Miscellaneous

- CP/M 3 loader space improvement
- Minor doc update (thanks Radek)
- Preliminary diag level management
- Minor cosmetic bugs

Source/Doc/Applications.md

@@ -360,7 +360,7 @@ message.
 
 ## Etymology
 
-The `SYSCOPY` command is an original product and the source code is
+The `MODE` command is an original product and the source code is
 provided in the RomWBW distribution.
 
 `\clearpage`{=latex}

Source/Doc/Architecture.md

@@ -428,7 +428,7 @@ _Code_ | _Meaning_
 -7     | media not present
 -8     | hardware not present
 -9     | I/O error
--10    | write request to read-only media
+-10    | write request to read-only media	
 -11    | device timeout
 -12    | invalid configuration
 
@@ -1565,7 +1565,7 @@ the value of the subfucntion.  See subfunctions below.
 #### SYSRESET Subfunction 0x00 -- Internal HBIOS Reset (RESINT)
 
 |      _Entry Parameters_
-|           BC: 0xF000
+|           BC: 0xFD00
 
 |      _Returned Values_
 |           A: Status (0=OK, else error)
@@ -1576,7 +1576,7 @@ current OS. Does not reinitialize physical devices.
 #### SYSRESET Subfunction 0x01 -- Warm Start System (RESWARM)
 
 |      _Entry Parameters_
-|           BC: 0xF001
+|           BC: 0xFD01
 
 |      _Returned Values_
 |           <none>
@@ -1587,7 +1587,7 @@ reinitialize physical devices.
 #### SYSRESET Subfunction 0x02 -- Cold Start System (RESCOLD)
 
 |      _Entry Parameters_
-|           BC: 0xF002
+|           BC: 0xFD02
 
 |      _Returned Values_
 |           <none>

Source/Doc/GettingStarted.md

@@ -755,6 +755,11 @@ likely to encounter problems.
 
 ### Notes
 
+- You can change media, but it must be done while at the OS
+command prompt and you **must** warm start CP/M by pressing
+ctrl-c.  This is a CP/M 2.2 constraint and is well documented
+in the DRI manuals.
+
 - The original versions of DDT, DDTZ, and ZSID used the RST 38
 vector which conflicts with interrupt mode 1 use of this vector.
 The DDT, DDTZ, and ZSID applications in RomWBW have been modified
@@ -783,6 +788,10 @@ Manual.pdf").
 may not work as expected.  The best example is PIP which is not aware
 of the ZSDOS paths and will fail in some scenarios (use `COPY` instead).
 
+- Although ZSDOS can recognize a media change in some cases, it will not
+always work.  You should only change media at a command prompt and be
+sure to warm start the OS with a ctrl-c.
+
 ## NZCOM Automatic Z-System
 
 NZCOM is a much further refined version of Z-System (ZCPR 3.4). NZCOM
@@ -823,9 +832,14 @@ system tracks.  `CPMLDR.SYS` chain loads `CPM3.SYS`.
 used to read the current date/time for file stamping, etc.  You can
 use the `RTC` app to set the RTC clock.
 
-- The `COPYSYS` command described in the DRI CP/M 3 documentatin is
+- The `COPYSYS` command described in the DRI CP/M 3 documentation is
 not provided with RomWBW.  The RomWBW `SYSCOPY` command is used instead.
 
+- Although CP/M 3 is generally able to run CP/M 2.2 programs, this is
+not universally true.  This is especially true of the utility programs
+included with the operating system.  For example, the `SUBMIT` program
+of CP/M 3 is completely different from the `SUBMIT` program of CP/M 2.2.
+
 ## Simeon Cran's ZPM3
 
 ZPM3 is an interesting combination of the features of both CP/M 3 and
@@ -840,7 +854,9 @@ tracks of the disk.
 - `ZPMLDR` is included with ZPM3, but it is not working correctly.
 
 - The ZPM operating system is contained in the file called CPM3.SYS
-which is confusing, but it is the author's intended way of using ZPM3.
+which is confusing, but this is as intended by the ZPM3 distribution.
+I believe it was done this way to make it easier for users to transition
+from CP/M 3 to ZPM3.
 
 ## FreeRTOS