API Revisions / Cleanup

- Improved banked copy size and performance
- Revised API for SETCPY, BNKCPY, SETBNK, and GETBNK

Source/Apps/OSLdr.asm

@@ -247,6 +247,7 @@ init1:
 	ld	(biover),hl	; save version
 	ld	b,bfgbnk	; HBIOS func: get current bank
 	rst	08		; do it
+	ld	a,c		; move to A
 	ld	(tpabnk),a	; save it
 
 init2:

Source/CBIOS/cbios.asm

@@ -313,13 +313,16 @@ WBOOT:
 	RST	08		; DO IT
 #ELSE
 	; RESTORE COMMAND PROCESSOR FROM CACHE IN HB BANK
-	LD	B,BF_SYSXCPY	; HBIOS FUNC: SYSTEM EXTENDED COPY
+	;LD	B,BF_SYSXCPY	; HBIOS FUNC: SYSTEM EXTENDED COPY
+	LD	B,BF_SYSSETCPY	; HBIOS FUNC: SETUP BANK COPY
 	LD	DE,(BNKBIOS)	; D = DEST (USER BANK), E = SRC (BIOS BANK)
-	RST	08		; SET BANKS FOR INTERBANK COPY
-	LD	B,BF_SYSCPY	; HBIOS FUNC: SYSTEM COPY
+	LD	HL,CCP_SIZ	; HL = COPY LEN = SIZE OF COMMAND PROCESSOR
+	RST	08		; DO IT
+	;LD	B,BF_SYSCPY	; HBIOS FUNC: SYSTEM COPY
+	LD	B,BF_SYSBNKCPY	; HBIOS FUNC: PERFORM BANK COPY
 	LD	HL,(CCPBUF)	; COPY FROM FIXED LOCATION IN HB BANK
 	LD	DE,CCP_LOC	; TO CCP LOCATION IN USR BANK
-	LD	IX,CCP_SIZ	; COPY CONTENTS OF COMMAND PROCESSOR
+	;LD	IX,CCP_SIZ	; COPY CONTENTS OF COMMAND PROCESSOR
 	RST	08		; DO IT
 #ENDIF
 ;
@@ -1056,19 +1059,22 @@ BLK_BLOCK:
 	LDIR
 	RET
 #ELSE
-	LD	B,BF_SYSXCPY	; HBIOS FUNC: SYSTEM EXTENDED COPY
+	;LD	B,BF_SYSXCPY	; HBIOS FUNC: SYSTEM EXTENDED COPY
+	LD	B,BF_SYSSETCPY	; HBIOS FUNC: SETUP BANK COPY
 	LD	A,(BNKUSER)	; GET USER BANK
 	LD	E,A		; E = SOURCE (USER BANK)
 	LD	A,(BNKBIOS)	; GET DEST BANK
 	LD	D,A		; D = DEST (BIOS BANK)
-	RST	08		; SET BANKS FOR INTERBANK COPY
-	CALL	BLK_SETUP	; SETUP SOURCE AND DESTINATION
-	LD	B,BF_SYSCPY	; HBIOS FUNC: SYSTEM COPY
-	EX	DE,HL		; SWAP HL/DE FOR BLOCK OPERATION
-	PUSH	IX		; SAVE IX
-	LD	IX,128		; DMA BUFFER SIZE
+	LD	HL,128		; HL = COPY LEN = DMA BUFFER SIZE
 	RST	08		; DO IT
-	POP	IX		; RESTORE IX
+	CALL	BLK_SETUP	; SETUP SOURCE AND DESTINATION
+	;LD	B,BF_SYSCPY	; HBIOS FUNC: SYSTEM COPY
+	LD	B,BF_SYSBNKCPY	; HBIOS FUNC: PERFORM BANK COPY
+	EX	DE,HL		; SWAP HL/DE FOR BLOCK OPERATION
+	;PUSH	IX		; SAVE IX
+	;LD	IX,128		; DMA BUFFER SIZE
+	RST	08		; DO IT
+	;POP	IX		; RESTORE IX
 	RET
 #ENDIF
 ;
@@ -1083,15 +1089,18 @@ BLK_DEBLOCK:
 	LDIR
 	RET
 #ELSE
-	LD	B,BF_SYSXCPY	; HBIOS FUNC: SYSTEM EXTENDED COPY
+	;LD	B,BF_SYSXCPY	; HBIOS FUNC: SYSTEM EXTENDED COPY
+	LD	B,BF_SYSSETCPY	; HBIOS FUNC: SETUP BANK COPY
 	LD	DE,(BNKBIOS)	; E = SOURCE (BIOS BANK), D = DEST (USER BANK)
+	LD	HL,128		; HL = COPY LEN = DMA BUFFER SIZE
 	RST	08		; DO IT
 	CALL	BLK_SETUP	; SETUP SOURCE AND DESTINATION
-	LD	B,BF_SYSCPY	; HBIOS FUNC: SYSTEM COPY
-	PUSH	IX		; SAVE IX
-	LD	IX,128		; DMA BUFFER SIZE
+	;LD	B,BF_SYSCPY	; HBIOS FUNC: SYSTEM COPY
+	LD	B,BF_SYSBNKCPY	; HBIOS FUNC: PERFORM BANK COPY
+	;PUSH	IX		; SAVE IX
+	;LD	IX,128		; DMA BUFFER SIZE
 	RST	08		; DO IT
-	POP	IX		; RESTORE IX
+	;POP	IX		; RESTORE IX
 	RET
 #ENDIF
 ;
@@ -1259,14 +1268,13 @@ DSK_WRITE:
 #IFDEF PLTUNA
 
 DSK_IO:
-DSK_IO1:
 	PUSH	BC
 	LD	DE,(HSTTRK)	; GET TRACK INTO HL
 	LD	B,4		; PREPARE TO LEFT SHIFT BY 4 BITS
-DSK_IO2:
+DSK_IO1:
 	SLA	E		; SHIFT DE LEFT BY 4 BITS
 	RL	D
-	DJNZ	DSK_IO2		; LOOP TILL ALL BITS DONE
+	DJNZ	DSK_IO1		; LOOP TILL ALL BITS DONE
 	LD	A,(HSTSEC)	; GET THE SECTOR INTO A
 	AND	$0F		; GET RID OF TOP NIBBLE
 	OR	E		; COMBINE WITH E
@@ -1319,13 +1327,16 @@ CHS:
 	CP	DIODEV_FD		; FLOPPY?
 	JR	NZ,CHSHD		; IF NOT, DO HD CHS XLAT
 ;
-; FLOPPY SPECIFIC TRANSLATION
-; CURRENTLY LEAVES HEAD VALUE IMBEDDED IN
-; TRACK WHICH HBIOS FD DRIVER HANDLES
+; FLOPPY SPECIFIC TRANSLATION ASSUMES FLOPPY IS DOUBLE-SIDED AND
+; USES LOW ORDER BIT OF TRACK AS HEAD VALUE
+; 
+; HBIOS SEEK: HL=CYLINDER, D=HEAD, E=SECTOR
 ;
-
-	LD	DE,(HSTSEC)		; SECTOR DE, HEAD(D) BECOMES ZERO
-	LD	HL,(HSTTRK)		; TRACK -> TRACK (LOW BIT HAS HEAD)
+	LD	DE,(HSTSEC)		; SECTOR -> DE, HEAD(D) BECOMES ZERO
+	LD	HL,(HSTTRK)		; TRACK -> HL (LOW BIT HAS HEAD)
+	SRL	H			; SHIFT HEAD BIT OUT OF HL
+	RR	L			; ... AND INTO CARRY
+	RL	D			; CARRY BIT (HEAD) INTO D
 	JR	CHS2
 ;
 ; HARD DISK SPECIFIC TRANSLATION
@@ -1811,16 +1822,19 @@ INIT:
 	LD	(9),HL			; STORE AT 0x0009
 
 	; CREATE A TEMP COPY OF THE HBIOS CONFIG BLOCK (HCB)
-	; FOR USE DURING INIT
-	LD	B,BF_SYSXCPY		; HBIOS FUNC: SYSTEM EXTENDED COPY
+	; FOR REFERENCE USE DURING INIT
+	;LD	B,BF_SYSXCPY		; HBIOS FUNC: SYSTEM EXTENDED COPY
+	LD	B,BF_SYSSETCPY		; HBIOS FUNC: SETUP BANK COPY
 	LD	DE,(BNKBIOS)		; D = DEST (USER BANK), E = SOURCE (BIOS BANK)
-	RST	08			; SET BANKS FOR INTERBANK COPY
-	LD	B,BF_SYSCPY		; HBIOS FUNC: SYSTEM COPY
+	LD	HL,HCB_SIZ		; HL = COPY LEN = SIZE OF HCB
+	RST	08			; DO IT
+	;LD	B,BF_SYSCPY		; HBIOS FUNC: SYSTEM COPY
+	LD	B,BF_SYSBNKCPY		; HBIOS FUNC: PERFORM BANK COPY
 	LD	HL,HCB_LOC		; COPY FROM FIXED LOCATION IN HB BANK
 	LD	DE,HCB			; TO TEMP LOCATION IN USR BANK
-	LD	IX,HCB_SIZ		; COPY CONTENTS OF HCB
+	;LD	IX,HCB_SIZ		; COPY CONTENTS OF HCB
 	RST	08			; DO IT
-	
+
 	; CAPTURE RAM DRIVE STARTING BANK
 	LD	A,(HCB + HCB_BIDRAMD0)
 	LD	(BNKRAMD),A
@@ -1861,22 +1875,25 @@ INIT:
 	POP	DE		; RECOVER OPERATING BANK
 	RST	08		; DO IT
 #ELSE
-	; SAVE COMMAND PROCESSOR TO DEDICATED CACHE IN RAM BANK 1
+	; SAVE COMMAND PROCESSOR TO ALLOCATED CACHE IN RAM BANK 1
 	LD	B,BF_SYSALLOC	; HBIOS FUNC: ALLOCATE HEAP MEMORY
 	LD	HL,CCP_SIZ	; SIZE TO ALLOC (SIZE OF CCP)
 	RST	08		; DO IT
 	CALL	NZ,PANIC	; BIG PROBLEM
 	LD	(CCPBUF),HL	; SAVE THE ADDRESS (IN BIOS MEM)
-	LD	B,BF_SYSXCPY	; HBIOS FUNC: SYSTEM EXTENDED COPY
+	;LD	B,BF_SYSXCPY	; HBIOS FUNC: SYSTEM EXTENDED COPY
+	LD	B,BF_SYSSETCPY	; HBIOS FUNC: SETUP BANK COPY
 	LD	A,(BNKUSER)	; GET USER BANK
 	LD	E,A		; E = SOURCE (USER BANK)
 	LD	A,(BNKBIOS)	; GET BIOS BANK
 	LD	D,A		; D = DEST (BIOS BANK)
+	LD	HL,CCP_SIZ	; HL = COPY LEN = SIZE OF COMMAND PROCESSOR
 	RST	08		; DO IT
-	LD	B,BF_SYSCPY	; HBIOS FUNC: SYSTEM COPY
+	;LD	B,BF_SYSCPY	; HBIOS FUNC: SYSTEM COPY
+	LD	B,BF_SYSBNKCPY	; HBIOS FUNC: PERFORM BANK COPY
 	LD	HL,CCP_LOC	; COPY FROM CCP LOCATION IN USR BANK
 	LD	DE,(CCPBUF)	; TO ALLOCATED LOCATION IN HB BANK
-	LD	IX,CCP_SIZ	; COPY CONTENTS OF COMMAND PROCESSOR
+	;LD	IX,CCP_SIZ	; COPY CONTENTS OF COMMAND PROCESSOR
 	RST	08		; DO IT
 #ENDIF
 

Source/CBIOS/util.asm

@@ -140,16 +140,16 @@ _REGDMP:
 	LD	(REGDMP_PC),HL		; SAVE PC VALUE
 	EX	(SP),HL			; BACK THE WAY IT WAS
 
-	LD	(UTSTKSAV),SP		; SAVE ORIGINAL STACK POINTER
-	LD	SP,UTPRVSTK		; SWITCH TO PRIVATE STACK
+	LD	(REGDMP_SP),SP		; SAVE STACK POINTER
+
+	;LD	(RD_STKSAV),SP		; SAVE ORIGINAL STACK POINTER
+	;LD	SP,RD_STACK		; SWITCH TO PRIVATE STACK
 
 	PUSH	AF
 	PUSH	BC
 	PUSH	DE
 	PUSH	HL
 
-	CALL	PC_LBKT
-
 	PUSH	AF
 	LD	A,'@'
 	CALL	COUT
@@ -157,9 +157,9 @@ _REGDMP:
 	
 	PUSH	BC
 	LD	BC,(REGDMP_PC)
-	CALL	PRTHEXWORD
+	CALL	PRTHEXWORD		; PC
 	POP	BC
-	CALL	PC_COLON
+	CALL	PC_LBKT
 	PUSH	BC
 	PUSH	AF
 	POP	BC
@@ -176,7 +176,7 @@ _REGDMP:
 	POP	BC
 	CALL	PRTHEXWORD		; HL
 	CALL	PC_COLON
-	LD	BC,(UTSTKSAV)
+	LD	BC,(REGDMP_SP)
 	CALL	PRTHEXWORD		; SP
 
 	CALL	PC_RBKT
@@ -187,12 +187,17 @@ _REGDMP:
 	POP	BC
 	POP	AF
 
-	LD	SP,(UTSTKSAV)		; BACK TO ORIGINAL STACK FRAME
+	;LD	SP,(RD_STKSAV)		; BACK TO ORIGINAL STACK FRAME
 	
 	JP	$FFFF			; RETURN, $FFFF IS DYNAMICALLY UPDATED
 REGDMP_RET	.EQU	$-2		; RETURN ADDRESS GOES HERE
 ;
 REGDMP_PC	.DW	0
+REGDMP_SP	.DW	0
+;
+;RD_STKSAV	.DW	0
+;		.FILL	$FF,16*2	; 16 LEVEL PRIVATE STACK
+;RD_STACK	.EQU	$
 ;
 ;
 ;
@@ -425,9 +430,3 @@ PRTHEXBUF1:
 	INC	DE
 	DJNZ	PRTHEXBUF1
 	RET
-;
-; PRIVATE STACK
-;
-UTSTKSAV	.DW	0
-		.FILL	$FF,64		; 32 LEVEL PRIVATE STACK SPACE
-UTPRVSTK	.EQU	$

Source/CBIOS/ver.inc

@@ -1,5 +1,5 @@
 #DEFINE	RMJ	2
-#DEFINE	RMN	7
-#DEFINE	RUP	1
+#DEFINE	RMN	8
+#DEFINE	RUP	0
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"2.7.1"
+#DEFINE BIOSVER	"2.8.0-pre.1"

Source/HBIOS/API.txt

@@ -2,7 +2,39 @@
 HBIOS Management Functions
 ==========================
 
-GET ($07):
+SETBNK ($F0):
+  B=Function                       		A=Result
+  C=Bank Id					C=Previous Bank Id
+
+GETBNK ($F1):
+  B=Function                       		A=Result
+						C=Bank Id
+
+SETCPY ($F2):
+  B=Function                       		A=Result
+  D=Destination Bank Id
+  E=Source Bank Id
+  HL=Count of Bytes to Copy
+
+BNKCPY ($F3):
+  B=Function                       		A=Result
+  DE=Destination Address
+  HL=Source Address
+
+ALLOC ($F4):
+  B=Function                       		A=Result
+  HL=Size					HL=Address of Allocated Memory Block
+
+FREE ($F5):
+  B=Function                       		A=Result
+  HL=Address of Memory Block to Free
+
+VER ($F6):
+  B=Function                       		A=Result
+  C=Reserved (set to 0)				DE=Version (Maj/Min/Upd/Pat)
+						L=Platform Id
+
+GET ($F7):
   BC=Function/Subfunction                       A=Result
 
   Subfunctions:
@@ -40,7 +72,7 @@ GET ($07):
                                                 D=BIOS Bank Id
                                                 E=User Bank Id
 
-SET ($08):
+SET ($F8):
   BC=Function/Subfunction                       A=Result
 
     BOOTINFO ($E0):
@@ -48,6 +80,17 @@ SET ($08):
                                                 L=Boot Bank Id
                                                 DE=Boot Volume (Disk Unit/Slice)
 
+PEEK: ($F9):
+  B=Function                       		A=Result
+  D=Bank					E=Byte Value
+  HL=Address
+
+POKE: ($FA):
+  B=Function                       		A=Result
+  D=Bank
+  E=Byte Value
+  HL=Address
+
 ================
 Serial Functions
 ================
@@ -76,18 +119,22 @@ OST ($03):
 INIT ($04):
   BC=Function/Unit                      A=Result
   DE=Line Characteristics
-  L=Terminal Type
+  L=Terminal Type?
 
 QUERY ($05)
   BC=Function/Unit                      A=Result
                                         DE=Line Characteristics (Baud, Flow Control, etc.)
-                                        H=Device Type (RS-232, Terminal, etc.)
-                                        L=Terminal Type (TTY, VT-102, etc.)
+					L=Terminal Type? (TTY, VT-100, etc.)
 
 DEVICE ($06):
   BC=Function/Unit                      A=Result
                                         D=Device Type
                                         E=Device Number
+					C=Device Attributes
+
+  Serial Device Attributes Byte:
+    ;7: 1=Floppy, 0=Hard Disk (or similar, e.g. CF, SD, RAM)
+
                                         H=Media Type (RS-232, Terminal, etc.)
                                         L=Video Unit Id (if Media Type == VDA)
 
@@ -141,13 +188,13 @@ DEVICE ($17)
   BC=Function/Unit                      A=Result
                                         D=Device Type (MD, FD, IDE, etc.)
                                         E=Device Number (0..n)
-					C=Disk Attributes
+					C=Device Attributes
 
   Report the Device Type (Floppy, IDE, SD, etc.) and Device Number.  Call
   does not perform any I/O and succeeds even if the device is in an error state.
   It does not reset the unit status.
 
-  Disk Device Attribute Byte:
+  Disk Device Attributes Byte:
     7: 1=Floppy, 0=Hard Disk (or similar, e.g. CF, SD, RAM)
   
     If Floppy:
@@ -182,7 +229,7 @@ CAPACITY ($1A):
                                         BC=Block Size
                                         A=Result
 
-  Return device capacity information.
+  Report current media capacity information.
   If media is unknown, return error (no media)
 
 GEOMETRY ($1B):
@@ -193,16 +240,9 @@ GEOMETRY ($1B):
                                         BC=Block Size
                                         A=Result
 
-  Return device geometry information.
+  Report current media geometry information.
   If media is unknown, return error (no media)
 
-INFO ($1F):
-    BC=Function/Sub-function            A=Result
-
-  C=0: Report total unit count in system:
-    BC=Function/Sub-function            A=Result
-                                        B=Count
-
 ===============
 Video Functions
 ===============
@@ -227,11 +267,11 @@ Serial 0    UART0:      RS-232            38400,8N1,HFC
 Serial 1    PRPCON0:    Direct            --
 Serial 2    CVDU0:      Direct            --
 Serial 2    VDU0:       Direct            --
-Serial 2    SCG0:       Direct            --
+Serial 2    TMS0:       Direct            --
 Video 0     PRPCON0:    VDA               Text 80x25, ANSI
 Video 1     CVDU0:      VDA               Text 80x25, ANSI
 Video 2     VDU0:       VDA               Text 80x25, ANSI
-Video 3     SCG0:       VDA               Text 40x25, TTY
+Video 3     TMS0:       VDA               Text 40x25, TTY
 
 Unit: Function Group & Unit Index
 Device: <driver>_DEVICE Device Type & Device Num

Source/HBIOS/Config/mk4_cvdu.asm

@@ -27,8 +27,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_ASCIB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	TRUE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/mk4_diskio3.asm

@@ -27,8 +27,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_ASCIB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/mk4_dsd.asm

@@ -27,8 +27,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_ASCIB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/mk4_propio.asm

@@ -27,8 +27,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_ASCIB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/mk4_std.asm

@@ -27,8 +27,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_ASCIB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/n8_2312.asm

@@ -27,8 +27,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_ASCIB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	TRUE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	TRUE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/n8_2511.asm

@@ -27,8 +27,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_ASCIB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	TRUE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	TRUE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_ci.asm

@@ -37,8 +37,9 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NEC		
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_cvdu.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	TRUE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_dide.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_diskio.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_diskio3+cvdu.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	TRUE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_diskio3.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_dsd.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_mfpic.asm

@@ -37,8 +37,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_ppide.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_ppisd.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_propio.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_rf.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_simh.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_std.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/sbc_vdu.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	TRUE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/zeta2_ppide.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/zeta2_ppisd.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/zeta2_ppp.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/zeta2_std.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/zeta_ppide.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/zeta_ppisd.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/zeta_ppp.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/Config/zeta_std.asm

@@ -32,8 +32,8 @@ ASCI1BAUD	.EQU	CONBAUD		; ASCI1 BAUDRATE (IMPLEMENTED BY Z180_CNTLB1)
 ;
 VDUENABLE	.EQU	FALSE		; TRUE FOR VDU BOARD SUPPORT
 CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
-UPD7220ENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
-SCGENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
+NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
+TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 ;
 MDENABLE	.EQU	TRUE		; TRUE FOR ROM/RAM DISK SUPPORT (ALMOST ALWAYS WANT THIS ENABLED)
 MDTRACE		.EQU	1		; 0=SILENT, 1=ERRORS, 2=EVERYTHING (ONLY RELEVANT IF MDENABLE = TRUE)

Source/HBIOS/ansi.asm

@@ -199,20 +199,14 @@ ANSI_CIOOST:	; VIDEO OUTPUT IS *ALWAYS* READY
 ; INITIALIZE
 ;
 ANSI_CIOINIT:
-	; SETUP AND FORWARD CALL TO PARENT VDA DRIVER'S VDAINIT FUNCTION
-	LD	B,BF_VDAINI	; WE ARE FORWARDING TO VDAINIT FUNCTION
-	LD	A,(ANSI_DEVTYPE)	; GET DEVICE TYPE WE ARE EMULATING FOR
-	LD	C,A		; AND PUT IT IN C
-	LD	D,L		; TERMTYPE TO D
-	LD	E,0		; VIDEO MODE = 0
-	LD	HL,0		; NO BITMAP, LEAVE IT ALONG
-	JP	ANSI_VDADISP	; LET VDA DRIVER HANDLE IT FROM HERE
+	XOR	A		; NOTHING TO DO, SIGNAL SUCCESS
+	RET			; ... AND RETURN
 ;
 ; QUERY STATUS
 ;
 ANSI_CIOQUERY:
-	LD	DE,0
-	LD	HL,0
+	LD	DE,$FFFF
+	LD	HL,$FFFF
 	XOR	A
 	RET
 ;

Source/HBIOS/asci.asm

@@ -229,7 +229,8 @@ ASCI0_OST:
 ;
 ;
 ASCI0_INITDEV:
-	CALL	PANIC
+	XOR	A			; NOT IMPLEMENTED!!!
+	RET
 ;
 ;
 ;
@@ -320,7 +321,8 @@ ASCI1_OST:
 ;
 ;
 ASCI1_INITDEV:
-	CALL	PANIC
+	XOR	A			; NOT IMPLEMENTED!!!
+	RET
 ;
 ;
 ;

Source/HBIOS/cvdu_font.asm

@@ -511,6 +511,7 @@ CVDU_FONTDATA:
   .DB     $00,$00,$00,$00,$00,$00,$00,$00
   .DB     $0F,$0F,$0F,$0F,$FF,$FF,$FF,$FF
   .DB     $00,$00,$00,$00,$00,$00,$00,$00
+#IF 1
   .DB     $0F,$0F,$0F,$0F,$F0,$F0,$F0,$F0
   .DB     $00,$00,$00,$00,$00,$00,$00,$00
   .DB     $3C,$66,$6E,$6E,$60,$62,$3C,$00
@@ -1023,3 +1024,4 @@ CVDU_FONTDATA:
   .DB     $00,$00,$00,$00,$00,$00,$00,$00
   .DB     $0F,$0F,$0F,$0F,$FF,$FF,$FF,$FF
   .DB     $00,$00,$00,$00,$00,$00,$00,$00
+#ENDIF

Source/HBIOS/fd.asm

@@ -808,13 +808,10 @@ FD_RUN:
 	;CALL	FD_SELECTUNIT
 	
 	; MAP HSTTRK TO FCD_H, FCD_C
-	LD	BC,(HSTTRK)
-	LD	A,C			; HEAD IS LOW ORDER BIT
-	AND	1			; ISOLATE IT
-	LD	(FCD_H),A		; SAVE IT
-	LD	A,C			; LOAD TRACK IN A
-	SRL	A			; DIVIDE BY 2 FOR PHYSICAL TRACK
-	LD	(FCD_C),A		; SAVE IT
+	LD	A,(HSTTRK)		; GET TRACK VALUE (CYLINDER IS MORE ACCURATE)
+	LD	(FCD_C),A		; ... AND MOVE IT TO CYL PARM
+	LD	A,(HSTHEAD)		; GET HEAD VALUE
+	LD	(FCD_H),A		; ... AND MOVE IT TO HEAD PARM
 
 	; MAP HSTSEC TO FCD_R
 	LD	BC,(HSTSEC)

Source/HBIOS/hbios.asm

@@ -174,6 +174,7 @@ HBX_BNKSEL1:
 ; Copy Data - Possibly between banks.  This resembles CP/M 3, but
 ;  usage of the HL and DE registers is reversed.
 ; Caller MUST ensure stack is already in high memory.
+; Caller MUST preset HBX_SRCBNK and HBX_DSTBNK.
 ; Enter:
 ;	 HL = Source Address
 ;	 DE = Destination Address
@@ -184,61 +185,48 @@ HBX_BNKSEL1:
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 ;
 HBX_BNKCPY:
-	; Save current bank to restore at end
-	LD	A,(HB_CURBNK)
-	LD	(HBX_CPYBNK),A
-
-	; Setup for copy loop
-	LD	(HB_SRCADR),HL	; Init working source adr
-	LD	(HB_DSTADR),DE	; Init working dest adr 
-	LD	H,B		; Move bytes to copy from BC
-	LD	L,C		; ... to HL to use as byte counter
+	LD	A,(HB_CURBNK)	; GET CURRENT BANK
+	PUSH	AF		; AND SAVE TO RESTORE LATER
+	PUSH	BC		; CUR LEN -> (SP)
 ;
-HBX_BNKCPY2:
-	; Copy loop
-	LD	A,L		; Low byte of count to A
-	AND	$7F		; Isolate bits relevant to 128 byte buf
-	LD	BC,$80		; Assume full buf copy
-	JR	Z,HBX_BNKCPY3	; If full buf copy, go do it
-	LD	C,A		; Otherwise, BC := bytes to copy
+HBX_BC_LOOP:
+	EX	(SP),HL		; HL := CUR LEN, (SP) := CUR SRC
+	LD	BC,HBX_BUFSIZ	; SET BC TO BOUNCE BUFFER SIZE
+	OR	A		; CLEAR CARRY FLAG
+	SBC	HL,BC		; CUR LEN := CUR LEN - BBUF SIZE
+	JR	C,HBX_BC_LAST	; END GAME, LESS THAN BBUF BYTES LEFT
+	EX	(SP),HL		; HL := CUR SRC, (SP) := REM LEN
+	CALL	HBX_BC_ITER	; DO A FULL BBUF SIZE CHUNK
+	JR	HBX_BC_LOOP	; AND REPEAT TILL DONE
 ;
-HBX_BNKCPY3:
-	PUSH	HL		; Save bytes left to copy
-	CALL	HBX_BNKCPY4	; Do it
-	POP	HL		; Recover bytes left to copy
-	XOR	A		; Clear CF
-	SBC	HL,BC		; Reflect bytes copied in HL
-	JR	NZ,HBX_BNKCPY2	; If any left, then loop
-	LD	A,$FF		; Load original bank ($FF is replaced at entry)
-HBX_CPYBNK	.EQU	$ - 1
-
-	JR	HBX_BNKSEL	; Select and return
+HBX_BC_LAST:
+	; HL IS BETWEEN -(BBUF SIZE) AND -1, BC = BBUF SIZE
+	OR	A		; CLEAR CARRY
+	ADC	HL,BC		; HL := REM LEN (0 - 127)
+	EX	(SP),HL		; HL := CUR SRC, (SP) := REM LEN
+	POP	BC		; BC := REM LEN
+	CALL	NZ,HBX_BC_ITER	; DO FINAL CHUNK, BUT ONLY IF NOT ZERO BYTES
+	POP	AF		; RECOVER ORIGINAL BANK
+	JP	HBX_BNKSEL	; SWITCH TO CURRENT BANK AND EXIT
 ;
-HBX_BNKCPY4:	; Switch to source bank
-	LD	A,(HB_SRCBNK)	; Get source bank
-	CALL	HBX_BNKSEL	; Set source bank
-;
-	; Copy BC bytes from HL -> BUF, allow HL to increment
-	PUSH	BC		; Save copy length
-	LD	HL,(HB_SRCADR)	; Point to source adr
-	LD	DE,HBX_BUF	; Setup buffer as interim destination
-	LDIR			; Copy BC bytes: src -> buffer
-	LD	(HB_SRCADR),HL	; Update source adr
-	POP	BC		; Recover copy length
-;	
-	; Switch to dest bank
-	LD	A,(HB_DSTBNK)	; Get destination bank
-	CALL	HBX_BNKSEL	; Set destination bank
-;
-	; Copy BC bytes from BUF -> HL, allow DE to increment
-	PUSH	BC		; Save copy length
-	LD	HL,HBX_BUF	; Use the buffer as source now
-	LD	DE,(HB_DSTADR)	; Setup final destination for copy
-	LDIR			; Copy BC bytes: buffer -> dest
-	LD	(HB_DSTADR),DE	; Update dest adr
-	POP	BC		; Recover copy length
-;
-	RET			; Done
+HBX_BC_ITER:
+	; HL = SRC ADR, DE = DEST ADR, BC = LEN
+	PUSH	BC		; SAVE COPY LEN
+	PUSH	DE		; FINAL DEST ON STACK
+	LD	DE,HBX_BUF	; SET DEST TO BUF
+	LD	A,(HB_SRCBNK)	; GET SOURCE BANK
+	CALL	HBX_BNKSEL	; SWITCH TO SOURCE BANK
+	LDIR			; HL -> BUF (DE), BC BYTES, HL UPDATED SRC ADR
+	POP	DE		; DE := FINAL DEST
+	POP	BC		; GET LEN BACK IN BC
+	PUSH	HL		; SAVE UPDATED SRC ADR
+	LD	HL,HBX_BUF	; SET SRC ADR TO BUF
+	LD	A,(HB_DSTBNK)	; GET DEST BANK
+	CALL	HBX_BNKSEL	; SWITCH TO DEST BANK
+	LDIR			; BUF (HL) -> DE, BC BYTES, DE UPDATED DEST ADR
+	POP	HL		; RECOVER UPDATED SRC ADR
+	; HL = UPD SRC, DE = UPD DEST, BC = 0
+	RET
 ;
 ; Call a routine in another bank saving and restoring the original bank.
 ; Caller MUST ensure stack is already in high memory.
@@ -374,6 +362,27 @@ HBX_INT1:
 	; DONE
 	RETI			; IMPLICITLY REENABLES INTERRUPTS!
 ;
+; PEEK & POKE ROUTINES
+;   ADDRESS IN HL, BANK IN D, VALUE IN/OUT IN E, A IS TRASHED
+;
+HBX_PEEK:
+	LD	A,(HB_CURBNK)
+	PUSH	AF
+	LD	A,D	
+	CALL	HBX_BNKSEL
+	LD	E,(HL)
+	POP	AF
+	JP	HBX_BNKSEL
+;
+HBX_POKE:
+	LD	A,(HB_CURBNK)
+	PUSH	AF
+	LD	A,D	
+	CALL	HBX_BNKSEL
+	LD	(HL),E
+	POP	AF
+	JP	HBX_BNKSEL
+;
 ; FILLER FOR UNUSED HBIOS PROXY CODE SPACE
 ; PAD TO START OF INTERRUPT VECTOR TABLE
 ;
@@ -420,12 +429,13 @@ HBX_STACK	.EQU	$
 	.DB	BID_USR		; BNKCPY SOURCE BANK ID
 	.DW	0		; BNKCPY DESTINATION ADDRESS
 	.DB	BID_USR		; BNKCPY DESTINATION BANK ID
-	.FILL	8,0		; FILLER, RESERVED FOR FUTURE HBIOS USE
+	.DW	0		; BNKCPY LENGTH
+	.FILL	6,0		; FILLER, RESERVED FOR FUTURE HBIOS USE
 	JP	HBX_INVOKE	; FIXED ADR ENTRY FOR HBX_INVOKE (ALT FOR RST 08)
 	JP	HBX_BNKSEL	; FIXED ADR ENTRY FOR HBX_BNKSEL
 	JP	HBX_BNKCPY	; FIXED ADR ENTRY FOR HBX_BNKCPY
 	JP	HBX_BNKCALL	; FIXED ADR ENTRY FOR HBX_BNKCALL
-	.DW	HBX_IDENT	; ADDRESS OF HBIOS PROXY START
+	.DW	HBX_IDENT	; ADDRESS OF HBIOS PROXY START (DEPRECATED)
 	.DW	HBX_IDENT	; ADDRESS OF HBIOS IDENT INFO DATA BLOCK
 ;
 	.FILL	$MEMTOP - $		; FILL TO END OF MEMORY (AS NEEDED)
@@ -617,11 +627,11 @@ HB_INITTBL:
 #IF (CVDUENABLE)
 	.DW	CVDU_INIT
 #ENDIF
-#IF (UPD7220ENABLE)
-	.DW	UPD7220_INIT
+#IF (NECENABLE)
+	.DW	NEC_INIT
 #ENDIF
-#IF (SCGENABLE)
-	.DW	SCG_INIT
+#IF (TMSENABLE)
+	.DW	TMS_INIT
 #ENDIF
 #IF (DSKYENABLE)
 	.DW	DSKY_INIT
@@ -692,7 +702,7 @@ IDLE:
 ;
 HB_DISPATCH:
 ;
-#IF 1	; *DEBUG* START
+#IF 0	; *DEBUG* START
 ;
 	CALL	HB_DISPCALL	; DO THE WORK
 ;
@@ -701,6 +711,8 @@ HB_DISPATCH:
 	LD	A,(HBX_STACK - HBX_STKSIZ + $08)
 	CP	$FF
 	CALL	NZ,PANIC
+	LD	A,$FF
+	LD	(HBX_STACK - HBX_STKSIZ + $08),A
 	POP	AF
 	RET
 HB_DISPCALL:
@@ -803,13 +815,13 @@ CIO_DISPATCH1:
 	CP	CIODEV_CVDU
 	JP	Z,CVDU_DISPCIO
 #ENDIF
-#IF (UPD7220ENABLE)
-	CP	CIODEV_UPD7220
-	JP	Z,UPD7220_DISPCIO
+#IF (NECENABLE)
+	CP	CIODEV_NEC
+	JP	Z,NEC_DISPCIO
 #ENDIF
-#IF (SCGENABLE)
-	CP	CIODEV_SCG
-	JP	Z,SCG_DISPCIO
+#IF (TMSENABLE)
+	CP	CIODEV_TMS
+	JP	Z,TMS_DISPCIO
 #ENDIF
 	CALL	PANIC
 	RET
@@ -879,7 +891,7 @@ CIO_ADDENT:
 ;	RET				; AND RETURN
 
 DIO_DISPATCH:
-;	
+;
 #IF 0	; *DEBUG* START
 ;
 	; DUMP INCOMING CALL
@@ -966,7 +978,6 @@ DIO_DISPATCH1:
 #ENDIF
 	CALL	PANIC
 	RET
-
 ;
 ; CONVERT AN HBIOS STANDARD HARD DISK CHS ADDRESS TO
 ; AN LBA ADDRESS.  A STANDARD HBIOS HARD DISK IS ASSUMED
@@ -1146,13 +1157,13 @@ VDA_DISPATCH1:
 	CP	VDADEV_CVDU
 	JP	Z,CVDU_DISPATCH
 #ENDIF
-#IF (UPD7220ENABLE)
+#IF (NECENABLE)
 	CP	VDADEV_7220
-	JP	Z,UPD7220_DISPATCH
+	JP	Z,NEC_DISPATCH
 #ENDIF
-#IF (SCGENABLE)
-	CP	VDADEV_SCG
-	JP	Z,SCG_DISPATCH
+#IF (TMSENABLE)
+	CP	VDADEV_TMS
+	JP	Z,TMS_DISPATCH
 #ENDIF
 	CALL	PANIC
 ;
@@ -1193,9 +1204,9 @@ SYS_DISPATCH:
 	DEC	A
 	JP	Z,SYS_GETBNK	; $F1
 	DEC	A
-	JP	Z,SYS_COPY	; $F2
+	JP	Z,SYS_SETCPY	; $F2
 	DEC	A
-	JP	Z,SYS_XCOPY	; $F3
+	JP	Z,SYS_BNKCPY	; $F3
 	DEC	A
 	JP	Z,SYS_ALLOC	; $F4
 	DEC	A
@@ -1213,31 +1224,52 @@ SYS_DISPATCH:
 	CALL	PANIC		; INVALID
 ;
 ; SET ACTIVE MEMORY BANK AND RETURN PREVIOUSLY ACTIVE MEMORY BANK
-;   NOTE THAT IT GOES INTO EFFECT AS HBIOS IS EXITED
+;   NOTE THAT IT GOES INTO EFFECT AS HBIOS FUNCTION IS EXITED
 ;   HERE, WE JUST SET THE CURRENT BANK
 ;   CALLER MUST EXTABLISH UPPER MEMORY STACK BEFORE INVOKING THIS FUNCTION!
 ;
 SYS_SETBNK:
-	LD	A,(HBX_INVBNK)	; GET THE PREVIOUS ACTIVE MEMORY BANK
-	PUSH	AF		; SAVE IT
-	LD	A,C		; LOAD THE NEW BANK REQUESTED
-	LD	(HBX_INVBNK),A	; SET IT FOR ACTIVATION UPON HBIOS RETURN
-	POP	AF		; GET PREVIOUS BANK INTO A
-	OR	A
-	RET
+	PUSH	HL		; SAVE INCOMING HL
+	LD	HL,HBX_INVBNK	; POINT TO HBIOS INVOKE BANK ID ADDRESS
+	LD	A,(HL)		; GET EXISTING BANK ID TO A
+	LD	(HL),C		; UPDATE INVOKE BANK TO NEW BANK ID
+	LD	C,A		; PUT PREVIOUS BANK ID IN C FOR RETURN
+	POP	HL		; RESTORE ORIGINAL HL
+	XOR	A		; SIGNAL SUCCESS
+	RET			; DONE
 ;
 ; GET ACTIVE MEMORY BANK
 ;
 SYS_GETBNK:
 	LD	A,(HBX_INVBNK)	; GET THE ACTIVE MEMORY BANK
-	OR	A
+	LD	C,A		; MOVE TO C
+	XOR	A		; SIGNAL SUCCESS
+	RET
+;
+; SET BANKS AND LENGTH FOR INTERBANK MEMORY COPY (BNKCPY)
+; ENTRY: E=SOURCE BANK ID
+;        D=DEST BANK ID
+;        HL=COPY LENGTH (IN BYTES)
+;
+SYS_SETCPY:
+	LD	A,E
+	LD	(HB_SRCBNK),A	; RECORD THE SOURCE BANK
+	LD	A,D
+	LD	(HB_DSTBNK),A	; RECORD THE DESTINATION BANK
+	LD	(HB_CPYLEN),HL	; RECORD THE COPY LENGTH
+	XOR	A
 	RET
 ;
 ; PERFORM MEMORY COPY POTENTIALLY ACROSS BANKS
+; ENTRY: HL=SOURCE ADDRESS
+;        DE=DESTINATION ADDRESS
+; NOTE: SRC/DEST BANK & COPY LENGTH MUST BE SET VIA SETCPY
 ;
-SYS_COPY:
-	PUSH	IX
-	POP	BC
+SYS_BNKCPY:
+	PUSH	HL		; SAVE INCOMING HL
+	LD	HL,(HB_CPYLEN)	; HL := COPY LEN (SAVED IN SETCPY)
+	EX	(SP),HL		; RESTORE HL & SET (SP) TO COPY LEN
+	POP	BC		; BC := COPY LEN
 
 	;; *DEBUG* START
 	;PUSH	AF
@@ -1279,16 +1311,6 @@ SYS_COPY:
 	XOR	A
 	RET
 ;
-; SET BANKS FOR EXTENDED (INTERBANK) MEMORY COPY
-;
-SYS_XCOPY:
-	LD	A,E
-	LD	(HB_SRCBNK),A
-	LD	A,D
-	LD	(HB_DSTBNK),A
-	XOR	A
-	RET
-;
 ; ALLOCATE HL BYTES OF MEMORY FROM HBIOS HEAP
 ; RETURNS POINTER TO ALLOCATED MEMORY IN HL
 ; ON SUCCESS RETURN A == 0, AND Z SET
@@ -1381,7 +1403,7 @@ SYS_GETMEMINFO:
 	XOR	A
 	RET
 ;
-; GET SERIAL UNIT COUNT
+; GET BANK CONFIGURATION INFORMATION
 ;   RETURNS:
 ;     D: HBIOS BANK ID
 ;     E: USER BANK ID
@@ -1440,21 +1462,20 @@ SYS_SETBOOTINFO:
 	XOR	A
 	RET
 ;
-; RETURN A BYTE OF MEMORY FROM HBIOS BANK
-; ENTRY: HL=ADDRESS IN HBIOS BANK (0H-7FFFH)
-; RETURN: C=BYTE VALUE
+; RETURN A BYTE OF MEMORY FROM SPECIFIED BANK
+; ENTRY: D=BANK ID, HL=ADDRESS
+; RETURN: E=BYTE VALUE
 ;
 SYS_PEEK:
-	LD	C,(HL)
+	CALL	HBX_PEEK	; IMPLEMENTED IN PROXY
 	XOR	A
 	RET
 ;
-; WRITE A BYTE OF MEMORY TO HBIOS BANK
-; ENTRY: HL=ADDRESS IN HBIOS BANK (0H-7FFFH)
-; RETURN: C=BYTE VALUE
+; WRITE A BYTE OF MEMORY TO SPECIFIED BANK
+; ENTRY: D=BANK ID, HL=ADDRESS IN HBIOS BANK, E=BYTE VALUE
 ;
 SYS_POKE:
-	LD	(HL),C
+	CALL	HBX_POKE	; IMPLEMENTED IN PROXY
 	XOR	A
 	RET
 ;;
@@ -1684,21 +1705,21 @@ SIZ_CVDU	.EQU	$ - ORG_CVDU
 		.ECHO	" bytes.\n"
 #ENDIF
 ;
-#IF (UPD7220ENABLE)
-ORG_UPD7220	.EQU	$
-  #INCLUDE "upd7220.asm"
-SIZ_UPD7220	.EQU	$ - ORG_UPD7220
-		.ECHO	"UPD7220 occupies "
-		.ECHO	SIZ_UPD7220
+#IF (NECENABLE)
+ORG_NEC	.EQU	$
+  #INCLUDE "nec.asm"
+SIZ_NEC	.EQU	$ - ORG_NEC
+		.ECHO	"NEC occupies "
+		.ECHO	SIZ_NEC
 		.ECHO	" bytes.\n"
 #ENDIF
 ;
-#IF (SCGENABLE)
-ORG_SCG		.EQU	$
-  #INCLUDE "scg.asm"
-SIZ_SCG		.EQU	$ - ORG_SCG
-		.ECHO	"SCG occupies "
-		.ECHO	SIZ_SCG
+#IF (TMSENABLE)
+ORG_TMS		.EQU	$
+  #INCLUDE "tms.asm"
+SIZ_TMS		.EQU	$ - ORG_TMS
+		.ECHO	"TMS occupies "
+		.ECHO	SIZ_TMS
 		.ECHO	" bytes.\n"
 #ENDIF
 ;
@@ -2286,8 +2307,7 @@ PS_SERIAL:
 ; PRINT SERIAL TYPE (SERIAL ATTRIBUTE IN E)
 ;
 PS_PRTST:
-	LD	HL,PS_STDUMMY
-	CALL	PS_PRT			; PRINT $ TERM STRING AT (HL), C:=CHARS PRINTED
+	CALL	PS_PRTNUL		; NUL FOR NOW
 	LD	A,18			; 18 CHAR FIELD
 	SUB	C
 	CALL	PS_PAD			; PAD N SPACES (SPECIFIED IN A)
@@ -2298,6 +2318,10 @@ PS_PRTST:
 PS_PRTSC:
 	LD	B,BF_CIOQUERY		; HBIOS FUNC: GET CIO CONFIG
 	RST	08			; DE:HL := BAUD RATE
+	LD	A,D			; TEST FOR $FF
+	AND	E
+	INC	A			; SET Z IF DE == $FF
+	JP	Z,PS_PRTNUL		; $FF == NO CONFIG DEFINED
 	PUSH	DE			; DE:HL ==> HL:BC
 	PUSH	HL
 	POP	BC
@@ -2341,8 +2365,7 @@ PS_VIDEO:
 ; PRINT VIDEO TYPE (VIDEO ATTRIBUTE IN E)
 ;
 PS_PRTVT:
-	LD	HL,PS_VTDUMMY
-	CALL	PS_PRT			; PRINT $ TERM STRING AT (HL), C:=CHARS PRINTED
+	CALL	PS_PRTNUL		; NUL FOR NOW
 	LD	A,18			; 18 CHAR FIELD
 	SUB	C
 	CALL	PS_PAD			; PAD N SPACES (SPECIFIED IN A)
@@ -2351,8 +2374,16 @@ PS_PRTVT:
 ; PRINT VIDEO CONFIG (UNIT IN C, ATTRIBUTE IN E)
 ;
 PS_PRTVC:
-	LD	HL,PS_VCDUMMY
-	CALL	PS_PRT
+	PRTS("TEXT$")
+	CALL	PC_COMMA
+	LD	B,BF_VDAQRY		; FUNC: QUERY FOR VDA CONFIG
+	RST	08			; D:=ROWS, E:=COLS
+	LD	A,E
+	CALL	PRTDECB
+	LD	A,'x'
+	CALL	COUT
+	LD	A,D
+	CALL	PRTDECB
 	RET
 ;
 ; PRINT DEVICE NMEMONIC, DEVTYP/NUM SPECIFIED IN DE
@@ -2378,6 +2409,12 @@ PS_PRTDEV:
 	CALL	PS_PAD			; PAD N SPACES (SPECIFIED IN A)
 	RET
 ;
+; PRINT DEVICE NMEMONIC, DEVTYP/NUM SPECIFIED IN DE
+;
+PS_PRTNUL:
+	LD	HL,PS_STRNUL
+	; FALL THRU TO PS_PRT
+;
 ;
 ;
 PS_PRT:
@@ -2407,6 +2444,8 @@ PS_PAD1:
 ;
 PS_BCDTMP	.FILL	5,0		; TEMPORARY BCD NUMBER STORAGE
 ;
+PS_STRNUL	.TEXT	"--$"		; DISPLAY STRING FOR NUL VALUE
+;
 ; DISK DEVICE STRINGS
 ;
 PS_DDSTRREF:
@@ -2448,7 +2487,7 @@ PS_FLP3		.TEXT	"3.5\", $"
 PS_FLPN		.TEXT	"???\", $"
 ;
 PS_FLPSS	.TEXT	"SS/$"
-PS_FLPDS	.TEXT	"SS/$"
+PS_FLPDS	.TEXT	"DS/$"
 ;
 PS_FLPSD	.TEXT	"SD$"
 PS_FLPDD	.TEXT	"DD$"
@@ -2459,38 +2498,35 @@ PS_FLPED	.TEXT	"ED$"
 ;
 PS_SDSTRREF:
 	.DW	PS_SDUART, PS_SDASCI, PS_SDVDU, PS_SDCVDU
-	.DW	PS_SDUPD7220, PS_SDSCG, PS_SDPRPCON, PS_SDPPPCON
+	.DW	PS_SDNEC, PS_SDTMS, PS_SDPRPCON, PS_SDPPPCON
 ;
 PS_SDUART		.TEXT	"UART$"
 PS_SDASCI		.TEXT	"ASCI$"
 PS_SDVDU		.TEXT	"VDU$"
 PS_SDCVDU		.TEXT	"CVDU$"
-PS_SDUPD7220		.TEXT	"UPD7220$"
-PS_SDSCG		.TEXT	"SCG$"
+PS_SDNEC		.TEXT	"NEC$"
+PS_SDTMS		.TEXT	"TMS$"
 PS_SDPRPCON		.TEXT	"PRPCON$"
 PS_SDPPPCON		.TEXT	"PPPCON$"
 ;
 ; SERIAL TYPE STRINGS
 ;
-PS_STDUMMY	.TEXT	"--$"
 ;
 ; VIDEO DEVICE STRINGS
 ;
 PS_VDSTRREF:
-	.DW	PS_VDVDU, PS_VDCVDU, PS_VDUPD7220, PS_VDSCG
+	.DW	PS_VDVDU, PS_VDCVDU, PS_VDNEC, PS_VDTMS
 ;
 PS_VDVDU		.TEXT	"VDU$"
 PS_VDCVDU		.TEXT	"CVDU$"
-PS_VDUPD7220		.TEXT	"UPD7220$"
-PS_VDSCG		.TEXT	"SCG$"
+PS_VDNEC		.TEXT	"NEC$"
+PS_VDTMS		.TEXT	"TMS$"
 ;
 ; SERIAL TYPE STRINGS
 ;
-PS_VTDUMMY	.TEXT	"--$"
 ;
 ; VIDEO CONFIG STRINGS
 ;
-PS_VCDUMMY	.TEXT	"--$"
 ;
 ;
 ;			 0         1         2         3         4         5         6         7
@@ -2624,17 +2660,15 @@ HSTLBAHI	.EQU	$		; BLOCK ADDRESS LBA HIGH WORD
 HSTSEC		.DB	0		; SECTOR (0-255)
 HSTHEAD		.DB	0		; HEAD (0-255)
 ;
-DIOBUF		.DW	0		; PTR TO CURRENT DISK XFR BUFFER
-;
 HB_INTSTKSAV	.DW	0		; SAVED STACK POINTER DURING INT PROCESSING
 		.FILL	$40,$FF		; 32 ENTRY STACK FOR INTERRUPT PROCESSING
 HB_INTSTK	.EQU	$		; TOP OF INTERRUPT PROCESSING STACK
 ;
-STR_BANNER	.DB	"SBC HBIOS v", BIOSVER, ", ", TIMESTAMP, "$"
+STR_BANNER	.DB	"RetroBrew HBIOS v", BIOSVER, ", ", TIMESTAMP, "$"
 STR_PLATFORM	.DB	PLATFORM_NAME, "$"
 STR_SWITCH	.DB	"*** Activating CRT Console ***$"
 ;
-HB_TMPBUF	.FILL	512,0		; INTERNAL DISK BUFFER
+HB_WRKBUF	.FILL	512,0		; INTERNAL DISK BUFFER
 ;
 HB_END		.EXPORT	HB_END		; EXPORT ENDING ADDRESS
 ;

Source/HBIOS/hbios.inc

@@ -55,8 +55,8 @@ BF_VDAKRD	.EQU	BF_VDA + 14	; READ KEYBOARD
 BF_SYS		.EQU	$F0
 BF_SYSSETBNK	.EQU	BF_SYS + 0	; SET CURRENT BANK
 BF_SYSGETBNK	.EQU	BF_SYS + 1	; GET CURRENT BANK
-BF_SYSCPY	.EQU	BF_SYS + 2	; COPY TO/FROM RAM/ROM MEMORY BANK
-BF_SYSXCPY	.EQU	BF_SYS + 3	; EXTENDED COPY SETUP
+BF_SYSSETCPY	.EQU	BF_SYS + 2	; COPY TO/FROM RAM/ROM MEMORY BANK
+BF_SYSBNKCPY	.EQU	BF_SYS + 3	; EXTENDED COPY SETUP
 BF_SYSALLOC	.EQU	BF_SYS + 4	; ALLOC HBIOS HEAP MEMORY
 BF_SYSFREE	.EQU	BF_SYS + 5	; FREE HBIOS HEAP MEMORY
 BF_SYSVER	.EQU	BF_SYS + 6	; GET HBIOS VERSION
@@ -81,8 +81,8 @@ CIODEV_UART	.EQU	$00
 CIODEV_ASCI	.EQU	$10
 CIODEV_VDU	.EQU	$20
 CIODEV_CVDU	.EQU	$30
-CIODEV_UPD7220	.EQU	$40
-CIODEV_SCG	.EQU	$50
+CIODEV_NEC	.EQU	$40
+CIODEV_TMS	.EQU	$50
 CIODEV_PRPCON	.EQU	$60
 CIODEV_PPPCON	.EQU	$70
 CIODEV_CONSOLE	.EQU	$D0
@@ -105,10 +105,10 @@ DIODEV_HDSK	.EQU	$90
 ; VDA DEVICE IDS
 ;
 ;VDADEV_NONE	.EQU	$00		; NO VDA DEVICE
-VDADEV_VDU	.EQU	$00		; ECB VDU - 6545 CHIP
-VDADEV_CVDU	.EQU	$10		; ECB COLOR VDU - 8563 CHIP (NOT IMP)
-VDADEV_UPD7220	.EQU	$20		; ECB uP7220 (NOT IMPLEMENTED)
-VDADEV_SCG	.EQU	$30		; N8 ONBOARD VDA SUBSYSTEM
+VDADEV_VDU	.EQU	$00		; ECB VDU - MOTOROLA 6545
+VDADEV_CVDU	.EQU	$10		; ECB COLOR VDU - MOS 8563
+VDADEV_NEC	.EQU	$20		; ECB NEC UPD7220 (NOT IMPLEMENTED)
+VDADEV_TMS	.EQU	$30		; N8 ONBOARD VDA SUBSYSTEM - TMS 9918
 ;
 ; EMULATION TYPES
 ;
@@ -147,12 +147,6 @@ HCB_BIDRAMD0	.EQU	$DC		; FIRST BANK OF RAM DRIVE
 HCB_BIDRAMDN	.EQU	$DD		; LAST BANK OF RAM DRIVE
 HCB_BIDROMD0	.EQU	$DE		; FIRST BANK OF ROM DRIVE
 HCB_BIDROMDN	.EQU	$DF		; LAST BANK OF ROM DRIVE
-
-;; DEVICE LISTS (POINTS TO START OF LIST, PREFIXED BY ENTRY COUNT)
-;HCB_CDL	.EQU	$E0 + 1		; CHARACTER DEVICES (MAX 7)
-;HCB_PDL	.EQU	$E8 + 1		; PRINT DEVICE LIST (MAX 3)
-;HCB_VDL	.EQU	$EC + 1		; VIDEO DEVICE LIST (MAX 3)
-;HCB_DDL	.EQU	$F0 + 1		; DISK DEVICE LIST (MAX 15)
 ;
 ; HBIOS PROXY COMMON DATA BLOCK
 ; EXACTLY 32 BYTES AT $FFE0-$FFFF
@@ -166,7 +160,7 @@ HB_SRCADR	.EQU	HBX_XFCDAT + 2		; BNKCPY: DESTINATION BANK ID
 HB_SRCBNK	.EQU	HBX_XFCDAT + 4		; BNKCPY: SOURCE BANK ID
 HB_DSTADR	.EQU	HBX_XFCDAT + 5		; BNKCPY: DESTINATION ADDRESS
 HB_DSTBNK	.EQU	HBX_XFCDAT + 7		; BNKCPY: SOURCE ADDRESS
-HB_CNT		.EQU	HBX_XFCDAT + 8		; BNKCPY: COUNT
+HB_CPYLEN	.EQU	HBX_XFCDAT + 8		; BNKCPY: COPY LENGTH
 ;
 HBX_XFCFNS	.EQU	HBX_XFC + $10		; JUMP TABLE PORTION OF HBIOS PROXY INTERFACE AREA
 HB_INVOKE	.EQU	HBX_XFCFNS + (0 * 3)	; INVOKE HBIOS FUNCTION

Source/HBIOS/ide.asm

@@ -293,7 +293,7 @@ IDE_INIT2:
 ;
 	; PRINT LBA/NOLBA
 	CALL	PC_SPACE		; FORMATTING
-	LD	HL,HB_TMPBUF		; POINT TO BUFFER START
+	LD	HL,HB_WRKBUF		; POINT TO BUFFER START
 	LD	DE,98+1			; OFFSET OF BYTE CONTAINING LBA FLAG
 	ADD	HL,DE			; POINT TO FINAL BUFFER ADDRESS
 	LD	A,(HL)			; GET THE BYTE
@@ -512,7 +512,7 @@ IDE_IDENTIFY:
 	LD	(IDE_CMD),A
 	CALL	IDE_RUNCMD
 	RET	NZ
-	LD	HL,HB_TMPBUF
+	LD	HL,HB_WRKBUF
 	JP	IDE_GETBUF		; EXIT THRU BUFRD
 ;
 ;
@@ -911,11 +911,11 @@ IDE_INITDEV:
 	CALL	IDE_IDENTIFY		; EXECUTE IDENTIFY COMMAND
 	RET	NZ			; BAIL OUT ON ERROR
 ;
-	LD	DE,HB_TMPBUF		; POINT TO BUFFER
+	LD	DE,HB_WRKBUF		; POINT TO BUFFER
 	DCALL	DUMP_BUFFER		; DUMP IT IF DEBUGGING
 ;
 	; DETERMINE IF CF DEVICE
-	LD	HL,HB_TMPBUF		; FIRST WORD OF IDENTIFY DATA HAS CF FLAG
+	LD	HL,HB_WRKBUF		; FIRST WORD OF IDENTIFY DATA HAS CF FLAG
 	LD	A,$8A			; FIRST BYTE OF MARKER IS $8A
 	CP	(HL)			; COMPARE
 	JR	NZ,IDE_INITDEV1		; IF NO MATCH, NOT CF
@@ -931,7 +931,7 @@ IDE_INITDEV1:
 	; GET DEVICE CAPACITY AND SAVE IT
 	IDE_DPTR(IDE_CAPACITY)		; POINT HL TO UNIT CAPACITY FIELD
 	PUSH	HL			; SAVE POINTER
-	LD	HL,HB_TMPBUF		; POINT TO BUFFER START
+	LD	HL,HB_WRKBUF		; POINT TO BUFFER START
 	LD	A,120			; OFFSET OF SECTOR COUNT
 	CALL	ADDHLA			; POINT TO ADDRESS OF SECTOR COUNT
 	CALL	LD32			; LOAD IT TO DE:HL

Source/HBIOS/ppide.asm

@@ -289,7 +289,7 @@ PPIDE_INIT2:
 ;
 	; PRINT LBA/NOLBA
 	CALL	PC_SPACE		; FORMATTING
-	LD	HL,HB_TMPBUF		; POINT TO BUFFER START
+	LD	HL,HB_WRKBUF		; POINT TO BUFFER START
 	LD	DE,98+1			; OFFSET OF BYTE CONTAINING LBA FLAG
 	ADD	HL,DE			; POINT TO FINAL BUFFER ADDRESS
 	LD	A,(HL)			; GET THE BYTE
@@ -536,7 +536,7 @@ PPIDE_IDENTIFY:
 	LD	(PPIDE_CMD),A
 	CALL	PPIDE_RUNCMD
 	RET	NZ
-	LD	HL,HB_TMPBUF
+	LD	HL,HB_WRKBUF
 	JP	PPIDE_GETBUF		; EXIT THRU BUFRD
 ;
 ;
@@ -991,11 +991,11 @@ PPIDE_INITDEV:
 	CALL	PPIDE_IDENTIFY		; EXECUTE PPIDENTIFY COMMAND
 	RET	NZ			; BAIL OUT ON ERROR
 ;
-	LD	DE,HB_TMPBUF		; POINT TO BUFFER
+	LD	DE,HB_WRKBUF		; POINT TO BUFFER
 	DCALL	DUMP_BUFFER		; DUMP IT IF DEBUGGING
 ;
 	; DETERMINE IF CF DEVICE
-	LD	HL,HB_TMPBUF		; FIRST WORD OF IDENTIFY DATA HAS CF FLAG
+	LD	HL,HB_WRKBUF		; FIRST WORD OF IDENTIFY DATA HAS CF FLAG
 	LD	A,$8A			; FIRST BYTE OF MARKER IS $8A
 	CP	(HL)			; COMPARE
 	JR	NZ,PPIDE_INITDEV1	; IF NO MATCH, NOT CF
@@ -1011,7 +1011,7 @@ PPIDE_INITDEV1:
 	; GET DEVICE CAPACITY AND SAVE IT
 	PPIDE_DPTR(PPIDE_CAPACITY)		; POINT HL TO UNIT CAPACITY FIELD
 	PUSH	HL			; SAVE POINTER
-	LD	HL,HB_TMPBUF		; POINT TO BUFFER START
+	LD	HL,HB_WRKBUF		; POINT TO BUFFER START
 	LD	A,120			; OFFSET OF SECTOR COUNT
 	CALL	ADDHLA			; POINT TO ADDRESS OF SECTOR COUNT
 	CALL	LD32			; LOAD IT TO DE:HL

Source/HBIOS/tms.asm

@@ -11,89 +11,89 @@
 ;   - IMPLEMENT DYNAMIC READ/WRITE OF CHARACTER BITMAP DATA?
 ;
 ;======================================================================
-; SCG DRIVER - CONSTANTS
+; TMS DRIVER - CONSTANTS
 ;======================================================================
 ;
-SCG_CMDREG	.EQU	N8_BASE + $19	; READ STATUS / WRITE REG SEL
-SCG_DATREG	.EQU	N8_BASE + $18	; READ/WRITE DATA
+TMS_CMDREG	.EQU	N8_BASE + $19	; READ STATUS / WRITE REG SEL
+TMS_DATREG	.EQU	N8_BASE + $18	; READ/WRITE DATA
 ;
-SCG_ROWS	.EQU	24
-SCG_COLS	.EQU	40
+TMS_ROWS	.EQU	24
+TMS_COLS	.EQU	40
 ;
 ; BELOW WAS TUNED FOR N8 AT 18MHZ WITH 3 IO WAIT STATES
 ; WILL NEED TO BE MODIFIED FOR DIFFERENT ACCESS SPEEDS
 ; IF YOU SEE SCREEN CORRUPTION, ADJUST THIS!!!
 ;
-#DEFINE		SCG_IODELAY	NOP \ NOP \ NOP \ NOP \ NOP \ NOP
+#DEFINE		TMS_IODELAY	NOP \ NOP \ NOP \ NOP \ NOP \ NOP
 ;
 ;======================================================================
-; SCG DRIVER - INITIALIZATION
+; TMS DRIVER - INITIALIZATION
 ;======================================================================
 ;
-SCG_INIT:
-	PRTS("SCG: IO=0x$")
-	LD	A,SCG_DATREG
+TMS_INIT:
+	PRTS("TMS: IO=0x$")
+	LD	A,TMS_DATREG
 	CALL	PRTHEXBYTE
 ;
-	CALL 	SCG_CRTINIT		; SETUP THE SCG CHIP REGISTERS
-	CALL	SCG_LOADFONT		; LOAD FONT DATA FROM ROM TO SCG STRORAGE
+	CALL 	TMS_CRTINIT		; SETUP THE TMS CHIP REGISTERS
+	CALL	TMS_LOADFONT		; LOAD FONT DATA FROM ROM TO TMS STRORAGE
 ;
 	; ADD OURSELVES TO VDA DISPATCH TABLE
 	LD	B,0			; PHYSICAL UNIT IS ZERO
-	LD	C,VDADEV_SCG		; DEVICE TYPE
+	LD	C,VDADEV_TMS		; DEVICE TYPE
 	LD	DE,0			; UNIT DATA BLOB ADDRESS
 	CALL	VDA_ADDENT		; ADD ENTRY, A := UNIT ASSIGNED
 ;
 	; ADD OURSELVES TO CIO DISPATCH TABLE
 	LD	B,0			; PHYSICAL UNIT IS ZERO
-	LD	C,CIODEV_SCG		; DEVICE TYPE
+	LD	C,CIODEV_TMS		; DEVICE TYPE
 	LD	DE,0			; UNIT DATA BLOB ADDRESS
 	CALL	CIO_ADDENT		; ADD ENTRY, A := UNIT ASSIGNED
 	LD	(HCB + HCB_CRTDEV),A	; SET OURSELVES AS THE CRT DEVICE
 	
 	LD	D,VDAEMU		; DEFAULT EMULATION
 	LD	E,0			; VIDEO MODE = 0
-	JP	SCG_VDAINI
+	JP	TMS_VDAINI
 ;	
 ;======================================================================
-; SCG DRIVER - CHARACTER I/O (CIO) DISPATCHER AND FUNCTIONS
+; TMS DRIVER - CHARACTER I/O (CIO) DISPATCHER AND FUNCTIONS
 ;======================================================================
 ;
-SCG_DISPCIO:
+TMS_DISPCIO:
 	JP	PANIC
-SCG_CIODISPADR	.EQU	$ - 2
+TMS_CIODISPADR	.EQU	$ - 2
 ;	
 ;======================================================================
-; SCG DRIVER - VIDEO DISPLAY ADAPTER (VDA) DISPATCHER AND FUNCTIONS
+; TMS DRIVER - VIDEO DISPLAY ADAPTER (VDA) DISPATCHER AND FUNCTIONS
 ;======================================================================
 ;
-SCG_DISPATCH:
+TMS_DISPATCH:
 	LD	A,B		; GET REQUESTED FUNCTION
 	AND	$0F		; ISOLATE SUB-FUNCTION
 
-	JP	Z,SCG_VDAINI	; $40
+	JP	Z,TMS_VDAINI	; $40
 	DEC	A
-	JP	Z,SCG_VDAQRY	; $41
+	JP	Z,TMS_VDAQRY	; $41
 	DEC	A
-	JP	Z,SCG_VDARES	; $42
+	JP	Z,TMS_VDARES	; $42
 	DEC	A
-	JP	Z,SCG_VDADEV	; $43
+	JP	Z,TMS_VDADEV	; $43
 	DEC	A
-	JP	Z,SCG_VDASCS	; $44
+	JP	Z,TMS_VDASCS	; $44
 	DEC	A
-	JP	Z,SCG_VDASCP	; $45
+	JP	Z,TMS_VDASCP	; $45
 	DEC	A
-	JP	Z,SCG_VDASAT	; $46
+	JP	Z,TMS_VDASAT	; $46
 	DEC	A
-	JP	Z,SCG_VDASCO	; $47
+	JP	Z,TMS_VDASCO	; $47
 	DEC	A
-	JP	Z,SCG_VDAWRC	; $48
+	JP	Z,TMS_VDAWRC	; $48
 	DEC	A
-	JP	Z,SCG_VDAFIL	; $49
+	JP	Z,TMS_VDAFIL	; $49
 	DEC	A
-	JP	Z,SCG_VDACPY	; $4A
+	JP	Z,TMS_VDACPY	; $4A
 	DEC	A
-	JP	Z,SCG_VDASCR	; $4B
+	JP	Z,TMS_VDASCR	; $4B
 	DEC	A
 	JP	Z,PPK_STAT	; $4C
 	DEC	A
@@ -102,307 +102,307 @@ SCG_DISPATCH:
 	JP	Z,PPK_READ	; $4E
 	CALL	PANIC
 
-SCG_VDAINI:
+TMS_VDAINI:
 	; RESET VDA
 	PUSH	DE			; SAVE EMULATION TYPE (IN D)
-	CALL	SCG_VDARES		; RESET VDA
+	CALL	TMS_VDARES		; RESET VDA
 	POP	DE			; RECOVER EMULATION TYPE
 
 	; INITIALIZE EMULATION
 	LD	B,D			; EMULATION TYPE TO B
-	LD	C,CIODEV_SCG		; PASS OUR DEVICE TYPE IN C
-	LD	DE,SCG_DISPATCH		; DISPATCH ADDRESS TO DE
+	LD	C,CIODEV_TMS		; PASS OUR DEVICE TYPE IN C
+	LD	DE,TMS_DISPATCH		; DISPATCH ADDRESS TO DE
 	CALL	EMU_INIT		; INITIALIZE EMULATION, DE := CIO DISPATCHER
-	LD	(SCG_CIODISPADR),DE	; SAVE EMULATORS CIO DISPATCH INTERFACE ADDRESS
+	LD	(TMS_CIODISPADR),DE	; SAVE EMULATORS CIO DISPATCH INTERFACE ADDRESS
 
 	XOR	A			; SIGNAL SUCCESS
 	RET
 
 
-SCG_VDAQRY:
+TMS_VDAQRY:
 	LD	C,$00		; MODE ZERO IS ALL WE KNOW
-	LD	D,SCG_ROWS	; ROWS
-	LD	E,SCG_COLS	; COLS
+	LD	D,TMS_ROWS	; ROWS
+	LD	E,TMS_COLS	; COLS
 	LD	HL,0		; EXTRACTION OF CURRENT BITMAP DATA NOT SUPPORTED YET
 	XOR	A		; SIGNAL SUCCESS
 	RET
 
-SCG_VDADEV:
-	LD	D,VDADEV_SCG	; D := DEVICE TYPE
+TMS_VDADEV:
+	LD	D,VDADEV_TMS	; D := DEVICE TYPE
 	LD	E,C		; E := PHYSICAL UNIT
 	XOR	A		; SIGNAL SUCCESS
 	RET
 	
-SCG_VDARES:
+TMS_VDARES:
 	LD	DE,0			; ROW = 0, COL = 0
-	CALL	SCG_XY			; SEND CURSOR TO TOP LEFT
+	CALL	TMS_XY			; SEND CURSOR TO TOP LEFT
 	LD	A,' '			; BLANK THE SCREEN
-	LD	DE,SCG_ROWS * SCG_COLS	; FILL ENTIRE BUFFER
-	CALL	SCG_FILL		; DO IT
+	LD	DE,TMS_ROWS * TMS_COLS	; FILL ENTIRE BUFFER
+	CALL	TMS_FILL		; DO IT
 	LD	DE,0			; ROW = 0, COL = 0
-	CALL	SCG_XY			; SEND CURSOR TO TOP LEFT
+	CALL	TMS_XY			; SEND CURSOR TO TOP LEFT
 	XOR	A
 	DEC	A
-	LD	(SCG_CURSAV),A
-	CALL	SCG_SETCUR		; SET CURSOR
+	LD	(TMS_CURSAV),A
+	CALL	TMS_SETCUR		; SET CURSOR
 	
 	XOR	A			; SIGNAL SUCCESS
 	RET
 	
-SCG_VDASCS:
+TMS_VDASCS:
 	CALL	PANIC		; NOT IMPLEMENTED (YET)
 	
-SCG_VDASCP:
-	CALL	SCG_CLRCUR
-	CALL	SCG_XY		; SET CURSOR POSITION
-	CALL	SCG_SETCUR
+TMS_VDASCP:
+	CALL	TMS_CLRCUR
+	CALL	TMS_XY		; SET CURSOR POSITION
+	CALL	TMS_SETCUR
 	XOR	A		; SIGNAL SUCCESS
 	RET
 	
-SCG_VDASAT:
+TMS_VDASAT:
 	XOR	A		; NOT POSSIBLE, JUST SIGNAL SUCCESS
 	RET
 	
-SCG_VDASCO:
+TMS_VDASCO:
 	XOR	A		; NOT POSSIBLE, JUST SIGNAL SUCCESS
 	RET
 	
-SCG_VDAWRC:
-	CALL	SCG_CLRCUR	; CURSOR OFF
+TMS_VDAWRC:
+	CALL	TMS_CLRCUR	; CURSOR OFF
 	LD	A,E		; CHARACTER TO WRITE GOES IN A
-	CALL	SCG_PUTCHAR	; PUT IT ON THE SCREEN
-	CALL	SCG_SETCUR
+	CALL	TMS_PUTCHAR	; PUT IT ON THE SCREEN
+	CALL	TMS_SETCUR
 	XOR	A		; SIGNAL SUCCESS
 	RET
 	
-SCG_VDAFIL:
-	CALL	SCG_CLRCUR
+TMS_VDAFIL:
+	CALL	TMS_CLRCUR
 	LD	A,E		; FILL CHARACTER GOES IN A
 	EX	DE,HL		; FILL LENGTH GOES IN DE
-	CALL	SCG_FILL	; DO THE FILL
-	CALL	SCG_SETCUR
+	CALL	TMS_FILL	; DO THE FILL
+	CALL	TMS_SETCUR
 	XOR	A		; SIGNAL SUCCESS
 	RET
 
-SCG_VDACPY:
-	CALL	SCG_CLRCUR
-	; LENGTH IN HL, SOURCE ROW/COL IN DE, DEST IS SCG_POS
+TMS_VDACPY:
+	CALL	TMS_CLRCUR
+	; LENGTH IN HL, SOURCE ROW/COL IN DE, DEST IS TMS_POS
 	; BLKCPY USES: HL=SOURCE, DE=DEST, BC=COUNT
 	PUSH	HL		; SAVE LENGTH
-	CALL	SCG_XY2IDX	; ROW/COL IN DE -> SOURCE ADR IN HL
+	CALL	TMS_XY2IDX	; ROW/COL IN DE -> SOURCE ADR IN HL
 	POP	BC		; RECOVER LENGTH IN BC
-	LD	DE,(SCG_POS)	; PUT DEST IN DE
-	CALL	SCG_BLKCPY	; DO A BLOCK COPY
-	CALL	SCG_SETCUR
+	LD	DE,(TMS_POS)	; PUT DEST IN DE
+	CALL	TMS_BLKCPY	; DO A BLOCK COPY
+	CALL	TMS_SETCUR
 	XOR	A
 	RET
 	
-SCG_VDASCR:
-	CALL	SCG_CLRCUR
-SCG_VDASCR0:
+TMS_VDASCR:
+	CALL	TMS_CLRCUR
+TMS_VDASCR0:
 	LD	A,E		; LOAD E INTO A
 	OR	A		; SET FLAGS
-	JR	Z,SCG_VDASCR2	; IF ZERO, WE ARE DONE
+	JR	Z,TMS_VDASCR2	; IF ZERO, WE ARE DONE
 	PUSH	DE		; SAVE E
-	JP	M,SCG_VDASCR1	; E IS NEGATIVE, REVERSE SCROLL
-	CALL	SCG_SCROLL	; SCROLL FORWARD ONE LINE
+	JP	M,TMS_VDASCR1	; E IS NEGATIVE, REVERSE SCROLL
+	CALL	TMS_SCROLL	; SCROLL FORWARD ONE LINE
 	POP	DE		; RECOVER E
 	DEC	E		; DECREMENT IT
-	JR	SCG_VDASCR0	; LOOP
-SCG_VDASCR1:
-	CALL	SCG_RSCROLL	; SCROLL REVERSE ONE LINE
+	JR	TMS_VDASCR0	; LOOP
+TMS_VDASCR1:
+	CALL	TMS_RSCROLL	; SCROLL REVERSE ONE LINE
 	POP	DE		; RECOVER E
 	INC	E		; INCREMENT IT
-	JR	SCG_VDASCR0	; LOOP
-SCG_VDASCR2:
-	CALL	SCG_SETCUR
+	JR	TMS_VDASCR0	; LOOP
+TMS_VDASCR2:
+	CALL	TMS_SETCUR
 	XOR	A
 	RET
 ;
 ;======================================================================
-; SCG DRIVER - PRIVATE DRIVER FUNCTIONS
+; TMS DRIVER - PRIVATE DRIVER FUNCTIONS
 ;======================================================================
 ;
 ;----------------------------------------------------------------------
 ; SET TMS9918 REGISTER VALUE
-;   SCG_SET WRITES VALUE IN A TO VDU REGISTER SPECIFIED IN C
+;   TMS_SET WRITES VALUE IN A TO VDU REGISTER SPECIFIED IN C
 ;----------------------------------------------------------------------
 ;
-SCG_SET:
-	OUT	(SCG_CMDREG),A		; WRITE IT
-	SCG_IODELAY
+TMS_SET:
+	OUT	(TMS_CMDREG),A		; WRITE IT
+	TMS_IODELAY
 	LD	A,C			; GET THE DESIRED REGISTER
 	OR	$80			; SET BIT 7 
-	OUT	(SCG_CMDREG),A		; SELECT THE DESIRED REGISTER
-	SCG_IODELAY
+	OUT	(TMS_CMDREG),A		; SELECT THE DESIRED REGISTER
+	TMS_IODELAY
 	RET
 ;
 ;----------------------------------------------------------------------
 ; SET TMS9918 READ/WRITE ADDRESS
-;   SCG_WR SETS TMS9918 TO BEGIN WRITING TO ADDRESS SPECIFIED IN HL
-;   SCG_RD SETS TMS9918 TO BEGIN READING TO ADDRESS SPECIFIED IN HL
+;   TMS_WR SETS TMS9918 TO BEGIN WRITING TO ADDRESS SPECIFIED IN HL
+;   TMS_RD SETS TMS9918 TO BEGIN READING TO ADDRESS SPECIFIED IN HL
 ;----------------------------------------------------------------------
 ;
-SCG_WR:
+TMS_WR:
 	PUSH	HL
 	SET	6,H			; SET WRITE BIT
-	CALL	SCG_RD
+	CALL	TMS_RD
 	POP	HL
 	RET
 ;
-SCG_RD:
+TMS_RD:
 	LD	A,L
-	OUT	(SCG_CMDREG),A
-	SCG_IODELAY
+	OUT	(TMS_CMDREG),A
+	TMS_IODELAY
 	LD	A,H
-	OUT	(SCG_CMDREG),A
-	SCG_IODELAY
+	OUT	(TMS_CMDREG),A
+	TMS_IODELAY
 	RET
 ;
 ;----------------------------------------------------------------------
 ; MOS 8563 DISPLAY CONTROLLER CHIP INITIALIZATION
 ;----------------------------------------------------------------------
 ;
-SCG_CRTINIT:
+TMS_CRTINIT:
 	; SET WRITE ADDRESS TO $0
 	LD	HL,0
-	CALL	SCG_WR
+	CALL	TMS_WR
 ;
 	; FILL ENTIRE RAM CONTENTS
 	LD	DE,$4000
-SCG_CRTINIT1:
+TMS_CRTINIT1:
 	XOR	A
-	OUT	(SCG_DATREG),A
+	OUT	(TMS_DATREG),A
 	DEC	DE
 	LD	A,D
 	OR	E
-	JR	NZ,SCG_CRTINIT1
+	JR	NZ,TMS_CRTINIT1
 ;
 	; INITIALIZE VDU REGISTERS
     	LD 	C,0			; START WITH REGISTER 0
-	LD	B,SCG_INIT9918LEN	; NUMBER OF REGISTERS TO INIT
-    	LD 	HL,SCG_INIT9918		; HL = POINTER TO THE DEFAULT VALUES
-SCG_CRTINIT2:
+	LD	B,TMS_INIT9918LEN	; NUMBER OF REGISTERS TO INIT
+    	LD 	HL,TMS_INIT9918		; HL = POINTER TO THE DEFAULT VALUES
+TMS_CRTINIT2:
 	LD	A,(HL)			; GET VALUE
-	CALL	SCG_SET			; WRITE IT
+	CALL	TMS_SET			; WRITE IT
 	INC	HL			; POINT TO NEXT VALUE
 	INC	C			; POINT TO NEXT REGISTER
-	DJNZ	SCG_CRTINIT2		; LOOP
+	DJNZ	TMS_CRTINIT2		; LOOP
     	RET
 ;
 ;----------------------------------------------------------------------
 ; LOAD FONT DATA
 ;----------------------------------------------------------------------
 ;
-SCG_LOADFONT:
+TMS_LOADFONT:
 	; SET WRITE ADDRESS TO $800
 	LD	HL,$800
-	CALL	SCG_WR
+	CALL	TMS_WR
 ;
 	; FILL $800 BYTES FROM FONTDATA
-	LD	HL,SCG_FONTDATA
+	LD	HL,TMS_FONTDATA
 	LD	DE,$100 * 8
-SCG_LOADFONT1:
+TMS_LOADFONT1:
 	LD	B,8
-SCG_LOADFONT2:
+TMS_LOADFONT2:
 	LD	A,(HL)
 	PUSH	AF
 	INC	HL
-	DJNZ	SCG_LOADFONT2
+	DJNZ	TMS_LOADFONT2
 ;
 	LD	B,8
-SCG_LOADFONT3:
+TMS_LOADFONT3:
 	POP	AF
-	OUT	(SCG_DATREG),A
+	OUT	(TMS_DATREG),A
 	DEC	DE
-	DJNZ	SCG_LOADFONT3
+	DJNZ	TMS_LOADFONT3
 ;
 	LD	A,D
 	OR	E
-	JR	NZ,SCG_LOADFONT1
+	JR	NZ,TMS_LOADFONT1
 ;
 	RET
 ;
 ;----------------------------------------------------------------------
 ; VIRTUAL CURSOR MANAGEMENT
-;   SCG_SETCUR CONFIGURES AND DISPLAYS CURSOR AT CURRENT CURSOR LOCATION
-;   SCG_CLRCUR REMOVES THE CURSOR
+;   TMS_SETCUR CONFIGURES AND DISPLAYS CURSOR AT CURRENT CURSOR LOCATION
+;   TMS_CLRCUR REMOVES THE CURSOR
 ;
 ; VIRTUAL CURSOR IS GENERATED BY DYNAMICALLY CHANGING FONT GLYPH
 ; FOR CHAR 255 TO BE THE INVERSE OF THE GLYPH OF THE CHARACTER UNDER
 ; THE CURRENT CURSOR POSITION.  THE CHARACTER CODE IS THEN SWITCH TO
 ; THE VALUE 255 AND THE ORIGINAL VALUE IS SAVED.  WHEN THE DISPLAY
 ; NEEDS TO BE CHANGED THE PROCESS IS UNDONE.  IT IS ESSENTIAL THAT
-; ALL DISPLAY CHANGES BE BRACKETED WITH CALLS TO SCG_CLRCUR PRIOR TO
-; CHANGES AND SCG_SETCUR AFTER CHANGES.
+; ALL DISPLAY CHANGES BE BRACKETED WITH CALLS TO TMS_CLRCUR PRIOR TO
+; CHANGES AND TMS_SETCUR AFTER CHANGES.
 ;----------------------------------------------------------------------
 ;
-SCG_SETCUR:
+TMS_SETCUR:
 	PUSH	HL			; PRESERVE HL
 	PUSH	DE			; PRESERVE DE
-	LD	HL,(SCG_POS)		; GET CURSOR POSITION
-	CALL	SCG_RD			; SETUP TO READ VDU BUF
-	IN	A,(SCG_DATREG)		; GET REAL CHAR UNDER CURSOR
-	SCG_IODELAY			; DELAY
+	LD	HL,(TMS_POS)		; GET CURSOR POSITION
+	CALL	TMS_RD			; SETUP TO READ VDU BUF
+	IN	A,(TMS_DATREG)		; GET REAL CHAR UNDER CURSOR
+	TMS_IODELAY			; DELAY
 	PUSH	AF			; SAVE THE CHARACTER
-	CALL	SCG_WR			; SETUP TO WRITE TO THE SAME PLACE
+	CALL	TMS_WR			; SETUP TO WRITE TO THE SAME PLACE
 	LD	A,$FF			; REPLACE REAL CHAR WITH 255
-	OUT	(SCG_DATREG),A		; DO IT
-	SCG_IODELAY			; DELAY
+	OUT	(TMS_DATREG),A		; DO IT
+	TMS_IODELAY			; DELAY
 	POP	AF			; RECOVER THE REAL CHARACTER
 	LD	B,A			; PUT IT IN B
-	LD	A,(SCG_CURSAV)		; GET THE CURRENTLY SAVED CHAR
+	LD	A,(TMS_CURSAV)		; GET THE CURRENTLY SAVED CHAR
 	CP	B			; COMPARE TO CURRENT
-	JR	Z,SCG_SETCUR3		; IF EQUAL, BYPASS EXTRA WORK
+	JR	Z,TMS_SETCUR3		; IF EQUAL, BYPASS EXTRA WORK
 	LD	A,B			; GET REAL CHAR BACK TO A
-	LD	(SCG_CURSAV),A		; SAVE IT
+	LD	(TMS_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
-SCG_SETCUR0:	; MULT BY 8 FOR FONT INDEX
+TMS_SETCUR0:	; MULT BY 8 FOR FONT INDEX
 	SLA	L			; SHIFT LSB INTO CARRY
 	RL	H			; SHFT MSB FROM CARRY
-	DJNZ	SCG_SETCUR0		; LOOP 3 TIMES
+	DJNZ	TMS_SETCUR0		; LOOP 3 TIMES
 	LD	DE,$800			; OFFSET TO START OF FONT TABLE
 	ADD	HL,DE			; ADD TO FONT INDEX
-	CALL	SCG_RD			; SETUP TO READ GLYPH
+	CALL	TMS_RD			; SETUP TO READ GLYPH
 	LD	B,8			; 8 BYTES
-	LD	HL,SCG_BUF		; INTO BUFFER
-SCG_SETCUR1:	; READ GLYPH LOOP
-	IN	A,(SCG_DATREG)		; GET NEXT BYTE
-	SCG_IODELAY			; IO DELAY
+	LD	HL,TMS_BUF		; INTO BUFFER
+TMS_SETCUR1:	; READ GLYPH LOOP
+	IN	A,(TMS_DATREG)		; GET NEXT BYTE
+	TMS_IODELAY			; IO DELAY
 	LD	(HL),A			; SAVE VALUE IN BUF
 	INC	HL			; BUMP BUF POINTER
-	DJNZ	SCG_SETCUR1		; LOOP FOR 8 BYTES
+	DJNZ	TMS_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	SCG_WR			; SETUP TO WRITE THE INVERTED GLYPH
+	CALL	TMS_WR			; SETUP TO WRITE THE INVERTED GLYPH
 	LD	B,8			; 8 BYTES PER GLYPH
-	LD	HL,SCG_BUF		; POINT TO BUFFER
-SCG_SETCUR2:	; WRITE INVERTED GLYPH LOOP
+	LD	HL,TMS_BUF		; POINT TO BUFFER
+TMS_SETCUR2:	; WRITE INVERTED GLYPH LOOP
 	LD	A,(HL)			; GET THE BYTE
 	INC	HL			; BUMP THE BUF POINTER
 	XOR	$FF			; INVERT THE VALUE
-	OUT	(SCG_DATREG),A		; WRITE IT TO VDU
-	SCG_IODELAY			; IO DELAY
-	DJNZ	SCG_SETCUR2		; LOOP FOR ALL 8 BYTES OF GLYPH
+	OUT	(TMS_DATREG),A		; WRITE IT TO VDU
+	TMS_IODELAY			; IO DELAY
+	DJNZ	TMS_SETCUR2		; LOOP FOR ALL 8 BYTES OF GLYPH
 ;
-SCG_SETCUR3:	; RESTORE REGISTERS AND RETURN
+TMS_SETCUR3:	; RESTORE REGISTERS AND RETURN
 	POP	DE			; RECOVER DE
 	POP	HL			; RECOVER HL
 	RET				; RETURN
 ;
 ;
 ;
-SCG_CLRCUR:	; REMOVE VIRTUAL CURSOR FROM SCREEN
+TMS_CLRCUR:	; REMOVE VIRTUAL CURSOR FROM SCREEN
 	PUSH	HL			; SAVE HL
-	LD	HL,(SCG_POS)		; POINT TO CURRENT CURSOR POS
-	CALL	SCG_WR			; SET UP TO WRITE TO VDU
-	LD	A,(SCG_CURSAV)		; GET THE REAL CHARACTER
-	OUT	(SCG_DATREG),A		; WRITE IT
-	SCG_IODELAY			; IO DELAY
+	LD	HL,(TMS_POS)		; POINT TO CURRENT CURSOR POS
+	CALL	TMS_WR			; SET UP TO WRITE TO VDU
+	LD	A,(TMS_CURSAV)		; GET THE REAL CHARACTER
+	OUT	(TMS_DATREG),A		; WRITE IT
+	TMS_IODELAY			; IO DELAY
 	POP	HL			; RECOVER HL
 	RET				; RETURN
 ;
@@ -410,9 +410,9 @@ SCG_CLRCUR:	; REMOVE VIRTUAL CURSOR FROM SCREEN
 ; SET CURSOR POSITION TO ROW IN D AND COLUMN IN E
 ;----------------------------------------------------------------------
 ;
-SCG_XY:
-	CALL	SCG_XY2IDX		; CONVERT ROW/COL TO BUF IDX
-	LD	(SCG_POS),HL		; SAVE THE RESULT (DISPLAY POSITION)
+TMS_XY:
+	CALL	TMS_XY2IDX		; CONVERT ROW/COL TO BUF IDX
+	LD	(TMS_POS),HL		; SAVE THE RESULT (DISPLAY POSITION)
 	RET
 ;
 ;----------------------------------------------------------------------
@@ -420,10 +420,10 @@ SCG_XY:
 ; D=ROW, E=COL
 ;----------------------------------------------------------------------
 ;
-SCG_XY2IDX:
+TMS_XY2IDX:
 	LD	A,E			; SAVE COLUMN NUMBER IN A
 	LD	H,D			; SET H TO ROW NUMBER
-	LD	E,SCG_COLS		; SET E TO ROW LENGTH
+	LD	E,TMS_COLS		; SET E TO ROW LENGTH
 	CALL	MULT8			; MULTIPLY TO GET ROW OFFSET
 	LD	E,A			; GET COLUMN BACK
 	ADD	HL,DE			; ADD IT IN
@@ -433,15 +433,15 @@ SCG_XY2IDX:
 ; WRITE VALUE IN A TO CURRENT VDU BUFFER POSTION, ADVANCE CURSOR
 ;----------------------------------------------------------------------
 ;
-SCG_PUTCHAR:
+TMS_PUTCHAR:
 	PUSH	AF			; SAVE CHARACTER
-	LD	HL,(SCG_POS)		; LOAD CURRENT POSITION INTO HL
-	CALL	SCG_WR			; SET THE WRITE ADDRESS
+	LD	HL,(TMS_POS)		; LOAD CURRENT POSITION INTO HL
+	CALL	TMS_WR			; SET THE WRITE ADDRESS
 	POP	AF			; RECOVER CHARACTER TO WRITE
-	OUT	(SCG_DATREG),A		; WRITE THE CHARACTER
-	LD	HL,(SCG_POS)		; LOAD CURRENT POSITION INTO HL
+	OUT	(TMS_DATREG),A		; WRITE THE CHARACTER
+	LD	HL,(TMS_POS)		; LOAD CURRENT POSITION INTO HL
 	INC	HL
-	LD	(SCG_POS),HL
+	LD	(TMS_POS),HL
 	RET
 ;
 ;----------------------------------------------------------------------
@@ -451,19 +451,19 @@ SCG_PUTCHAR:
 ;   DE: NUMBER OF CHARACTERS TO FILL
 ;----------------------------------------------------------------------
 ;
-SCG_FILL:
+TMS_FILL:
 	LD	C,A			; SAVE THE CHARACTER TO WRITE
-	LD	HL,(SCG_POS)		; SET STARTING POSITION
-	CALL	SCG_WR			; SET UP FOR WRITE
+	LD	HL,(TMS_POS)		; SET STARTING POSITION
+	CALL	TMS_WR			; SET UP FOR WRITE
 ;
-SCG_FILL1:
+TMS_FILL1:
 	LD	A,C			; RECOVER CHARACTER TO WRITE
-	OUT	(SCG_DATREG),A
-	SCG_IODELAY
+	OUT	(TMS_DATREG),A
+	TMS_IODELAY
 	DEC	DE
 	LD	A,D
 	OR	E
-	JR	NZ,SCG_FILL1
+	JR	NZ,TMS_FILL1
 ;
 	RET
 ;
@@ -471,50 +471,50 @@ SCG_FILL1:
 ; SCROLL ENTIRE SCREEN FORWARD BY ONE LINE (CURSOR POSITION UNCHANGED)
 ;----------------------------------------------------------------------
 ;
-SCG_SCROLL:
+TMS_SCROLL:
 	LD	HL,0			; SOURCE ADDRESS OF CHARACER BUFFER
-	LD	C,SCG_ROWS - 1		; SET UP LOOP COUNTER FOR ROWS - 1
+	LD	C,TMS_ROWS - 1		; SET UP LOOP COUNTER FOR ROWS - 1
 ;
-SCG_SCROLL0:	; READ LINE THAT IS ONE PAST CURRENT DESTINATION
+TMS_SCROLL0:	; READ LINE THAT IS ONE PAST CURRENT DESTINATION
 	PUSH	HL			; SAVE CURRENT DESTINATION
-	LD	DE,SCG_COLS
+	LD	DE,TMS_COLS
 	ADD	HL,DE			; POINT TO NEXT ROW SOURCE
-	CALL	SCG_RD			; SET UP TO READ
-	LD	DE,SCG_BUF
-	LD	B,SCG_COLS
-SCG_SCROLL1:
-	IN	A,(SCG_DATREG)
-	SCG_IODELAY
+	CALL	TMS_RD			; SET UP TO READ
+	LD	DE,TMS_BUF
+	LD	B,TMS_COLS
+TMS_SCROLL1:
+	IN	A,(TMS_DATREG)
+	TMS_IODELAY
 	LD	(DE),A
 	INC	DE
-	DJNZ	SCG_SCROLL1
+	DJNZ	TMS_SCROLL1
 	POP	HL			; RECOVER THE DESTINATION
 ;	
 	; WRITE THE BUFFERED LINE TO CURRENT DESTINATION
-	CALL	SCG_WR			; SET UP TO WRITE
-	LD	DE,SCG_BUF
-	LD	B,SCG_COLS
-SCG_SCROLL2:
+	CALL	TMS_WR			; SET UP TO WRITE
+	LD	DE,TMS_BUF
+	LD	B,TMS_COLS
+TMS_SCROLL2:
 	LD	A,(DE)
-	OUT	(SCG_DATREG),A
-	SCG_IODELAY
+	OUT	(TMS_DATREG),A
+	TMS_IODELAY
 	INC	DE
-	DJNZ	SCG_SCROLL2
+	DJNZ	TMS_SCROLL2
 ;
 	; BUMP TO NEXT LINE
-	LD	DE,SCG_COLS
+	LD	DE,TMS_COLS
 	ADD	HL,DE
 	DEC	C			; DECREMENT ROW COUNTER
-	JR	NZ,SCG_SCROLL0		; LOOP THRU ALL ROWS
+	JR	NZ,TMS_SCROLL0		; LOOP THRU ALL ROWS
 ;
 	; FILL THE NEWLY EXPOSED BOTTOM LINE
-	CALL	SCG_WR
+	CALL	TMS_WR
 	LD	A,' '
-	LD	B,SCG_COLS
-SCG_SCROLL3:
-	OUT	(SCG_DATREG),A
-	SCG_IODELAY
-	DJNZ	SCG_SCROLL3
+	LD	B,TMS_COLS
+TMS_SCROLL3:
+	OUT	(TMS_DATREG),A
+	TMS_IODELAY
+	DJNZ	TMS_SCROLL3
 ;
 	RET
 ;
@@ -522,50 +522,50 @@ SCG_SCROLL3:
 ; REVERSE SCROLL ENTIRE SCREEN BY ONE LINE (CURSOR POSITION UNCHANGED)
 ;----------------------------------------------------------------------
 ;
-SCG_RSCROLL:
-	LD	HL,SCG_COLS * (SCG_ROWS - 1)
-	LD	C,SCG_ROWS - 1
+TMS_RSCROLL:
+	LD	HL,TMS_COLS * (TMS_ROWS - 1)
+	LD	C,TMS_ROWS - 1
 ;
-SCG_RSCROLL0:	; READ THE LINE THAT IS ONE PRIOR TO CURRENT DESTINATION
+TMS_RSCROLL0:	; READ THE LINE THAT IS ONE PRIOR TO CURRENT DESTINATION
 	PUSH	HL			; SAVE THE DESTINATION ADDRESS
-	LD	DE,-SCG_COLS
+	LD	DE,-TMS_COLS
 	ADD	HL,DE			; SET SOURCE ADDRESS
-	CALL	SCG_RD			; SET UP TO READ
-	LD	DE,SCG_BUF		; POINT TO BUFFER
-	LD	B,SCG_COLS		; LOOP FOR EACH COLUMN
-SCG_RSCROLL1:
-	IN	A,(SCG_DATREG)		; GET THE CHAR
-	SCG_IODELAY			; RECOVER
+	CALL	TMS_RD			; SET UP TO READ
+	LD	DE,TMS_BUF		; POINT TO BUFFER
+	LD	B,TMS_COLS		; LOOP FOR EACH COLUMN
+TMS_RSCROLL1:
+	IN	A,(TMS_DATREG)		; GET THE CHAR
+	TMS_IODELAY			; RECOVER
 	LD	(DE),A			; SAVE IN BUFFER
 	INC	DE			; BUMP BUFFER POINTER
-	DJNZ	SCG_RSCROLL1		; LOOP THRU ALL COLS
+	DJNZ	TMS_RSCROLL1		; LOOP THRU ALL COLS
 	POP	HL			; RECOVER THE DESTINATION ADDRESS
 ;
 	; WRITE THE BUFFERED LINE TO CURRENT DESTINATION
-	CALL	SCG_WR			; SET THE WRITE ADDRESS
-	LD	DE,SCG_BUF		; POINT TO BUFFER
-	LD	B,SCG_COLS		; INIT LOOP COUNTER
-SCG_RSCROLL2:
+	CALL	TMS_WR			; SET THE WRITE ADDRESS
+	LD	DE,TMS_BUF		; POINT TO BUFFER
+	LD	B,TMS_COLS		; INIT LOOP COUNTER
+TMS_RSCROLL2:
 	LD	A,(DE)			; LOAD THE CHAR
-	OUT	(SCG_DATREG),A		; WRITE TO SCREEN
-	SCG_IODELAY			; DELAY
+	OUT	(TMS_DATREG),A		; WRITE TO SCREEN
+	TMS_IODELAY			; DELAY
 	INC	DE			; BUMP BUF POINTER
-	DJNZ	SCG_RSCROLL2		; LOOP THRU ALL COLS
+	DJNZ	TMS_RSCROLL2		; LOOP THRU ALL COLS
 ;
 	; BUMP TO THE PRIOR LINE
-	LD	DE,-SCG_COLS		; LOAD COLS (NEGATIVE)
+	LD	DE,-TMS_COLS		; LOAD COLS (NEGATIVE)
 	ADD	HL,DE			; BACK UP THE ADDRESS
 	DEC	C			; DECREMENT ROW COUNTER
-	JR	NZ,SCG_RSCROLL0		; LOOP THRU ALL ROWS
+	JR	NZ,TMS_RSCROLL0		; LOOP THRU ALL ROWS
 ;
 	; FILL THE NEWLY EXPOSED BOTTOM LINE
-	CALL	SCG_WR
+	CALL	TMS_WR
 	LD	A,' '
-	LD	B,SCG_COLS
-SCG_RSCROLL3:
-	OUT	(SCG_DATREG),A
-	SCG_IODELAY
-	DJNZ	SCG_RSCROLL3
+	LD	B,TMS_COLS
+TMS_RSCROLL3:
+	OUT	(TMS_DATREG),A
+	TMS_IODELAY
+	DJNZ	TMS_RSCROLL3
 ;
 	RET
 ;
@@ -573,48 +573,48 @@ SCG_RSCROLL3:
 ; BLOCK COPY BC BYTES FROM HL TO DE
 ;----------------------------------------------------------------------
 ;
-SCG_BLKCPY:
+TMS_BLKCPY:
 	; SAVE DESTINATION AND LENGTH
 	PUSH	BC		; LENGTH
 	PUSH	DE		; DEST
 ;
 	; READ FROM THE SOURCE LOCATION
-SCG_BLKCPY1:
-	CALL	SCG_RD		; SET UP TO READ FROM ADDRESS IN HL
-	LD	DE,SCG_BUF	; POINT TO BUFFER
+TMS_BLKCPY1:
+	CALL	TMS_RD		; SET UP TO READ FROM ADDRESS IN HL
+	LD	DE,TMS_BUF	; POINT TO BUFFER
 	LD	B,C
-SCG_BLKCPY2:
-	IN	A,(SCG_DATREG)	; GET THE NEXT BYTE
-	SCG_IODELAY		; DELAY
+TMS_BLKCPY2:
+	IN	A,(TMS_DATREG)	; GET THE NEXT BYTE
+	TMS_IODELAY		; DELAY
 	LD	(DE),A		; SAVE IN BUFFER
 	INC	DE		; BUMP BUF PTR
-	DJNZ	SCG_BLKCPY2	; LOOP AS NEEDED
+	DJNZ	TMS_BLKCPY2	; LOOP AS NEEDED
 ;
 	; WRITE TO THE DESTINATION LOCATION
 	POP	HL		; RECOVER DESTINATION INTO HL
-	CALL	SCG_WR		; SET UP TO WRITE
-	LD	DE,SCG_BUF	; POINT TO BUFFER
+	CALL	TMS_WR		; SET UP TO WRITE
+	LD	DE,TMS_BUF	; POINT TO BUFFER
 	POP	BC		; GET LOOP COUNTER BACK
 	LD	B,C
-SCG_BLKCPY3:
+TMS_BLKCPY3:
 	LD	A,(DE)		; GET THE CHAR FROM BUFFER
-	OUT	(SCG_DATREG),A	; WRITE TO VDU
-	SCG_IODELAY		; DELAY
+	OUT	(TMS_DATREG),A	; WRITE TO VDU
+	TMS_IODELAY		; DELAY
 	INC	DE		; BUMP BUF PTR
-	DJNZ	SCG_BLKCPY3	; LOOP AS NEEDED
+	DJNZ	TMS_BLKCPY3	; LOOP AS NEEDED
 ;
 	RET
 ;
 ;==================================================================================================
-;   SCG DRIVER - DATA
+;   TMS DRIVER - DATA
 ;==================================================================================================
 ;
-SCG_POS		.DW 	0	; CURRENT DISPLAY POSITION
-SCG_CURSAV	.DB	0	; SAVES ORIGINAL CHARACTER UNDER CURSOR
-SCG_BUF		.FILL	256,0	; COPY BUFFER
+TMS_POS		.DW 	0	; CURRENT DISPLAY POSITION
+TMS_CURSAV	.DB	0	; SAVES ORIGINAL CHARACTER UNDER CURSOR
+TMS_BUF		.FILL	256,0	; COPY BUFFER
 ;
 ;==================================================================================================
-;   SCG DRIVER - TMS9918 REGISTER INITIALIZATION
+;   TMS DRIVER - TMS9918 REGISTER INITIALIZATION
 ;==================================================================================================
 ;
 ; Control Registers (write CMDREG):
@@ -655,7 +655,7 @@ SCG_BUF		.FILL	256,0	; COPY BUFFER
 ; 5S		Fifth sprite (not displayed) detected. Value in FS* is valid.
 ; INT		Set at each screen update, used for interrupts.
 ;
-SCG_INIT9918:
+TMS_INIT9918:
 	.DB	$00		; REG 0 - NO EXTERNAL VID
 	.DB	$50		; REG 1 - ENABLE SCREEN, SET MODE 1
 	.DB	$00		; REG 2 - PATTERN NAME TABLE := 0
@@ -665,11 +665,11 @@ SCG_INIT9918:
 	.DB	$00		; REG 6 - NO SPRITE GENERATOR TABLE
 	.DB	$F0		; REG 7 - WHITE ON BLACK
 ;
-SCG_INIT9918LEN	.EQU	$ - SCG_INIT9918
+TMS_INIT9918LEN	.EQU	$ - TMS_INIT9918
 ;
 ;==================================================================================================
-;   SCG DRIVER - FONT DATA
+;   TMS DRIVER - FONT DATA
 ;==================================================================================================
 ;
-SCG_FONTDATA:
-#INCLUDE "scg_font.inc"
+TMS_FONTDATA:
+#INCLUDE "TMS_font.inc"

Source/HBIOS/tms_font.inc

@@ -1,4 +1,4 @@
-; n8v_font.inc - automatically generated by n8vidtst
+; tms_font.inc - automatically generated by n8vidtst
 	.DB	000h,000h,000h,000h,000h,000h,000h,000h	; 0x00(0)
 	.DB	030h,030h,030h,03ch,03ch,000h,000h,000h	; 0x01(1)
 	.DB	030h,030h,030h,0f0h,0f0h,000h,000h,000h	; 0x02(2)
@@ -255,5 +255,5 @@
 	.DB	000h,0f8h,080h,040h,03ch,0f0h,000h,000h	; 0xfd(253)
 	.DB	0fch,0fch,0fch,0fch,0fch,0fch,0fch,0fch	; 0xfe(254)
 	.DB	000h,000h,000h,000h,000h,000h,000h,000h	; 0xff(255)
-; eof - n8v_font.inc
+; eof - tms_font.inc
 

Source/HBIOS/tty.asm

@@ -89,20 +89,14 @@ TTY_CIOOST:
 ;
 ;
 TTY_CIOINIT:
-	; SETUP AND FORWARD CALL TO PARENT VDA DRIVER'S VDAINIT FUNCTION
-	LD	B,BF_VDAINI	; WE ARE FORWARDING TO VDAINIT FUNCTION
-	LD	A,(TTY_DEVTYPE)	; GET DEVICE TYPE WE ARE EMULATING FOR
-	LD	C,A		; AND PUT IT IN C
-	LD	D,L		; TERMTYPE TO D
-	LD	E,0		; VIDEO MODE = 0
-	LD	HL,0		; NO BITMAP, LEAVE IT ALONG
-	JP	TTY_VDADISP	; LET VDA DRIVER HANDLE IT FROM HERE
+	XOR	A		; NOTHING TO DO, SIGNAL SUCCESS
+	RET			; ... AND RETURN
 ;
 ;
 ;
 TTY_CIOQUERY:
-	LD	DE,0
-	LD	HL,0
+	LD	DE,$FFFF
+	LD	HL,$FFFF
 	XOR	A
 	RET
 ;

Source/HBIOS/uart.asm

@@ -250,7 +250,8 @@ UART0_OST:
 	RET
 ;
 UART0_INITDEV:
-	CALL	PANIC
+	XOR	A			; NOT IMPLEMENTED!!!
+	RET
 ;
 ;
 ;
@@ -362,7 +363,8 @@ UART1_OST:
 	RET
 ;
 UART1_INITDEV:
-	CALL	PANIC
+	XOR	A			; NOT IMPLEMENTED!!!
+	RET
 ;
 ;
 ;

Source/HBIOS/util.asm

@@ -347,16 +347,16 @@ _REGDMP:
 	LD	(REGDMP_PC),HL		; SAVE PC VALUE
 	EX	(SP),HL			; BACK THE WAY IT WAS
 
-	LD	(UTSTKSAV),SP		; SAVE ORIGINAL STACK POINTER
-	LD	SP,UTPRVSTK		; SWITCH TO PRIVATE STACK
+	LD	(REGDMP_SP),SP		; SAVE STACK POINTER
+
+	;LD	(RD_STKSAV),SP		; SAVE ORIGINAL STACK POINTER
+	;LD	SP,RD_STACK		; SWITCH TO PRIVATE STACK
 
 	PUSH	AF
 	PUSH	BC
 	PUSH	DE
 	PUSH	HL
 
-	CALL	PC_LBKT
-
 	PUSH	AF
 	LD	A,'@'
 	CALL	COUT
@@ -364,9 +364,9 @@ _REGDMP:
 	
 	PUSH	BC
 	LD	BC,(REGDMP_PC)
-	CALL	PRTHEXWORD
+	CALL	PRTHEXWORD		; PC
 	POP	BC
-	CALL	PC_COLON
+	CALL	PC_LBKT
 	PUSH	BC
 	PUSH	AF
 	POP	BC
@@ -383,7 +383,7 @@ _REGDMP:
 	POP	BC
 	CALL	PRTHEXWORD		; HL
 	CALL	PC_COLON
-	LD	BC,(UTSTKSAV)
+	LD	BC,(REGDMP_SP)
 	CALL	PRTHEXWORD		; SP
 
 	CALL	PC_RBKT
@@ -394,12 +394,17 @@ _REGDMP:
 	POP	BC
 	POP	AF
 
-	LD	SP,(UTSTKSAV)		; BACK TO ORIGINAL STACK FRAME
+	;LD	SP,(RD_STKSAV)		; BACK TO ORIGINAL STACK FRAME
 	
 	JP	$FFFF			; RETURN, $FFFF IS DYNAMICALLY UPDATED
 REGDMP_RET	.EQU	$-2		; RETURN ADDRESS GOES HERE
 ;
 REGDMP_PC	.DW	0
+REGDMP_SP	.DW	0
+;
+;RD_STKSAV	.DW	0
+;		.FILL	$FF,16*2	; 16 LEVEL PRIVATE STACK
+;RD_STACK	.EQU	$
 ;
 ;
 ;
@@ -876,9 +881,3 @@ ST32:
 	LD	(BC),A
 	POP	AF
 	RET
-;
-; PRIVATE STACK
-;
-UTSTKSAV	.DW	0
-		.FILL	$FF,64		; 32 LEVEL PRIVATE STACK SPACE
-UTPRVSTK	.EQU	$