From a010260c8c89eb66608f9a2c03cc10f61a68fea2 Mon Sep 17 00:00:00 2001
From: wayne <wayne@1438685a-98c7-b363-4179-13d573978243>
Date: Fri, 10 May 2013 02:38:16 +0000
Subject: [PATCH] Reintegrate wbw -> trunk

---
 Apps/core/CLEAN.BAT                         |   3 -
 Apps/core/FETCH.BAT                         |  16 ---
 Apps/crossdev/APPLVERS.H                    |   2 +-
 Apps/crossdev/APPLVERS.LIB                  |   4 +-
 Apps/crossdev/{COREAPPS.BAT => BLDCORE.BAT} |  17 ++-
 Apps/crossdev/COPYCORE.BAT                  |  20 +++
 Clean.cmd                                   |  17 +++
 ReadMe.txt                                  |   4 +-
 RomDsk/CPM_1024KB/ZDE40.COM                 | Bin 0 -> 16896 bytes
 RomDsk/CPM_512KB/ZDE40.COM                  | Bin 0 -> 16896 bytes
 RomDsk/ZSYS_1024KB/ZDE40.COM                | Bin 0 -> 16896 bytes
 Source/cbios.asm                            |  86 +++++------
 Source/config_n8_2312.asm                   |   8 +-
 Source/config_n8_2511.asm                   |   8 +-
 Source/config_n8vem_cvdu.asm                |   8 +-
 Source/config_n8vem_dide.asm                |   8 +-
 Source/config_n8vem_diskio.asm              |   8 +-
 Source/config_n8vem_diskio3.asm             |   8 +-
 Source/config_n8vem_dsd.asm                 |   8 +-
 Source/config_n8vem_ppide.asm               |   8 +-
 Source/config_n8vem_ppisd.asm               |   8 +-
 Source/config_n8vem_propio.asm              |   9 +-
 Source/config_n8vem_simh.asm                |   8 +-
 Source/config_n8vem_std.asm                 |   8 +-
 Source/config_n8vem_vdu.asm                 |   8 +-
 Source/config_zeta_ppp.asm                  |   8 +-
 Source/config_zeta_std.asm                  |   8 +-
 Source/cvdu.asm                             |  43 ++++++
 Source/fd.asm                               |   4 +
 Source/hbios.asm                            |  45 +++---
 Source/kbd.asm                              |  36 ++---
 Source/n8v.asm                              | 149 +++++++++++++++++---
 Source/ppk.asm                              |  47 +++---
 Source/prp.asm                              |   6 +-
 Source/uart.asm                             |   2 -
 Source/util.asm                             |   2 +
 Source/ver.inc                              |   4 +-
 37 files changed, 409 insertions(+), 219 deletions(-)
 delete mode 100644 Apps/core/CLEAN.BAT
 delete mode 100644 Apps/core/FETCH.BAT
 rename Apps/crossdev/{COREAPPS.BAT => BLDCORE.BAT} (90%)
 create mode 100644 Apps/crossdev/COPYCORE.BAT
 create mode 100644 RomDsk/CPM_1024KB/ZDE40.COM
 create mode 100644 RomDsk/CPM_512KB/ZDE40.COM
 create mode 100644 RomDsk/ZSYS_1024KB/ZDE40.COM

diff --git a/Apps/core/CLEAN.BAT b/Apps/core/CLEAN.BAT
deleted file mode 100644
index 1545e88b..00000000
--- a/Apps/core/CLEAN.BAT
+++ /dev/null
@@ -1,3 +0,0 @@
-@echo off
-if exist *.COM del *.COM
-if exist *.MAN del *.MAN
\ No newline at end of file
diff --git a/Apps/core/FETCH.BAT b/Apps/core/FETCH.BAT
deleted file mode 100644
index 0079e599..00000000
--- a/Apps/core/FETCH.BAT
+++ /dev/null
@@ -1,16 +0,0 @@
-@echo off
-echo Copy CP/M-80 executables from the crossdev folder to here (core only)
-if exist *.COM del *.COM
-if exist *.MAN del *.MAN
-copy ..\crossdev\ACCESS.CPM ACCESS.COM
-copy ..\crossdev\CPMNAME.CPM CPMNAME.COM
-copy ..\crossdev\FINDFILE.CPM FINDFILE.COM
-copy ..\crossdev\MAP.CPM MAP.COM
-copy ..\crossdev\META.CPM META.COM
-copy ..\crossdev\MULTIFMT.CPM MULTIFMT.COM
-copy ..\crossdev\REM.CPM REM.COM
-copy ..\crossdev\SETLABEL.CPM SETLABEL.COM
-copy ..\crossdev\SYSGEN.CPM SYSGEN.COM
-copy ..\crossdev\TERMTYPE.CPM TERMTYPE.COM
-copy ..\crossdev\VIEW.CPM VIEW.COM
-copy ..\doc\dwg-apps.man DWG-APPS.MAN
\ No newline at end of file
diff --git a/Apps/crossdev/APPLVERS.H b/Apps/crossdev/APPLVERS.H
index 0c496cc4..eb27c7c6 100644
--- a/Apps/crossdev/APPLVERS.H
+++ b/Apps/crossdev/APPLVERS.H
@@ -8,7 +8,7 @@
 #define A_RTP 6
 
 #define A_MONTH	4
-#define A_DAY 9
+#define A_DAY 11
 #define A_YEAR 2013
 #define A_YR   13
 
diff --git a/Apps/crossdev/APPLVERS.LIB b/Apps/crossdev/APPLVERS.LIB
index 9f09b053..60cfd10d 100644
--- a/Apps/crossdev/APPLVERS.LIB
+++ b/Apps/crossdev/APPLVERS.LIB
@@ -6,11 +6,11 @@ A$RUP	equ	0
 A$RTP	equ	6
 
 A$MONTH	equ	4
-A$DAY	equ	9
+A$DAY	equ	11
 A$YEAR	equ	2013
 
 date	macro
-dat	db	'  4/9/2013$'
+dat	db	' 4/11/2013$'
 	endm
 
 serial	macro
diff --git a/Apps/crossdev/COREAPPS.BAT b/Apps/crossdev/BLDCORE.BAT
similarity index 90%
rename from Apps/crossdev/COREAPPS.BAT
rename to Apps/crossdev/BLDCORE.BAT
index 93f1ed21..725770ce 100644
--- a/Apps/crossdev/COREAPPS.BAT
+++ b/Apps/crossdev/BLDCORE.BAT
@@ -2,60 +2,73 @@
 
 rem coreapps.bat 2/15/2013 dwg - build all core apps using batch files
 
+echo.
 echo Building access.com...
 if not exist access.cpm call access.bat
 if not exist access.cpm echo WARNING ACCESS DIDN'T BUILD
 if not exist access.cpm pause
 
+echo.
 echo Building cpmname.com...
 if not exist cpmname.cpm call cpmname.bat
 if not exist cpmname.cpm echo WARNING CPMNAME DIDN'T BUILD
 if not exist cpmname.cpm pause
 
+echo.
 echo Building findfile.com...
 if not exist findfile.cpm call findfile.bat
 if not exist findfile.cpm echo WARNING FINDFILE DIDN'T BUILD
 if not exist findfile.cpm pause
 
+echo.
 echo Building map.com...
 if not exist map.cpm call map.bat
 if not exist map.cpm echo WARNING MAP DIDN'T BUILD
 if not exist map.cpm pause
 
+echo.
 echo Building meta.com...
 if not exist meta.cpm call meta.bat
 if not exist meta.cpm echo WARNING META DIDN'T BUILD
 if not exist meta.cpm pause
 
+echo.
 echo Building multifmt.com...
 if not exist multifmt.cpm call multifmt.bat
 if not exist multifmt.cpm echo WARNING MULTIFMT DIDN'T BUILD
 if not exist multifmt.cpm pause
 
+echo.
 echo Building rem.com...
 if not exist rem.cpm call makerem.bat
 if not exist rem.cpm echo WARNING REM DIDN'T BUILD
 if not exist rem.cpm pause
 
+echo.
 echo Building setlabel.com...
 if not exist setlabel.cpm call setlabel.bat
 if not exist setlabel.cpm echo WARNING SETLABEL DIDN'T BUILD
 if not exist setlabel.cpm pause
 
+echo.
 echo Building sysgen.com...
 if not exist sysgen.cpm call sysgen.bat
 if not exist sysgen.cpm echo WARNING SYSGEN DIDN'T BUILD
 if not exist sysgen.cpm pause
 
+echo.
 echo Building termtype.com...
 if not exist termtype.cpm call termtype.bat
 if not exist termtype.cpm echo WARNING TERMTYPE DIDN'T BUILD
 if not exist termtype.cpm pause
 
+echo.
 echo Building view.com...
 if not exist view.cpm call view.bat
 if not exist view.cpm echo WARNING VIEW DIDN'T BUILD
 if not exist view.cpm pause
 
-echo All Core Apps Built
-dir *.cpm
\ No newline at end of file
+echo.
+echo Build Core Apps complete:
+echo.
+dir *.CPM
\ No newline at end of file
diff --git a/Apps/crossdev/COPYCORE.BAT b/Apps/crossdev/COPYCORE.BAT
new file mode 100644
index 00000000..93c37de9
--- /dev/null
+++ b/Apps/crossdev/COPYCORE.BAT
@@ -0,0 +1,20 @@
+@echo off
+
+echo.
+echo Regenerate Core directory...
+echo.
+
+if exist ..\core\*.* del /q ..\core\*.*
+
+copy ACCESS.CPM ..\core\*.COM
+copy CPMNAME.CPM ..\core\*.COM
+copy FINDFILE.CPM ..\core\*.COM
+copy MAP.CPM ..\core\*.COM
+copy META.CPM ..\core\*.COM
+copy MULTIFMT.CPM ..\core\*.COM
+copy REM.CPM ..\core\*.COM
+copy SETLABEL.CPM ..\core\*.COM
+copy SYSGEN.CPM ..\core\*.COM
+copy TERMTYPE.CPM ..\core\*.COM
+copy VIEW.CPM ..\core\*.COM
+copy ..\doc\DWG-APPS.MAN ..\core\DWG-APPS.MAN
\ No newline at end of file
diff --git a/Clean.cmd b/Clean.cmd
index 09f058b6..66e5d9eb 100644
--- a/Clean.cmd
+++ b/Clean.cmd
@@ -1,5 +1,22 @@
 @echo off
+setlocal
+
+echo Cleaning Source...
 pushd Source
 call Clean.cmd
 popd
+
+echo Cleaning Apps\core...
+pushd Apps\core
+del /q *.*
+popd
+
+echo Cleaning Apps\crossdev...
+pushd Apps\crossdev
+call Clean.bat
+popd
+
+choice /m "Clean Output directory?"
+if errorlevel 2 goto :eof
+echo Cleaning Output...
 if exist Output\*.* del Output\*.* /Q
\ No newline at end of file
diff --git a/ReadMe.txt b/ReadMe.txt
index 86ceab92..e6b3d546 100644
--- a/ReadMe.txt
+++ b/ReadMe.txt
@@ -8,8 +8,8 @@ Builders: Wayne Warthen (wwarthen@gmail.com)
           Douglas Goodall (douglas_goodall@mac.com)
           David Giles (vk5dg@internode.on.net)
 
-Updated: 2013-04-07
-Version: 2.5 Beta 5
+Updated: 2013-04-28
+Version: 2.5 Beta 7
 
 This is an adaptation of CP/M-80 2.2 and ZSDOS/ZCPR
 targeting ROMs for all N8VEM Z80 hardware variations
diff --git a/RomDsk/CPM_1024KB/ZDE40.COM b/RomDsk/CPM_1024KB/ZDE40.COM
new file mode 100644
index 0000000000000000000000000000000000000000..6a2d37dee3350010df364e9ca1e7cccc61be7c44
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zE%;eV&%)b2=rONuNnv<=>NoQBwS4^szP|eA&8t`6yKDK@#^%mVJG<&PZmHeCZ`j4J
ztJ(aGPX695e&srT&1Qc6CVs<ae$`6)#pr*3{#ye7*Ck-wFLwxkEo+a^@2imUB^F?1
z^aS!Vf8?k7S4(lT62I7^AXoUu<$98shTEHV;rW$%s+b_0!VwccF-st?qJD5k$H#ki
zAFe;Sx2^r1_Rbzt{i`j_t&u&u@%A4(>37UcJ@NIUx7W<Ro9Z_l-q88+j<%gmDfMGJ
z+xE7id4P~x?g7eqLf+YWc+JhHb~e4=(sWPf;riq4#-7w;uHSHecT3}r$o-A&_odXo
zLajhPv%7IutiN;3tsPC^A-?`BkU?|j;rcgrG<INr+O-QuRP`s?n|IwyJO&A8XDi-b
z0#5st)te62k5h-(pbppHCf48ebo=fr_h5@l>EXl;n{M9xN`3VbEc4&i*Z#JCWNq!4
z&9|>we{;?4n-`@p_0`8$HSKEt;O>^T9rqosuYQ$YCXGE49aNvfe)&#o(_Zjj{Sxh}
zJ@Gep?9gZz{BUQ}Jt_6o!%eO47|7tf8f-vlksHKb*^G^?$5vmhu4}!g%|QJ{M`v4m
z<i4gZppM?&3TaH<-Etpwbq3q@JNMu;j`})5TcW!Kn>CR=y`jCi6+=hYp5o$TdpaWb
z5q=QAm;Wr*H}Fr=X4%r*(MkAY27c3DHAA4lTD)cD@y^D#?rz)x*;k*tzwK)=9;x3!
zvJ4TUV{|pLaSw28gtHRnX748*_cq^irDF%S*;Z_#@%0;z?`rG(a21J*O3I$TjvXI&
zw(Ul*8)+6gKfJm2HfjMsGy`}$-}zx|>S>%Cm7RofcN_7!aZS_vKL@oK#z1@1?v|B1
znhc~f)XkRKwLKP~wDh%nfS>Ri>amgZqw_=9j&>q<y7R-9#*QmH_Oy4jwHug0!n}DF
zvmKaCtviW|p~r@n5K}5aZP>Nsw$_v$v3}zS74KZV;mp_fH0^;HTX85_Uwd288O+e7
zj;79@xcXWZBBa;&`r6a5iIEn=PEre`aDU@{P}PrGTB$s+a!+U5;%1OWVT?$$H?`3F
zOCYhMrJYE;vh(iuH}7uT(cHR=imz^kxZ3viB-Gc^95i(rxWUy;t({E<{JF0+w!hce
zcy|ZU3Ek4Q``)J3MzYw1J+!;MZFgHc6&qU&%#&+d_H?`pi2?d-`<@mMvDDX|Skv5r
Zx%h1LrVc_oe`n)IvvbR*{2$uV{wMiPr_}%e

literal 0
HcmV?d00001

diff --git a/Source/cbios.asm b/Source/cbios.asm
index 2a419d7f..0f4d6a95 100644
--- a/Source/cbios.asm
+++ b/Source/cbios.asm
@@ -3,6 +3,7 @@
 ;	CBIOS FOR N8VEM
 ;
 ;	BY ANDREW LYNCH, WITH INPUT FROM MANY SOURCES
+;	ROMWBW ADAPTATION BY WAYNE WARTHEN
 ;__________________________________________________________________________________________________
 ;
 ; cbios.asm  6/04/2012 dwg - added BOOTLU
@@ -25,7 +26,7 @@
 ;==================================================================================================
 ; These jumps are defined in the CP/M-80 v2.2 system guide and comprise
 ; the invariant part of the BIOS.
-
+;
 	JP	BOOT			; #0  - COLD START
 WBOOTE	JP	WBOOT			; #1  - WARM START
 	JP	CONST			; #2  - CONSOLE STATUS
@@ -33,7 +34,7 @@ WBOOTE	JP	WBOOT			; #1  - WARM START
 	JP	CONOUT			; #4  - CONSOLE CHARACTER OUT
 	JP	LIST			; #5  - LIST CHARACTER OUT
 	JP	PUNCH			; #6  - PUNCH CHARACTER OUT
-          	JP	READER			; #7  - READER CHARACTER OUT
+	JP	READER			; #7  - READER CHARACTER OUT
 	JP	HOME			; #8  - MOVE HEAD TO HOME POSITION
 	JP	SELDSK			; #9  - SELECT DISK
 	JP	SETTRK			; #10 - SET TRACK NUMBER
@@ -43,20 +44,24 @@ WBOOTE	JP	WBOOT			; #1  - WARM START
 	JP	WRITE			; #14 - WRITE DISK
 	JP	LISTST			; #15 - RETURN LIST STATUS
 	JP	SECTRN			; #16 - SECTOR TRANSLATE
+;
 ;------------------------------------------------------------------------
 ; These jumps are enhancements, added for the benefit of the RomWBW BIOS
 ; and are located following the invariant jump table so they can be
 ; easily located by external programs. They transfger control to routines
 ; that are located somewhere within the main section of the CBIOS.
-
+;
 	JP	BNKSEL			; #17 - SEL. RAM BANK FOR LOW32K (obsolete, use HBIOS)
 	JP	GETDSK			; #18 - Get Disk Info (device/unit/lu)
 	JP	SETDSK			; #19 - Set Disk Into (device/unit/lu)
 	JP	GETINFO			; #20 - Get BIOS Info Base Ptr
+;
+;------------------------------------------------------------------------
 ; Expansion area for future enhancements - In order not to shift the
 ; subsequent data and break local and external code, space is set aside for
 ; four additional jumps.  Until implemented, an invocation will result in
 ; a system panic.
+;
 	CALL	PANIC			; #21 - reserved for JP <new function>
 	CALL	PANIC			; #22 - reserved for JP <new function>
 	CALL	PANIC			; #23 - reserved for JP <new function>
@@ -99,18 +104,18 @@ BOOT:
 WBOOT:
 	DI
 	IM	1
-
+;
 	LD	SP,ISTACK	; STACK FOR INITIALIZATION
-	
+;	
 	; RELOAD COMMAND PROCESSOR FROM CACHE
-	LD	A,1
-	CALL	RAMPG
-	LD	HL,0800H	; LOCATION IN RAM1 OF COMMAND PROCESSOR CACHE
+	LD	A,1		; SELECT RAM BANK 1
+	CALL	RAMPG		; DO IT
+	LD	HL,0800H	; LOCATION IN RAM BANK 1 OF COMMAND PROCESSOR CACHE
 	LD	DE,CPM_LOC	; LOCATION OF ACTIVE COMMAND PROCESSOR
 	LD	BC,CCPSIZ	; SIZE OF COMMAND PROCESSOR
-	LDIR
-	CALL	RAMPGZ
-
+	LDIR			; COPY
+	CALL	RAMPGZ		; RESTORE RAM PAGE 0
+;
 	; FALL THRU TO INVOKE CP/M
 ;
 ;__________________________________________________________________________________________________			
@@ -120,13 +125,13 @@ GOCPM:
 	LD	(BUFADR),HL
 	LD	B,BF_DIOSETBUF
 	RST	08
-
+;
 	LD	A,0C3H			; LOAD A WITH 'JP' INSTRUCTION (USED BELOW)
-
+;
 	; CPU RESET / RST 0 -> WARM START CP/M
-	LD	(0000H),A
-	LD	HL,WBOOTE
-	LD	(0001H),HL
+	LD	($0000),A		; JP OPCODE GOES HERE
+	LD	HL,WBOOTE		; GET WARM BOOT ENTRY ADDRESS
+	LD	($0001),HL		; PUT IT AT $0001
 
 ;	; INT / RST 38 -> INVOKE MONITOR
 ;	LD	(0038H),A
@@ -139,16 +144,16 @@ GOCPM:
 ;	LD	(0039H),HL		; POKE IT
 	
 	; CALL 5 -> INVOKE BDOS
-	LD	(0005H),A
-	LD	HL,BDOS
-	LD	(0006H),HL
+	LD	(0005H),A		; JP OPCODE AT $0005
+	LD	HL,BDOS			; GET BDOS ENTRY ADDRESS
+	LD	(0006H),HL		; PUT IT AT $0006
 
 	; RESET (DE)BLOCKING ALGORITHM
 	CALL	BLKRES
 
 	; DEFAULT DMA ADDRESS
-	LD	BC,80H
-	CALL	SETDMA
+	LD	BC,80H			; DEFAULT DMA ADDRESS IS $0080
+	CALL	SETDMA			; SET IT
 
 	; ENSURE VALID DISK AND JUMP TO CCP
 	LD	A,(CDISK)		; GET CURRENT USER/DISK
@@ -157,12 +162,12 @@ GOCPM:
 	CALL	DSK_STATUS		; CHECK DISK STATUS
 	JR	Z,CURDSK		; ZERO MEANS OK
 	LD	A,(DEFDRIVE)		; CURRENT DRIVE NOT READY, USE DEFAULT
-	JR	GOCCP
+	JR	GOCCP			; JUMP TO COMMAND PROCESSOR
 CURDSK:
 	LD	A,(CDISK)		; GET CURRENT USER/DISK
 GOCCP:
 	LD	C,A			; SETUP C WITH CURRENT USER/DISK, ASSUME IT IS OK
-	JP	CCP
+	JP	CCP			; JUMP TO COMMAND PROCESSOR
 ;
 ;__________________________________________________________________________________________________			
 GOMON:
@@ -310,7 +315,7 @@ CIOST:
 ;
 	OR	A		; SET FLAGS
 	RET	Z		; NO CHARACTERS WAITING (IST) OR OUTPUT BUF FULL (OST)
-	OR	0FFH		; $FF SIGNALS READY TO READ (IST) OR WRITE (OST)
+	OR	$FF		; $FF SIGNALS READY TO READ (IST) OR WRITE (OST)
 	RET
 ;__________________________________________________________________________________________________
 SELDSK:
@@ -318,6 +323,7 @@ SELDSK:
 #IF DSKTRACE
 	CALL	PRTSELDSK	; *DEBUG*
 #ENDIF
+;
 	JP	DSK_SELECT
 ;
 ;__________________________________________________________________________________________________	
@@ -326,12 +332,12 @@ HOME:
 #IF DSKTRACE
 	CALL	PRTHOME		; *DEBUG*
 #ENDIF
-	
+;	
 	LD	A,(HSTWRT)	; CHECK FOR PENDING WRITE
-	OR	A
-	JR	NZ,HOMED
+	OR	A		; SET FLAGS
+	JR	NZ,HOMED	; BUFFER IS DIRTY
 	LD	(HSTACT),A	; CLEAR HOST ACTIVE FLAG
-
+;
 HOMED:
 	LD	BC,0
 ;
@@ -568,9 +574,9 @@ BLKFLSH:
 
 #IF WRTCACHE
 
-WRT_ALL	.EQU	0			; WRITE TO ALLOCATED
+WRT_ALC	.EQU	0			; WRITE TO ALLOCATED
 WRT_DIR	.EQU	1			; WRITE TO DIRECTORY
-WRT_UAL	.EQU	2			; WRITE TO UNALLOCATED
+WRT_UNA	.EQU	2			; WRITE TO UNALLOCATED
 
 ;
 ;__________________________________________________________________________________________________
@@ -589,7 +595,7 @@ BLKRW:
 	; OTHERWISE, CLEAR OUT ANY SEQUENTIAL, UNALLOC WRITE PROCESSING
 	; AND GO DIRECTLY TO MAIN I/O
 	XOR	A		; ZERO TO A
-	LD	(WRTYPE),A	; SET WRITE TYPE = 0 (WRT_ALL) TO ENSURE READ OCCURS
+	LD	(WRTYPE),A	; SET WRITE TYPE = 0 (WRT_ALC) TO ENSURE READ OCCURS
 	LD	(UNACNT),A	; SET UNACNT TO ABORT SEQ WRITE PROCESSING
 	
 	JR	BLKRW4		; GO TO I/O
@@ -598,25 +604,25 @@ BLKRW1:
 	; WRITE PROCESSING
 	; CHECK FOR FIRST WRITE TO UNALLOCATED BLOCK
 	LD	A,(WRTYPE)	; GET WRITE TYPE
-	CP	WRT_UAL		; IS IT WRITE TO UNALLOC?
+	CP	WRT_UNA		; IS IT WRITE TO UNALLOC?
 	JR	NZ,BLKRW2	; NOPE, BYPASS
 	
 	; INITIALIZE START OF SEQUENTIAL WRITING TO UNALLOCATED BLOCK
 	; AND THEN TREAT SUBSEQUENT PROCESSING AS A NORMAL WRITE
 	CALL	UNA_INI		; INITIALIZE SEQUENTIAL WRITE TRACKING
-	XOR	A		; A = 0 = WRT_ALL
+	XOR	A		; A = 0 = WRT_ALC
 	LD	(WRTYPE),A	; NOW TREAT LIKE WRITE TO ALLOCATED
 
 BLKRW2:
-	; IF WRTYPE = WRT_ALL AND SEQ WRITE, GOTO BLKRW7 (SKIP READ)
+	; IF WRTYPE = WRT_ALC AND SEQ WRITE, GOTO BLKRW7 (SKIP READ)
 	OR	A		; NOTE: A WILL ALREADY HAVE THE WRITE TYPE HERE
-	JR	NZ,BLKRW3	; NOT TYPE = 0 = WRT_ALL, SO MOVE ON
+	JR	NZ,BLKRW3	; NOT TYPE = 0 = WRT_ALC, SO MOVE ON
 
 	CALL	UNA_CHK		; CHECK FOR CONTINUATION OF SEQ WRITES TO UNALLOCATED BLOCK
 	JR	NZ,BLKRW3	; NOPE, ABORT
 	
 	; WE MATCHED EVERYTHING, TREAT AS WRITE TO UNALLOCATED BLOCK
-	LD	A,WRT_UAL	; WRITE TO UNALLOCATED
+	LD	A,WRT_UNA	; WRITE TO UNALLOCATED
 	LD	(WRTYPE),A	; SAVE WRITE TYPE
 	
 	CALL	UNA_INC		; INCREMENT SEQUENTIAL WRITE TRACKING
@@ -857,11 +863,11 @@ BLK_CMP:
 BLK_CMPLOOP:
 	LD	A,(DE)
 	CP	(HL)
-	RET	NZ		; BAD COMPARE, RETURN WITH NZ
+	RET	NZ			; BAD COMPARE, RETURN WITH NZ
 	INC	HL
 	INC	DE
 	DJNZ	BLK_CMPLOOP
-	RET			; RETURN WITH Z
+	RET				; RETURN WITH Z
 ;
 ;__________________________________________________________________________________________________
 ;
@@ -993,7 +999,7 @@ DSK_DISP:
 	RST	08		; OTHERWISE, HANDLE IN HBIOS
 	RET			; AND RETURN
 ;
-; LOOKUP DPH BASED ON DPM DRIVE NUMBER
+; LOOKUP DPH BASED ON CPM DRIVE NUMBER
 ;   ENTER WITH C=CPM DRIVE NUMBER
 ;   RETURNS WITH HL = DPH ADDRESS (0 ON ERROR)
 ;   A=0 ON SUCCESS, A=1 ON ERROR
@@ -1132,7 +1138,7 @@ DSK_SELECT4:
 ;
 ;
 DSK_STATUS:
-	; C HAS CPM DRIVE, LOOKUP DEVICE/UNIT AND CHECK FOR INVLAID DRIVE
+	; C HAS CPM DRIVE, LOOKUP DEVICE/UNIT AND CHECK FOR INVALID DRIVE
 	CALL	DSK_GETDPH	; B = DEVICE/UNIT
 	RET	NZ		; INVALID DRIVE ERROR
 	
diff --git a/Source/config_n8_2312.asm b/Source/config_n8_2312.asm
index ff89bb0b..d1130488 100644
--- a/Source/config_n8_2312.asm
+++ b/Source/config_n8_2312.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8 2312
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	20		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_N8V	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_ANSI	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_N8V	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_ANSI	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8_2511.asm b/Source/config_n8_2511.asm
index 4df5fade..34294352 100644
--- a/Source/config_n8_2511.asm
+++ b/Source/config_n8_2511.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8 2511
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	20		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_N8V	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_ANSI	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_N8V	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_ANSI	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_cvdu.asm b/Source/config_n8vem_cvdu.asm
index 1c9a53e9..97759105 100644
--- a/Source/config_n8vem_cvdu.asm
+++ b/Source/config_n8vem_cvdu.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ VDU 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ COLOR VDU
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_CVDU	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_ANSI	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_CVDU	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_ANSI	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_dide.asm b/Source/config_n8vem_dide.asm
index 346ecf10..f93ead00 100644
--- a/Source/config_n8vem_dide.asm
+++ b/Source/config_n8vem_dide.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ DUAL IDE + FLOPPY
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_diskio.asm b/Source/config_n8vem_diskio.asm
index daad8e37..ecdcc70b 100644
--- a/Source/config_n8vem_diskio.asm
+++ b/Source/config_n8vem_diskio.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM W/ DISKIO (ORIGINAL V1)
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_diskio3.asm b/Source/config_n8vem_diskio3.asm
index 55163120..0d0f82d8 100644
--- a/Source/config_n8vem_diskio3.asm
+++ b/Source/config_n8vem_diskio3.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ DISKIO V3 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ DISKIO V3
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_dsd.asm b/Source/config_n8vem_dsd.asm
index a77503a8..c76f5a16 100644
--- a/Source/config_n8vem_dsd.asm
+++ b/Source/config_n8vem_dsd.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ DUAL SD
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_ppide.asm b/Source/config_n8vem_ppide.asm
index 36ee2d3c..85921da5 100644
--- a/Source/config_n8vem_ppide.asm
+++ b/Source/config_n8vem_ppide.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ PPIDE 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ PPIDE
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_ppisd.asm b/Source/config_n8vem_ppisd.asm
index 43054fa7..d8eb3447 100644
--- a/Source/config_n8vem_ppisd.asm
+++ b/Source/config_n8vem_ppisd.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ PPISD
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_propio.asm b/Source/config_n8vem_propio.asm
index 5c90bed6..9500e252 100644
--- a/Source/config_n8vem_propio.asm
+++ b/Source/config_n8vem_propio.asm
@@ -1,16 +1,17 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ PROP IO
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_PRPCON	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_PRPCON	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	CIODEV_UART	; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
+
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_simh.asm b/Source/config_n8vem_simh.asm
index 656e1fe5..d7b5fb61 100644
--- a/Source/config_n8vem_simh.asm
+++ b/Source/config_n8vem_simh.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR SIMH EMULATOR 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR SIMH EMULATOR
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_ALWAYS	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_std.asm b/Source/config_n8vem_std.asm
index c48ee10c..0feea581 100644
--- a/Source/config_n8vem_std.asm
+++ b/Source/config_n8vem_std.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_n8vem_vdu.asm b/Source/config_n8vem_vdu.asm
index a4ccd6a5..2bdeadd8 100644
--- a/Source/config_n8vem_vdu.asm
+++ b/Source/config_n8vem_vdu.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ VDU 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR N8VEM SBC W/ VDU
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	8		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_VDU	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_ANSI	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_VDU	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_ANSI	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_zeta_ppp.asm b/Source/config_zeta_ppp.asm
index c393bdda..af654903 100644
--- a/Source/config_zeta_ppp.asm
+++ b/Source/config_zeta_ppp.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR ZETA W/ PPP 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR ZETA W/ PARPORTPROP
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	20		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_PPPCON	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_PPPCON	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	CIODEV_UART	; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/config_zeta_std.asm b/Source/config_zeta_std.asm
index e17efafb..06f37db6 100644
--- a/Source/config_zeta_std.asm
+++ b/Source/config_zeta_std.asm
@@ -1,16 +1,16 @@
 ;
 ;==================================================================================================
-;   ROMWBW 2.X CONFIGURATION FOR ZETA 5/8/2012
+;   ROMWBW 2.X CONFIGURATION FOR ZETA
 ;==================================================================================================
 ;
 ; BUILD CONFIGURATION OPTIONS
 ;
 CPUFREQ		.EQU	20		; IN MHZ, USED TO COMPUTE DELAY FACTORS
 ;
-DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, CIODEV_VDU, DIODEV_PRPCON
+DEFCON		.EQU	CIODEV_UART	; DEFAULT CONSOLE DEVICE (LOADER AND MONITOR): CIODEV_UART, DIODEV_CRT, CIODEV_PRPCON, CIODEV_PPPCON
 ALTCON		.EQU	DEFCON		; ALT CONSOLE DEVICE (USED WHEN CONFIG JUMPER SHORTED)
-DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_UPD7220, VDADEV_N8V)
-DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT EMULATION TYPE (EMUTYP_TTY, EMUTYP_ANSI, ...)
+DEFVDA		.EQU	VDADEV_NONE	; DEFAULT VDA DEVICE (VDADEV_NONE, VDADEV_VDU, VDADEV_CVDU, VDADEV_N8V, VDADEV_UPD7220)
+DEFEMU		.EQU	EMUTYP_TTY	; DEFAULT VDA EMULATION (EMUTYP_TTY, EMUTYP_ANSI, ...)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB, MUST MATCH YOUR HARDWARE!!!
 CLRRAMDISK	.EQU	CLR_AUTO	; CLR_ALWAYS, CLR_NEVER, CLR_AUTO (CLEAR IF INVALID DIR AREA)
diff --git a/Source/cvdu.asm b/Source/cvdu.asm
index 6a24057a..d02067c3 100644
--- a/Source/cvdu.asm
+++ b/Source/cvdu.asm
@@ -31,7 +31,10 @@ CVDU_INIT:
 	LD	A,CVDU_STAT
 	CALL	PRTHEXBYTE
 ;
+	PRTS(" VDURAM=$")
 	CALL 	CVDU_CRTINIT		; SETUP THE CVDU CHIP REGISTERS
+	CALL	PRTDEC
+	PRTS("KB$")
 	CALL	CVDU_LOADFONT		; LOAD FONT DATA FROM ROM TO CVDU STRORAGE
 
 CVDU_RESET:
@@ -278,6 +281,46 @@ CVDU_CRTINIT1:
 	INC	HL			; POINT TO NEXT VALUE
 	INC	C			; POINT TO NEXT REGISTER
 	DJNZ	CVDU_CRTINIT1		; LOOP
+;
+; NOW DETERMINE VDU RAM SIZE DYNAMICALLY
+; ASSUMES THAT VDU RAM SIZE IS SET FOR 64KB ABOVE
+;   A.  WRITE ZERO TO ADDRESS $0000
+;   B.  WRITE NON-ZERO TO ADDRESS $0100
+;   C.  CHECK THE VALUE IN ADDRESS $0000; IF IT CHANGED, 
+;       16K DRAM CHIPS INSTALLED; IF NOT, 64K DRAM CHIPS INSTALLED
+; IF 16KB RAM DETECTED, ADJUST VDU REGISTERS APPROPRIATELY
+;
+	; WRITE $00 TO VDU RAM LOCATION $0000
+	LD	HL,$0000		; POINT TO VDU RAM LOC $0000
+	LD	C,18			; UPDATE ADDRESS REGISTER PAIR
+	CALL	CVDU_WRX		; DO IT
+	XOR	A			; ZERO IN ACCUM
+	LD	C,31			; DATA REGISTER
+	CALL	CVDU_WR			; WRITE ZERO TO $0000
+	; WRITE $FF TO VDU RAM LOCATION $0100
+	LD	HL,$0100		; POINT TO VDU RAM LOC $0100
+	LD	C,18			; UPDATE ADDRESS REGISTER PAIR
+	CALL	CVDU_WRX		; DO IT
+	LD	A,$FF			; $FF IN ACCUM
+	LD	C,31			; DATA REGISTER
+	CALL	CVDU_WR			; WRITE ZERO TO $0100
+	; READ VALUE FROM VDU RAM LOCATION $0000
+	LD	HL,$0000		; POINT TO VDU RAM LOC $0000
+	LD	C,18			; UPDATE ADDRESS REGISTER PAIR
+	CALL	CVDU_WRX		; DO IT
+	LD	C,31			; DATA REGISTER
+	CALL	CVDU_RD			; READ VALUE AT $0000
+	; CHECK VALUE, IF NOT $00, ADJUST RAM SIZE
+	OR	A			; SET FLAGS
+	JR	NZ,CVDU_CRTINIT2	; IF NOT ZERO, ADJUST RAM SIZE
+	LD	HL,64			; RETURN RAMSIZE IN HL
+	RET				; 64K CHIPS USED, ALL DONE
+;
+CVDU_CRTINIT2:	; ADJUST FOR 16K RAM SIZE
+	LD	A,$20			; NEW VALUE
+	LD	C,28			; FOR REG 28
+	CALL	CVDU_WR			; DO IT
+	LD	HL,16			; RETURN RAMSIZE IN HL
     	RET
 ;
 ;----------------------------------------------------------------------
diff --git a/Source/fd.asm b/Source/fd.asm
index cbac6890..606f2808 100644
--- a/Source/fd.asm
+++ b/Source/fd.asm
@@ -1094,6 +1094,10 @@ FOP_CMD2:	; START OF LOOP TO SEND NEXT BYTE
 FOP_CMD4:	; START OF STATUS LOOP, WAIT FOR FDC TO BE READY FOR BYTE	
 	CALL	DELAY		; FDC MAY TAKE UP TO 12us TO UPDATE MSR
 	IN	A,(FDC_MSR)	; READ MAIN STATUS REGISTER
+;	PUSH	AF		; *DEBUG*
+;	CALL	PC_SPACE	; *DEBUG*
+;	CALL	PRTHEXBYTE	; *DEBUG*
+;	POP	AF		; *DEBUG*
 	AND	0C0H		; ISOLATE RQM/DIO
 	CP	080H		; LOOKING FOR RQM=1, DIO=0 (FDC READY FOR A BYTE)
 	JR	Z,FOP_CMD6	; GOOD, GO TO SEND BYTE
diff --git a/Source/hbios.asm b/Source/hbios.asm
index 32c10351..f097ec3f 100644
--- a/Source/hbios.asm
+++ b/Source/hbios.asm
@@ -67,18 +67,6 @@ INITSYS2:
 	PUSH	DE
 	PUSH	BC
 	CALL	JPHL
-;	OR	A
-;	JR	Z,INITSYS3
-;	PUSH	AF
-;	CALL	PC_SPACE
-;	POP	AF
-;	CALL	PC_LBKT
-;	CALL	PRTHEXBYTE
-;	CALL	PC_RBKT
-;	JR	INITSYS4
-;INITSYS3:
-;	PRTS(" [OK]$")
-;INITSYS4:
 	POP	BC
 	POP	DE
 	DJNZ	INITSYS2
@@ -177,9 +165,17 @@ HB_INITTBLLEN	.EQU	(($ - HB_INITTBL) / 2)
 ;__________________________________________________________________________________________________
 ;
 IDLE:
+	PUSH	AF
+	PUSH	BC
+	PUSH	DE
+	PUSH	HL
 #IF (FDENABLE)
 	CALL	FD_IDLE
 #ENDIF
+	POP	HL
+	POP	DE
+	POP	BC
+	POP	AF
 	RET
 ;
 ;==================================================================================================
@@ -450,10 +446,16 @@ EMU_QRY:
 ; IS DYNAMICALLY MODIFIED TO POINT TO THE VDA DISPATCHER FOR THE 
 ; CURRENT EMULATION VDA TARGET.
 ;
+; VDA_DISPERR IS FAILSAFE EMULATION DISPATCH ADDRESS WHICH JUST
+; CHAINS TO SYSTEM PANIC
+;
+VDA_DISPERR:
+	JP	PANIC
+;
 ; BELOW IS USED TO INITIALIZE THE EMULATION VDA DISPATCH TARGET
 ; BASED ON THE DEFAULT VDA.
 ;
-VDA_DISPADR	.EQU	0
+VDA_DISPADR	.EQU	VDA_DISPERR
 #IF (VDUENABLE & (DEFVDA == VDADEV_VDU))
 VDA_DISPADR	.SET	VDU_DISPVDA
 #ENDIF
@@ -474,10 +476,11 @@ VDA_DISPADR	.SET	N8V_DISPVDA
 ; THE CODE DYNAMICALLY WHEN EMULATION IS INITIALIZED AND
 ; A NEW VDA TARGET IS SPECIFIED.
 ;
-EMU_VDADISPADR	.EQU	$ + 1
 EMU_VDADISP:
 	JP	VDA_DISPADR
 ;
+EMU_VDADISPADR	.EQU	$ - 2		; ADDRESS PORTION OF JP INSTRUCTION ABOVE
+;
 ;==================================================================================================
 ;   VIDEO DISPLAY ADAPTER DEVICE DISPATCHER
 ;==================================================================================================
@@ -567,7 +570,7 @@ SYS_BNKCPY:
 ;     E: UPDATE VERION IN TOP 4 BITS, PATCH VERSION IN LOW 4 BITS
 ;
 SYS_GETVER:
-	LD	DE,0 | (RMJ<<12) | (RMN<<8) | (RUP<<4) | RTP
+	LD	DE,0 | (RMJ << 12) | (RMN << 8) | (RUP << 4) | RTP
 	XOR	A
 	RET
 ;
@@ -579,11 +582,13 @@ SYS_GETVER:
 ; AN IDLE CONDITION IS DETECTED (WAIT FOR INPUT/OUTPUT)
 ;
 CIO_IDLE:
-	LD	HL,IDLECOUNT		; POINT TO IDLE COUNT
-	DEC	(HL)			; 256 TIMES?
-	CALL	Z,IDLE			; RUN IDLE PROCESS EVERY 256 ITERATIONS
-	XOR	A			; SIGNAL NO CHAR READY
-	RET				; AND RETURN
+	PUSH	AF			; PRESERVE AF
+	LD	A,(IDLECOUNT)		; GET CURRENT IDLE COUNT
+	DEC	A			; DECREMENT
+	LD	(IDLECOUNT),A		; SAVE UPDATED VALUE
+	CALL	Z,IDLE			; IF ZERO, DO IDLE PROCESSING
+	POP	AF			; RECOVER AF
+	RET
 ;
 ;==================================================================================================
 ;   DEVICE DRIVERS
diff --git a/Source/kbd.asm b/Source/kbd.asm
index a060cfbd..60d7c8b9 100644
--- a/Source/kbd.asm
+++ b/Source/kbd.asm
@@ -99,17 +99,8 @@ KBD_INIT:
 ;__________________________________________________________________________________________________
 ;
 KBD_STAT:
-	LD	A,(KBD_STATUS)		; GET STATUS
-	AND	KBD_KEYRDY		; ISOLATE READY BIT
-	JR	NZ,KBD_STAT3		; KEY READY, DONE
-
-KBD_STAT2:
-	CALL	Z,KBD_DECODE		; NOT READY, RUN THE DECODING ENGINE
-	LD	A,(KBD_STATUS)		; GET STATUS
-	AND	KBD_KEYRDY		; ISOLATE READ BIT
-
-KBD_STAT3:
-	RLCA				; ROTATE READY BIT TO LOW ORDER BIT
+	CALL	KBD_DECODE		; CHECK THE KEYBOARD
+	JP	Z,CIO_IDLE		; RET VIA IDLE PROCESSING IF NO KEY
 	RET
 ;
 ;__________________________________________________________________________________________________
@@ -120,13 +111,9 @@ KBD_STAT3:
 ;__________________________________________________________________________________________________
 ;
 KBD_READ:
-	LD	A,(KBD_STATUS)		; GET STATUS
-	AND	KBD_KEYRDY		; ISOLIATE KEY READY BIT
-	JR	NZ,KBD_READ1		; READY, GO GET THE KEY AND RETURN
-	CALL	KBD_DECODE		; TRY TO GET A KEY
-	JR	KBD_READ		; AND LOOP
+	CALL	KBD_STAT		; KEY READY?
+	JR	Z,KBD_READ		; NOT READY, KEEP TRYING
 ;
-KBD_READ1:
 	LD	A,(KBD_STATE)		; GET STATE
 	AND	$01			; ISOLATE EXTENDED SCANCODE BIT
 	RRCA				; ROTATE IT TO HIGH ORDER BIT
@@ -251,6 +238,15 @@ KBD_GETDATA1:
 	RET
 ;
 ;__________________________________________________________________________________________________
+KBD_GETDATAX:
+;
+; GET A RAW DATA BYTE FROM KEYBOARD INTERFACE INTO A WITH NOTIMEOUT
+;
+	CALL	KBD_IST			; GET INPUT REGISTER STATUS
+	RET	Z			; NOTHING THERE, DONE
+	JR	KBD_GETDATA1		; GO GET IT
+;
+;__________________________________________________________________________________________________
 ; RESET KEYBOARD
 ;__________________________________________________________________________________________________
 ;
@@ -417,10 +413,8 @@ KBD_DEC0:	; CHECK KEYCODE BUFFER
 	RET	NZ			; ABORT IF KEY IS ALREADY PENDING
 
 KBD_DEC1:	; PROCESS NEXT SCANCODE
-	CALL	KBD_IST			; IS A SCANCODE WAITING?
-	RET	Z			; NOPE, ABORT
-	CALL	KBD_GETDATA		; GET THE SCANCODE
-	RET	Z			; TIMEOUT, RETURN WITH A=0, Z SET
+	CALL	KBD_GETDATAX		; GET THE SCANCODE
+	RET	Z			; NO KEY READY, RETURN WITH A=0, Z SET
 	LD	(KBD_SCANCODE),A	; SAVE SCANCODE
 
 KBD_DEC2:	; DETECT AND HANDLE SPECIAL KEYCODES
diff --git a/Source/n8v.asm b/Source/n8v.asm
index aa7ca778..20f1dcd1 100644
--- a/Source/n8v.asm
+++ b/Source/n8v.asm
@@ -6,8 +6,7 @@
 ;======================================================================
 ;
 ; TODO:
-;   - IMPLEMENT CONSTANTS FOR SCREEN DIMENSIONS
-;   - IMPLEMENT SET CURSOR STYLE (VDASCS) FUNCTION
+;   - IMPLEMENT SET CURSOR STYLE (VDASCS) FUNCTION?
 ;   - IMPLEMENT ALTERNATE DISPLAY MODES?
 ;   - IMPLEMENT DYNAMIC READ/WRITE OF CHARACTER BITMAP DATA?
 ;
@@ -21,6 +20,12 @@ N8V_DATREG	.EQU	N8_BASE + $18	; READ/WRITE DATA
 N8V_ROWS	.EQU	24
 N8V_COLS	.EQU	40
 ;
+; BELOW WAS TUNED FOR N8 AT 18MHZ WITH 3 IO WAIT STATES
+; WILL NEED TO BE MODIFIED FOR DIFFERENT ACCESS SPEEDS
+; IF YOU SEE SCREEN CORRUPTION, ADJUST THIS!!!
+;
+#DEFINE		N8V_IODELAY	NOP \ NOP \ NOP \ NOP \ NOP \ NOP
+;
 ;======================================================================
 ; N8V DRIVER - INITIALIZATION
 ;======================================================================
@@ -41,6 +46,10 @@ N8V_RESET:
 	CALL	N8V_FILL		; DO IT
 	LD	DE,0			; ROW = 0, COL = 0
 	CALL	N8V_XY			; SEND CURSOR TO TOP LEFT
+	XOR	A
+	DEC	A
+	LD	(N8V_CURSAV),A
+	CALL	N8V_SETCUR		; SET CURSOR
 	
 	XOR	A			; SIGNAL SUCCESS
 	RET
@@ -130,7 +139,9 @@ N8V_VDASCS:
 	CALL	PANIC		; NOT IMPLEMENTED (YET)
 	
 N8V_VDASCP:
+	CALL	N8V_CLRCUR
 	CALL	N8V_XY		; SET CURSOR POSITION
+	CALL	N8V_SETCUR
 	XOR	A		; SIGNAL SUCCESS
 	RET
 	
@@ -143,42 +154,56 @@ N8V_VDASCO:
 	RET
 	
 N8V_VDAWRC:
+	CALL	N8V_CLRCUR	; CURSOR OFF
 	LD	A,E		; CHARACTER TO WRITE GOES IN A
 	CALL	N8V_PUTCHAR	; PUT IT ON THE SCREEN
+	CALL	N8V_SETCUR
 	XOR	A		; SIGNAL SUCCESS
 	RET
 	
 N8V_VDAFIL:
+	CALL	N8V_CLRCUR
 	LD	A,E		; FILL CHARACTER GOES IN A
 	EX	DE,HL		; FILL LENGTH GOES IN DE
 	CALL	N8V_FILL	; DO THE FILL
+	CALL	N8V_SETCUR
 	XOR	A		; SIGNAL SUCCESS
 	RET
 
 N8V_VDACPY:
+	CALL	N8V_CLRCUR
 	; LENGTH IN HL, SOURCE ROW/COL IN DE, DEST IS N8V_POS
 	; BLKCPY USES: HL=SOURCE, DE=DEST, BC=COUNT
 	PUSH	HL		; SAVE LENGTH
 	CALL	N8V_XY2IDX	; ROW/COL IN DE -> SOURCE ADR IN HL
 	POP	BC		; RECOVER LENGTH IN BC
 	LD	DE,(N8V_POS)	; PUT DEST IN DE
-	JP	N8V_BLKCPY	; DO A BLOCK COPY
+	CALL	N8V_BLKCPY	; DO A BLOCK COPY
+	CALL	N8V_SETCUR
+	XOR	A
+	RET
 	
 N8V_VDASCR:
+	CALL	N8V_CLRCUR
+N8V_VDASCR0:
 	LD	A,E		; LOAD E INTO A
 	OR	A		; SET FLAGS
-	RET	Z		; IF ZERO, WE ARE DONE
+	JR	Z,N8V_VDASCR2	; IF ZERO, WE ARE DONE
 	PUSH	DE		; SAVE E
 	JP	M,N8V_VDASCR1	; E IS NEGATIVE, REVERSE SCROLL
 	CALL	N8V_SCROLL	; SCROLL FORWARD ONE LINE
 	POP	DE		; RECOVER E
 	DEC	E		; DECREMENT IT
-	JR	N8V_VDASCR	; LOOP
+	JR	N8V_VDASCR0	; LOOP
 N8V_VDASCR1:
 	CALL	N8V_RSCROLL	; SCROLL REVERSE ONE LINE
 	POP	DE		; RECOVER E
 	INC	E		; INCREMENT IT
-	JR	N8V_VDASCR	; LOOP
+	JR	N8V_VDASCR0	; LOOP
+N8V_VDASCR2:
+	CALL	N8V_SETCUR
+	XOR	A
+	RET
 ;
 ;======================================================================
 ; N8V DRIVER - PRIVATE DRIVER FUNCTIONS
@@ -191,11 +216,11 @@ N8V_VDASCR1:
 ;
 N8V_SET:
 	OUT	(N8V_CMDREG),A		; WRITE IT
-	NOP
+	N8V_IODELAY
 	LD	A,C			; GET THE DESIRED REGISTER
 	OR	$80			; SET BIT 7 
 	OUT	(N8V_CMDREG),A		; SELECT THE DESIRED REGISTER
-	NOP
+	N8V_IODELAY
 	RET
 ;
 ;----------------------------------------------------------------------
@@ -214,10 +239,10 @@ N8V_WR:
 N8V_RD:
 	LD	A,L
 	OUT	(N8V_CMDREG),A
-	NOP
+	N8V_IODELAY
 	LD	A,H
 	OUT	(N8V_CMDREG),A
-	NOP
+	N8V_IODELAY
 	RET
 ;
 ;----------------------------------------------------------------------
@@ -285,6 +310,89 @@ N8V_LOADFONT3:
 	RET
 ;
 ;----------------------------------------------------------------------
+; VIRTUAL CURSOR MANAGEMENT
+;   N8V_SETCUR CONFIGURES AND DISPLAYS CURSOR AT CURRENT CURSOR LOCATION
+;   N8V_CLRCUR REMOVES THE CURSOR
+;
+; VIRTUAL CURSOR IS GENERATED BY DYNAMICALLY CHANGING FONT GLYPH
+; FOR CHAR 255 TO BE THE INVERSE OF THE GLYPH OF THE CHARACTER UNDER
+; THE CURRENT CURSOR POSITION.  THE CHARACTER CODE IS THEN SWITCH TO
+; THE VALUE 255 AND THE ORIGINAL VALUE IS SAVED.  WHEN THE DISPLAY
+; NEEDS TO BE CHANGED THE PROCESS IS UNDONE.  IT IS ESSENTIAL THAT
+; ALL DISPLAY CHANGES BE BRACKETED WITH CALLS TO N8V_CLRCUR PRIOR TO
+; CHANGES AND N8V_SETCUR AFTER CHANGES.
+;----------------------------------------------------------------------
+;
+N8V_SETCUR:
+	PUSH	HL			; PRESERVE HL
+	PUSH	DE			; PRESERVE DE
+	LD	HL,(N8V_POS)		; GET CURSOR POSITION
+	CALL	N8V_RD			; SETUP TO READ VDU BUF
+	IN	A,(N8V_DATREG)		; GET REAL CHAR UNDER CURSOR
+	N8V_IODELAY			; DELAY
+	PUSH	AF			; SAVE THE CHARACTER
+	CALL	N8V_WR			; SETUP TO WRITE TO THE SAME PLACE
+	LD	A,$FF			; REPLACE REAL CHAR WITH 255
+	OUT	(N8V_DATREG),A		; DO IT
+	N8V_IODELAY			; DELAY
+	POP	AF			; RECOVER THE REAL CHARACTER
+	LD	B,A			; PUT IT IN B
+	LD	A,(N8V_CURSAV)		; GET THE CURRENTLY SAVED CHAR
+	CP	B			; COMPARE TO CURRENT
+	JR	Z,N8V_SETCUR3		; IF EQUAL, BYPASS EXTRA WORK
+	LD	A,B			; GET REAL CHAR BACK TO A
+	LD	(N8V_CURSAV),A		; SAVE IT
+	; GET THE GLYPH DATA FOR REAL CHARACTER
+	LD	HL,0			; ZERO HL
+	LD	L,A			; HL IS NOW RAW CHAR INDEX
+	LD	B,3			; LEFT SHIFT BY 3 BITS
+N8V_SETCUR0:	; MULT BY 8 FOR FONT INDEX
+	SLA	L			; SHIFT LSB INTO CARRY
+	RL	H			; SHFT MSB FROM CARRY
+	DJNZ	N8V_SETCUR0		; LOOP 3 TIMES
+	LD	DE,$800			; OFFSET TO START OF FONT TABLE
+	ADD	HL,DE			; ADD TO FONT INDEX
+	CALL	N8V_RD			; SETUP TO READ GLYPH
+	LD	B,8			; 8 BYTES
+	LD	HL,N8V_BUF		; INTO BUFFER
+N8V_SETCUR1:	; READ GLYPH LOOP
+	IN	A,(N8V_DATREG)		; GET NEXT BYTE
+	N8V_IODELAY			; IO DELAY
+	LD	(HL),A			; SAVE VALUE IN BUF
+	INC	HL			; BUMP BUF POINTER
+	DJNZ	N8V_SETCUR1		; LOOP FOR 8 BYTES
+;
+	; NOW WRITE INVERTED GLYPH INTO FONT INDEX 255
+	LD	HL,$800 + (255 * 8)	; LOC OF GLPYPH DATA FOR CHAR 255
+	CALL	N8V_WR			; SETUP TO WRITE THE INVERTED GLYPH
+	LD	B,8			; 8 BYTES PER GLYPH
+	LD	HL,N8V_BUF		; POINT TO BUFFER
+N8V_SETCUR2:	; WRITE INVERTED GLYPH LOOP
+	LD	A,(HL)			; GET THE BYTE
+	INC	HL			; BUMP THE BUF POINTER
+	XOR	$FF			; INVERT THE VALUE
+	OUT	(N8V_DATREG),A		; WRITE IT TO VDU
+	N8V_IODELAY			; IO DELAY
+	DJNZ	N8V_SETCUR2		; LOOP FOR ALL 8 BYTES OF GLYPH
+;
+N8V_SETCUR3:	; RESTORE REGISTERS AND RETURN
+	POP	DE			; RECOVER DE
+	POP	HL			; RECOVER HL
+	RET				; RETURN
+;
+;
+;
+N8V_CLRCUR:	; REMOVE VIRTUAL CURSOR FROM SCREEN
+	PUSH	HL			; SAVE HL
+	LD	HL,(N8V_POS)		; POINT TO CURRENT CURSOR POS
+	CALL	N8V_WR			; SET UP TO WRITE TO VDU
+	LD	A,(N8V_CURSAV)		; GET THE REAL CHARACTER
+	OUT	(N8V_DATREG),A		; WRITE IT
+	N8V_IODELAY			; IO DELAY
+	POP	HL			; RECOVER HL
+	RET				; RETURN
+;
+;----------------------------------------------------------------------
 ; SET CURSOR POSITION TO ROW IN D AND COLUMN IN E
 ;----------------------------------------------------------------------
 ;
@@ -337,7 +445,7 @@ N8V_FILL:
 N8V_FILL1:
 	LD	A,C			; RECOVER CHARACTER TO WRITE
 	OUT	(N8V_DATREG),A
-	NOP \ NOP
+	N8V_IODELAY
 	DEC	DE
 	LD	A,D
 	OR	E
@@ -362,7 +470,7 @@ N8V_SCROLL0:	; READ LINE THAT IS ONE PAST CURRENT DESTINATION
 	LD	B,N8V_COLS
 N8V_SCROLL1:
 	IN	A,(N8V_DATREG)
-	NOP \ NOP
+	N8V_IODELAY
 	LD	(DE),A
 	INC	DE
 	DJNZ	N8V_SCROLL1
@@ -375,7 +483,7 @@ N8V_SCROLL1:
 N8V_SCROLL2:
 	LD	A,(DE)
 	OUT	(N8V_DATREG),A
-	NOP \ NOP
+	N8V_IODELAY
 	INC	DE
 	DJNZ	N8V_SCROLL2
 ;
@@ -391,7 +499,7 @@ N8V_SCROLL2:
 	LD	B,N8V_COLS
 N8V_SCROLL3:
 	OUT	(N8V_DATREG),A
-	NOP \ NOP \ NOP \ NOP
+	N8V_IODELAY
 	DJNZ	N8V_SCROLL3
 ;
 	RET
@@ -413,7 +521,7 @@ N8V_RSCROLL0:	; READ THE LINE THAT IS ONE PRIOR TO CURRENT DESTINATION
 	LD	B,N8V_COLS		; LOOP FOR EACH COLUMN
 N8V_RSCROLL1:
 	IN	A,(N8V_DATREG)		; GET THE CHAR
-	NOP \ NOP			; RECOVER
+	N8V_IODELAY			; RECOVER
 	LD	(DE),A			; SAVE IN BUFFER
 	INC	DE			; BUMP BUFFER POINTER
 	DJNZ	N8V_RSCROLL1		; LOOP THRU ALL COLS
@@ -426,7 +534,7 @@ N8V_RSCROLL1:
 N8V_RSCROLL2:
 	LD	A,(DE)			; LOAD THE CHAR
 	OUT	(N8V_DATREG),A		; WRITE TO SCREEN
-	NOP \ NOP			; DELAY
+	N8V_IODELAY			; DELAY
 	INC	DE			; BUMP BUF POINTER
 	DJNZ	N8V_RSCROLL2		; LOOP THRU ALL COLS
 ;
@@ -442,7 +550,7 @@ N8V_RSCROLL2:
 	LD	B,N8V_COLS
 N8V_RSCROLL3:
 	OUT	(N8V_DATREG),A
-	NOP \ NOP \ NOP \ NOP
+	N8V_IODELAY
 	DJNZ	N8V_RSCROLL3
 ;
 	RET
@@ -463,7 +571,7 @@ N8V_BLKCPY1:
 	LD	B,C
 N8V_BLKCPY2:
 	IN	A,(N8V_DATREG)	; GET THE NEXT BYTE
-	NOP \ NOP		; DELAY
+	N8V_IODELAY		; DELAY
 	LD	(DE),A		; SAVE IN BUFFER
 	INC	DE		; BUMP BUF PTR
 	DJNZ	N8V_BLKCPY2	; LOOP AS NEEDED
@@ -477,7 +585,7 @@ N8V_BLKCPY2:
 N8V_BLKCPY3:
 	LD	A,(DE)		; GET THE CHAR FROM BUFFER
 	OUT	(N8V_DATREG),A	; WRITE TO VDU
-	NOP \ NOP		; DELAY
+	N8V_IODELAY		; DELAY
 	INC	DE		; BUMP BUF PTR
 	DJNZ	N8V_BLKCPY3	; LOOP AS NEEDED
 ;
@@ -488,7 +596,8 @@ N8V_BLKCPY3:
 ;==================================================================================================
 ;
 N8V_POS		.DW 	0	; CURRENT DISPLAY POSITION
-N8V_BUF		.FILL	256,0		; COPY BUFFER
+N8V_CURSAV	.DB	0	; SAVES ORIGINAL CHARACTER UNDER CURSOR
+N8V_BUF		.FILL	256,0	; COPY BUFFER
 ;
 ;==================================================================================================
 ;   N8V DRIVER - TMS9918 REGISTER INITIALIZATION
diff --git a/Source/ppk.asm b/Source/ppk.asm
index 64d6da5a..cd3764c7 100644
--- a/Source/ppk.asm
+++ b/Source/ppk.asm
@@ -93,28 +93,19 @@ PPK_INIT:
 ;
 ; CHECKING THE KEYBOARD REQUIRES "WAITING" FOR A KEY TO BE SENT AND USING A TIMEOUT
 ; TO DETECT THAT NO KEY IS READY.  MANY APPS CALL STATUS REPEATEDLY.  IN ORDER TO AVOID
-; SLOWING THEM DOWN, WE IGNORE 1/256 OF THE CALLS.
+; SLOWING THEM DOWN, WE IGNORE 255/256 OF THE CALLS.
 ;
 PPK_STAT:
-	LD	A,(PPK_STATUS)		; GET STATUS
-	AND	PPK_KEYRDY		; ISOLATE READY BIT
-	JR	NZ,PPK_STAT3		; KEY READY, DONE
-
-PPK_STAT1:
 	LD	A,(PPK_IDLE)		; GET IDLE COUNT
 	DEC	A			; DECREMENT IT
 	LD	(PPK_IDLE),A		; SAVE IT
-	JR	Z,PPK_STAT2		; ZERO?  OK, DO A REAL KEY CHECK
-	XOR	A			; RETURN KEY NOT READY
-	RET
-
-PPK_STAT2:
-	CALL	Z,PPK_DECODE		; NOT READY, RUN THE DECODING ENGINE
-	LD	A,(PPK_STATUS)		; GET STATUS
-	AND	PPK_KEYRDY		; ISOLATE READ BIT
-
-PPK_STAT3:
-	RLCA				; ROTATE READY BIT TO LOW ORDER BIT
+	JR	Z,PPK_STAT1		; IF ZERO, DO REAL CHECK
+	XOR	A			; SIGNAL NOTHING READY
+	JP	CIO_IDLE		; RETURN VIA IDLE PROCESSING
+;
+PPK_STAT1:
+	CALL	PPK_DECODE		; CHECK THE KEYBOARD
+	JP	Z,CIO_IDLE		; RET VIA IDLE PROCESSING IF NO KEY
 	RET
 ;
 ;__________________________________________________________________________________________________
@@ -125,14 +116,9 @@ PPK_STAT3:
 ;__________________________________________________________________________________________________
 ;
 PPK_READ:
-;	CALL	PPK_STAT		; CHECK TO SEE IF KEY READY
-	LD	A,(PPK_STATUS)		; GET STATUS
-	AND	PPK_KEYRDY		; ISOLIATE KEY READY BIT
-	JR	NZ,PPK_READ1		; READY, GO GET THE KEY AND RETURN
-	CALL	PPK_DECODE		; TRY TO GET A KEY
-	JR	PPK_READ		; AND LOOP
+	CALL	PPK_STAT		; KEY READY?
+	JR	Z,PPK_READ		; NOT READY, KEEP TRYING
 ;
-PPK_READ1:
 	LD	A,(PPK_STATE)		; GET STATE
 	AND	$01			; ISOLATE EXTENDED SCANCODE BIT
 	RRCA				; ROTATE IT TO HIGH ORDER BIT
@@ -205,6 +191,15 @@ PPK_GETDATA2:
 	RET
 ;
 ;__________________________________________________________________________________________________
+PPK_GETDATAX:
+;
+; GET A RAW DATA BYTE FROM KEYBOARD INTERFACE INTO A WITH NOTIMEOUT
+; IN THE CASE OF PPK, THERE IS NO QUICK WAY TO CHECK FOR A KEY WAITING,
+; SO WE JUST CHAIN TO GETDATA
+;
+	JR	PPK_GETDATA		; CHAIN TO GETDATA
+;
+;__________________________________________________________________________________________________
 PPK_PUTDATA:
 ;
 ; PUT A RAW BYTE FROM A TO THE KEYBOARD INTERFACE
@@ -519,8 +514,8 @@ PPK_DEC0:	; CHECK KEYCODE BUFFER
 	RET	NZ			; ABORT IF KEY IS ALREADY PENDING
 
 PPK_DEC1:	; PROCESS NEXT SCANCODE
-	CALL	PPK_GETDATA		; GET THE SCANCODE
-	RET	Z			; TIMEOUT, RETURN WITH A=0, Z SET
+	CALL	PPK_GETDATAX		; GET THE SCANCODE
+	RET	Z			; NO KEY READY, RETURN WITH A=0, Z SET
 	LD	(PPK_SCANCODE),A	; SAVE SCANCODE
 
 PPK_DEC2:	; DETECT AND HANDLE SPECIAL KEYCODES
diff --git a/Source/prp.asm b/Source/prp.asm
index 5abd7546..a4f3e11f 100644
--- a/Source/prp.asm
+++ b/Source/prp.asm
@@ -56,7 +56,8 @@ PRPCON_IST:
 	AND	PRPCON_KBDRDY | PRPCON_BUSY	; ISOLATE KBDRDY AND BUSY
 	SUB	PRPCON_KBDRDY		; KBD RDY BUT NOT BUSY?
 	JR	Z,PRPCON_IST1		; YES, GO TO READY LOGIC
-	JP	CIO_IDLE
+	XOR	A			; SIGNAL NO CHARS WAITING
+	JP	CIO_IDLE		; RETURN VIA IDLE PROCESSING
 PRPCON_IST1:
 	DEC	A			; SET A=$FF TO SIGNAL READY
 	RET				; RETURN
@@ -75,7 +76,8 @@ PRPCON_OST:
 	AND	PRPCON_DSPRDY | PRPCON_BUSY	; ISOLATE DSPRDY AND BUSY
 	SUB	PRPCON_DSPRDY		; DSP RDY BUT NOT BUSY?
 	JR	Z,PRPCON_OST1		; YES, GO TO READY LOGIC
-	JP	CIO_IDLE
+	XOR	A			; SIGNAL NO CHARS WAITING
+	JP	CIO_IDLE		; RETURN VIA IDLE PROCESSING
 PRPCON_OST1:
 	DEC	A			; SET A=$FF TO SIGNAL READY
 	RET				; RETURN
diff --git a/Source/uart.asm b/Source/uart.asm
index 4768013b..832dfd36 100644
--- a/Source/uart.asm
+++ b/Source/uart.asm
@@ -105,8 +105,6 @@ UART_INIT:
 	LD	HL,BAUDRATE % 100
 	CALL	PRTDEC
 	
-	CALL	PC_SPACE
-
 	LD	A,80H
 	OUT	(SIO_LCR),A		; DLAB ON
 	LD	A,UART0_DIV
diff --git a/Source/util.asm b/Source/util.asm
index 83a487ee..611c5291 100644
--- a/Source/util.asm
+++ b/Source/util.asm
@@ -283,6 +283,8 @@ PANIC:
 	
 	RST	38
 	
+	HALT
+	
 	JP	0
 ;
 ;==================================================================================================
diff --git a/Source/ver.inc b/Source/ver.inc
index 98fc82e4..44e3da18 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -1,6 +1,6 @@
 #DEFINE	RMJ	2
 #DEFINE	RMN	5
 #DEFINE	RUP	0
-#DEFINE	RTP	6
-#DEFINE BIOSVER	"2.5 - Beta 6"
+#DEFINE	RTP	7
+#DEFINE BIOSVER	"2.5 - Beta 7"
 #DEFINE REVISION 412