apr-2016",0
-msghb	.db	" (HBIOS Mode)",0
-msgub	.db	" (UBIOS Mode)",0
-msgban2	.db	"Copyright 2016, Wayne Warthen, GNU GPL v3",0
-msguse	.db	"FORMAT command is not yet implemented!",13,10,13,10
-	.db	"Use FD command to physically format floppy diskettes",13,10
-	.db	"Use CLRDIR command to (re)initialize directories",13,10
-	.db	"Use SYSCOPY command to make disks bootable",13,10
-	.db	"Use FDISK80 command to partition mass storage media",0
-;
-	.end
+		.END

Source/Apps/SysCopy.asm

@@ -15,7 +15,6 @@
 ;_______________________________________________________________________________
 ;
 ; Change Log:
-;   2016-04-24 [WBW] Updated to preserve MBR partition table
 ;_______________________________________________________________________________
 ;
 ; ToDo:
@@ -32,8 +31,7 @@ stksiz	.equ	$40		; we are a stack pig
 restart	.equ	$0000		; CP/M restart vector
 bdos	.equ	$0005		; BDOS invocation vector
 ;
-imgbuf	.equ	$900		; load point for system image (from original SYSGEN)
-mbrbuf	.equ	imgbuf+$4000	; load point for MBR storage
+buf	.equ	$900		; load point for system image (from original SYSGEN)
 ;
 ;===============================================================================
 ; Code Section
@@ -144,16 +142,16 @@ confirm:
 	ld	de,sconf3
 	call	prtstr
 ;
-	; get input (imgbuf is used for temp storage)
+	; get input
 	ld	c,$0A		; get console buffer
-	ld	de,imgbuf		; into buf
+	ld	de,buf		; into buf
 	ld	a,1		; max of 1 character
 	ld	(de),a		; set up buffer
 	call	bdos		; invoke BDOS
-	ld	a,(imgbuf+1)	; get num chars entered
+	ld	a,(buf+1)	; get num chars entered
 	dec	a		; check that we got exactly one char
 	jr	nz,confirm	; bad input, re-prompt
-	ld	a,(imgbuf+2)	; get the character
+	ld	a,(buf+2)	; get the character
 	and	$DF		; force upper case
 	cp	'Y'		; compare to Y
 	ret			; return with Z set appropriately
@@ -192,7 +190,7 @@ rdfil:
 	ld	(rwfun),a	; save bdos function
 	ld	a,12		; start with 1536 byte header (12 records)
 	ld	(reccnt),a	; init record counter
-	ld	hl,imgbuf	; start of buffer
+	ld	hl,buf		; start of buffer
 	ld	(bufptr),hl	; init buffer pointer
 	call	rwfil		; read the header
 	ret	nz		; abort on error (no need to close file)
@@ -239,7 +237,7 @@ wrfil1:	; create target file
 	ld	(rwfun),a	; save bdos function
 	ld	a,(imgsiz)	; number of records to read
 	ld	(reccnt),a	; init record counter
-	ld	hl,imgbuf	; start of buffer
+	ld	hl,buf		; start of buffer
 	ld	(bufptr),hl	; init buffer pointer
 	call	rwfil		; do it
 	ret	nz		; abort on error
@@ -331,36 +329,7 @@ wrdsk:
 	; force return to go through disk reset
 	ld	hl,resdsk	; load address of reset disk routine
 	push	hl		; and put it on the stack
-	; setup to read existing MBR
-	ld	a,(destfcb)	; get the drive
-	dec	a		; adjust for zero indexing
-	call	setdsk		; setup disk
-	ret	nz		; abort on error
-	ld	hl,mbrbuf	; override to read
-	ld	(bufptr),hl	; ... into MBR buffer
-	ld	a,4		; 4 records = 1 512 byte sector
-	; set function to read
-	ld	hl,(cbftbl)	; get address of CBIOS function table
-	ld	a,$27		; $27 is CBIOS READ entry offset
-	call	addhl		; set HL to resultant entry point
-	ld	(actfnc),hl	; save it
-	; read the existing MBR into memory
-	call	rwdsk		; read the sector
-	ret	nz		; abort on error
-	; test for valid partition table ($55, $AA at offset $1FE)
-	ld	hl,(mbrbuf+$1FE); HL := signature
-	ld	a,$55		; load expected value of first byte
-	cp	l		; check for proper value
-	jr	nz,wrdsk1	; mismatch, ignore old partition table
-	ld	a,$AA		; load expected value of second byte
-	cp	h		; check for proper value
-	jr	nz,wrdsk1	; mismatch, ignore old partition table
-	; valid MBR, copy existing partition table over to new image
-	ld	hl,mbrbuf+$1BE	; copy from MBR offset of existing MBR
-	ld	de,imgbuf+$1BE	; copy to MBR offset of new image
-	ld	bc,$40		; size of MBR
-	ldir			; do it
-wrdsk1:	; setup to write the image from memory to disk
+	; set drive for subsequent writes
 	ld	a,(destfcb)	; get the drive
 	dec	a		; adjust for zero indexing
 	call	setdsk		; setup disk
@@ -427,7 +396,7 @@ setdsk:
 	ld	hl,0
 	ld	(acttrk),hl	; active track := 0
 	ld	(actsec),hl	; active sector := 0
-	ld	hl,imgbuf	; assume r/w to image buffer
+	ld	hl,buf
 	ld	(bufptr),hl	; reset buffer pointer
 ;
 	xor	a		; signal success
@@ -489,14 +458,14 @@ jphl:	jp	(hl)		; indirect jump
 ;
 chkhdr:
 	; check signature
-	ld	hl,(imgbuf+$580)	; get signature
+	ld	hl,(buf+$580)	; get signature
 	ld	de,$A55A	; signature value
 	or	a		; clear CF
 	sbc	hl,de		; compare
 	jp	nz,errsig	; invalid signature
 	; compute the image size (does not include size of header)
-	ld	hl,(imgbuf+$5FC)	; get CPM_END
-	ld	de,(imgbuf+$5FA)	; get CPM_LOC
+	ld	hl,(buf+$5FC)	; get CPM_END
+	ld	de,(buf+$5FA)	; get CPM_LOC
 	or	a		; clear CF
 	sbc	hl,de		; image size := CPM_END - CPM_LOC
 	xor	a		; signal success

Source/Apps/XM125/Build.cmd

@@ -1,19 +0,0 @@
-@echo off
-setlocal
-
-set TOOLS=..\..\..\Tools
-
-set PATH=%TOOLS%\zx;%PATH%
-
-set ZXBINDIR=%TOOLS%\cpm\bin\
-set ZXLIBDIR=%TOOLS%\cpm\lib\
-set ZXINCDIR=%TOOLS%\cpm\include\
-
-zx mac xmdm125
-zx slr180 -xmhb/HF
-zx mload25 XM=xmdm125,xmhb
-
-rem set PROMPT=[Build] %PROMPT%
-rem %comspec%
-
-move /Y XM.com ..

Source/Apps/XM125/Clean.cmd

@@ -1,7 +0,0 @@
-@echo off
-setlocal
-
-if exist *.hex del *.hex
-if exist *.prn del *.prn
-if exist *.lst del *.lst
-if exist xm.com del xm.com

Source/Apps/XM125/xmhb.180

@@ -1,361 +0,0 @@
-;=======================================================================
-;
-; XMHB.Z80 - XMODEMXX PATCH FILE FOR ROMWBW HBIOS
-;
-;   Wayne Warthen - wwarthen@gmail.com
-;   Updated: 2017-08-09
-;
-;=======================================================================
-;
-; Overlay file is Z80, build with M80:
-;   M80 =XMHB
-;   L80 XMHB,XMHB/N/X/E
-;
-	.Z80
-	ASEG
-;
-NO	EQU	0
-YES	EQU	NOT NO
-;
-ERRDET	EQU	NO		; detect parity/framing/overrun errs
-;
-BASE	EQU	100H		; start of cp/m normal program area
-;
-;=======================================================================
-;
-; Jump table: The jump table must be in exactly the same sequence as the
-; one in XMODEM.  Note the ORG of 103H - This jump table has no jump to
-; 'BEGIN'.
-;
-	ORG	BASE + 3	;start after 'JMP BEGIN'
-;
-	JP	CONOUT		;must be 00000h if not used, see below
-	JP	MINIT		;initialization routine (if needed)
-	JP	UNINIT		;undo whatever 'MINIT' did (or return)
-JPTBL:
-	JP	SENDR		;send character (via pop psw)
-	JP	CAROK		;test for carrier
-	JP	MDIN		;receive data byte
-	JP	GETCHR		;get character from modem
-	JP	RCVRDY		;check receive ready
-	JP	SNDRDY		;check send ready
-	JP	SPEED		;get speed value for file transfer time
-	JP	EXTRA1		;extra for custom routine
-	JP	EXTRA2		;extra for custom routine
-	JP	EXTRA3		;extra for custom routine
-;
-;-----------------------------------------------------------------------
-;
-; Output character to console
-;
-CONOUT	EQU	0		; not used
-;
-;-----------------------------------------------------------------------
-;
-; Initialize modem
-;
-; This procedure has been usurped to dynamically detect the type
-; of system we are running on and install the *real* jump table
-; entries as appropriate.
-;
-MINIT:
-	; Get system type
-	LD	D,2
-	LD	E,2
-	MLT	DE
-	BIT	2,E		; bit 2 wil be set if mlt happend
-	LD	HL,U_JPTBL	; assume Z80 (UART)
-	LD	A,10		; assume 10MHz CPU in case of Z80
-	JR	Z,MINIT2	; yes, Z80, do vector copy
-	LD	HL,A_JPTBL	; otherwise Z180 (ASCI)
-	LD	A,20		; assume 20MHz CPU in case of Z180
-;
-MINIT2:
-	; Copy real vectors into active jump table
-	LD	DE,JPTBL
-	LD	BC,7 * 3	; copy 7 3-byte entries
-	LDIR
-;
-	; Check for UNA (UBIOS)
-	LD	A,(0FFFDH)	; fixed location of UNA API vector
-	CP	0C3H		; jp instruction?
-	JR	NZ,MINIT3	; if not, not UNA
-	LD	HL,(0FFFEH)	; get jp address
-	LD	A,(HL)		; get byte at target address
-	CP	0FDH		; first byte of UNA push ix instruction
-	JR	NZ,MINIT3	; if not, not UNA
-	INC	HL		; point to next byte
-	LD	A,(HL)		; get next byte
-	CP	0E5H		; second byte of UNA push ix instruction
-	JR	NZ,MINIT3	; if not, not UNA
-;
-	; Get CPU speed from UNA
-	LD	C,0F8H		; UNA BIOS Get PHI function
-	RST	08		; Returns speed in Hz in DE:HL
-	LD	A,E		; Hack to get approx speed in MHz
-	SRL	A		; ... by dividing by 1,048,576
-	SRL	A		; ...
-	SRL	A		; ...
-	SRL	A		; ...
-	INC	A		; Fix up for value truncation
-	RET			; done
-;
-MINIT3:
-	; Not UNA, use HBIOS for CPU speed lookup
-	LD	B,0F8H		; HBIOS SYSGET function 0xF8
-	LD	C,0F0H		; CPUINFO subfunction 0xF0
-	RST	08		; do it, L := CPU speed in MHz
-	LD	A,L		; move it to A
-	RET			; done
-;
-;-----------------------------------------------------------------------
-;
-; Uninitialize modem
-;
-UNINIT:
-	RET			; not initialized, so no 'UN-INITIALIZE'
-;
-;-----------------------------------------------------------------------
-;
-; The following are all dummy routines that are unused because MINIT
-; dynamically installs the real jump table.
-;
-SENDR:
-CAROK:
-MDIN:
-GETCHR:
-RCVRDY:
-SNDRDY:
-SPEED:
-EXTRA1:
-EXTRA2:
-EXTRA3:
-	RET
-;
-;=======================================================================
-;=======================================================================
-;
-; Standard RBC Projects 8250-like UART port @ 68H
-;
-; Will be used for all RBC Z80 systems.
-;
-;=======================================================================
-;=======================================================================
-;
-; UART port constants
-;
-U_BASE	EQU	68H		; UART base port
-U_DATP	EQU	U_BASE + 0	; data in port
-U_DATO	EQU	U_BASE + 0	; data out port
-U_CTLP	EQU	U_BASE + 5	; control/status port
-U_SNDB	EQU	20H		; bit to test for send ready
-U_SNDR	EQU	20H		; value when ready to send
-U_RCVB	EQU	01H		; bit to test for receive ready
-U_RCVR	EQU	01H		; value when ready to receive
-U_PARE	EQU	04H		; bit for parity error
-U_OVRE	EQU	02H		; bit for overrun error
-U_FRME	EQU	08H		; bit for framing error
-;
-; Following jump table is dynamically patched into real jump
-; table at program startup.  See MINIT above.  Note that only a
-; subset of the jump table is overlaid (SENDR to SPEED).
-;
-U_JPTBL:
-	JP	U_SENDR		; send character (via pop psw)
-	JP	U_CAROK		; test for carrier
-	JP	U_MDIN		; receive data byte
-	JP	U_GETCHR	; get character from modem
-	JP	U_RCVRDY	; check receive ready
-	JP	U_SNDRDY	; check send ready
-	JP	U_SPEED		; get speed value for file transfer time
-;
-;-----------------------------------------------------------------------
-;
-; Send character on top of stack
-;
-U_SENDR:
-	POP	AF		; get character to send from stack
-	OUT	(U_DATO),A	; send to port
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Test and rep;ort carrier status, Z set if carrier present
-;
-U_CAROK:
-	XOR	A		; not used, always indicate present
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Get a character (assume character ready has already been tested)
-;
-U_MDIN:
-U_GETCHR:
-	IN	A,(U_DATP)	; read character from port
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Test for character ready to receive, Z = ready
-; Error code returned in A register
-; *** Error code does not seem to be used ***
-;
-U_RCVRDY:
-	IN	A,(U_CTLP)	; get modem status
-;
-	 IF ERRDET
-;
-	; With error detection (slower)
-	PUSH	BC		; save scratch register
-	PUSH	AF		; save full status on stack
-	AND	U_FRME | U_OVRE | U_PARE ; isolate line err bits
-	LD	B,A		; save err status in B
-	POP	AF		; get full status back
-	AND	U_RCVB		; isolate ready bit
-	CP	U_RCVR		; test it (set flags)
-	LD	A,B		; get the error code back
-	POP	BC		; restore scratch register
-;
-	 ELSE
-;
-	; No error detection (faster)
-	AND	U_RCVB		; isolate ready bit
-	CP	U_RCVR		; test it (set flags)
-	LD	A,0		; report no line errors
-;
-	 ENDIF
-;
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Test for ready to send a character, Z = ready
-;
-U_SNDRDY:
-	IN	A,(U_CTLP)	; get status
-	AND	U_SNDB		; isolate transmit ready bit
-	CP	U_SNDR		; test for ready value
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Report baud rate (index into SPTBL returned in regsiter A)
-;
-U_SPEED:
-	LD	A,8		; arbitrarily return 9600 baud
-	RET
-;
-;=======================================================================
-;=======================================================================
-;
-; Standard RBC Projects Z180 primary ASCI port
-;
-; Will be used for all RBC Z180 systems.
-;
-;=======================================================================
-;=======================================================================
-;
-; ASCI port constants
-;
-A_DATP	EQU	48H		;Z180 TSR - ASCI receive data port
-A_DATO	EQU	46H		;Z180 TDR - ASCI transmit data port
-A_CTLP	EQU	44H		;Z180 STAT - ASCI status port
-A_CTL2	EQU	40H		;Z180 CNTLA - ASCI control port
-A_SNDB	EQU	02H		;Z180 STAT:TDRE - xmit data reg empty bit
-A_SNDR	EQU	02H		;Z180 STAT:TDRE - xmit data reg empty value
-A_RCVB	EQU	80H		;Z180 STAT:RDRF - rcv data reg full bit
-A_RCVR	EQU	80H		;Z180 STAT:RDRF - rcv data reg full value
-A_PARE	EQU	20H		;Z180 STAT:PE - parity error bit
-A_OVRE	EQU	40H		;Z180 STAT:OVRN - overrun error bit
-A_FRME	EQU	10H		;Z180 STAT:FE - framing error bit
-;
-; Following jump table is dynamically patched over initial jump
-; table at program startup.  See MINIT above.  Note that only a
-; subset of the jump table is overlaid (SENDR to SPEED).
-;
-A_JPTBL:
-	JP	A_SENDR		;send character (via pop psw)
-	JP	A_CAROK		;test for carrier
-	JP	A_MDIN		;receive data byte
-	JP	A_GETCHR	;get character from modem
-	JP	A_RCVRDY	;check receive ready
-	JP	A_SNDRDY	;check send ready
-	JP	A_SPEED		;get speed value for file transfer time
-;
-;-----------------------------------------------------------------------
-;
-; Send character on top of stack
-;
-A_SENDR:
-	POP	AF		; get character to send from stack
-	OUT0	(A_DATO),A	; send to port
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Test and rep;ort carrier status, Z set if carrier present
-;
-A_CAROK:
-	XOR	A		; not used, always indicate present
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Get a character (assume character ready has already been tested)
-;
-A_MDIN:
-A_GETCHR:
-	IN0	A,(A_DATP)	; read character from port
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Test for character ready to receive, Z = ready
-; Error code returned in A register
-; *** Error code does not seem to be used ***
-;
-A_RCVRDY:
-	IN0	A,(A_CTLP)	; get modem status
-	PUSH	BC		; save scratch register
-	PUSH	AF		; save full status on stack
-	AND	A_FRME | A_OVRE | A_PARE ; isolate line err bits
-	LD	B,A		; save err status in B
-	
-	; Z180 ASCI ports will stall if there are errors.
-	; Error bits are NOT cleared by merely reading
-	; the status register.  Below, bit 3 of ASCI
-	; control register is written with a zero to 
-	; clear error(s) if needed.
-	JP	Z,A_RCVRDY2	; if no errs, continue
-	IN0	A,(A_CTL2)	; get current control register
-	AND	0F7H		; force err reset bit to zero
-	OUT0	(A_CTL2),A	; write control register
-
-A_RCVRDY2:
-	POP	AF		; get full status back
-	AND	A_RCVB		; isolate ready bit
-	CP	A_RCVR		; test it (set flags)
-	LD	A,B		; get the error code back
-	POP	BC		; restore scratch register
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Test for ready to send a character, Z = ready
-;
-A_SNDRDY:
-	IN	A,(A_CTLP)	; get status
-	AND	A_SNDB		; isolate transmit ready bit
-	CP	A_SNDR		; test for ready value
-	RET
-;
-;-----------------------------------------------------------------------
-;
-; Report baud rate (index into SPTBL returned in regsiter A)
-;
-A_SPEED:
-	LD	A,8		; arbitrarily return 9600 baud
-	RET
-;
-	END

Source/Apps/bcd.asm

@@ -1,104 +0,0 @@
-;;
-;; make a bcd number from a binary number
-;; 32 bit binary number in hl:bc, result stored at (de)
-;; de is preserved, all other regs destroyed
-;;
-;bin2bcd:
-;	push	ix		; save ix
-;	push	bc		; move bc
-;	pop	ix		; ... to ix
-;	ld	c,32		; loop for 32 bits of binary dword
-;;
-;bin2bcd0:
-;	; outer loop (once for each bit in binary number)	
-;	ld	b,5		; loop for 5 bytes of result
-;	push	de		; save de
-;	add	ix,ix		; left shift next bit from hl:ix
-;	adc	hl,hl		; ... into carry
-;;
-;bin2bcd1:
-;	; inner loop (once for each byte of bcd number)
-;	ld	a,(de)		; get it
-;	adc	a,a		; double it w/ carry
-;	daa			; decimal adjust
-;	ld	(de),a		; save it
-;	inc	de		; point to next bcd byte
-;	djnz	bin2bcd1	; loop thru all bcd bytes
-;;
-;	; remainder of outer loop
-;	pop	de		; recover de
-;	dec	c		; dec bit counter
-;	jr	nz,bin2bcd0	; loop till done with all bits
-;	pop	ix		; restore ix
-;
-; make a bcd number from a binary number
-; 32 bit binary number in de:hl, result stored at (bc)
-; on output hl = bcd buf adr
-;
-bin2bcd:
-	push	ix		; save ix
-	; convert from de:hl -> (bc) to hl:ix -> (de)
-	; hl -> ix, de -> hl, bc -> de
-	ex	de,hl
-	push	de
-	pop	ix
-	push	bc
-	pop	de
-;
-	ld	c,32		; loop for 32 bits of binary dword
-;
-bin2bcd0:
-	; outer loop (once for each bit in binary number)	
-	ld	b,5		; loop for 5 bytes of result
-	push	de		; save de
-	add	ix,ix		; left shift next bit from hl:ix
-	adc	hl,hl		; ... into carry
-;
-bin2bcd1:
-	; inner loop (once for each byte of bcd number)
-	ld	a,(de)		; get it
-	adc	a,a		; double it w/ carry
-	daa			; decimal adjust
-	ld	(de),a		; save it
-	inc	de		; point to next bcd byte
-	djnz	bin2bcd1	; loop thru all bcd bytes
-;
-	; remainder of outer loop
-	pop	de		; recover de
-	dec	c		; dec bit counter
-	jr	nz,bin2bcd0	; loop till done with all bits
-	ex	de,hl		; hl -> bcd buf
-	pop	ix		; restore ix
-	ret
-;
-; print contents of 5 byte bcd number at (hl)
-; with leading zero suppression
-; all regs destroyed
-;
-prtbcd:
-	inc	hl		; bump hl to point to
-	inc	hl		; ...
-	inc	hl		; ...
-	inc	hl		; ... last byte of bcd
-	ld	b,5		; loop for 5 bytes
-	ld	c,0		; start by suppressing leading zeroes
-;
-prtbcd1:
-	; loop to print one bcd byte (two digits)
-	xor	a		; clear accum
-	rld			; rotate first nibble into a
-	call	prtbcd2		; print it
-	xor	a		; clear accum
-	rld			; rotate second nibble into a
-	call	prtbcd2		; print it
-	dec	hl		; point to prior byte
-	djnz	prtbcd1		; loop till done
-	ret			; return
-;
-prtbcd2:
-	; subroutine to print a digit in a
-	cp	c		; compare incoming to c
-	ret	z		; if equal, suppressing, abort
-	dec	c		; make c negative to stop suppression
-	add	a,'0'		; offset to printable value
-	jp	prtchr		; exit via character out