VDU Driver Enhancements

VDU driver enhanced to support alternate screen simensions, provided by Phil Summers

Doc/ChangeLog.txt

@@ -13,15 +13,17 @@ Version 2.9.1
 - WBW: Preliminary support for RC180 platform (Z180 module in RC2014)
 - WBW: Added NZCOM distribution files to third slice of hard disk image
 - WBW: Fixed getnum32 bug in MODE command (found by Phil Summers)
-- P?S: Added serial support for Zilog Peripherals Baord
+- PMS: Added serial support for Zilog Peripherals Baord
 - WBW: Added preliminary support for interrupt management API
 - PMS: Improved boot messages in RAM-Floppy driver
 - PMS: Added charge setting display to RTC boot messages
 - WBW: Add SmallZ80 support to FDU
 - WBW: Refactored Debug Monitor w/ improved syntax parsing and help
 - PMS: Added Forth, Nascom BASIC, and Tasty BASIC to ROM
-- PMS: Refactored Rom Loader to support more ROM images, now table driven
+- PMS: Refactored ROM Loader to support more ROM images, now table driven
 - WBW: Refactored DSKY code
+- S?K: Initial support for Easy Z80
+- PMS: Enhance VDU driver to support alternative screen dimensions
 
 Version 2.9.0
 -------------

ReadMe.txt

@@ -7,7 +7,7 @@
 ***********************************************************************
 
 Wayne Warthen (wwarthen@gmail.com)
-Version 2.9.1-pre.9, 2019-02-19
+Version 2.9.1-pre.11, 2019-03-05
 https://www.retrobrewcomputers.org/
 
 RomWBW is a ROM-based implementation of CP/M-80 2.2 and Z-System for 

Source/CBIOS/ver.inc

@@ -2,4 +2,4 @@
 #DEFINE	RMN	9
 #DEFINE	RUP	1
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"2.9.1-pre.10"
+#DEFINE BIOSVER	"2.9.1-pre.11"

Source/HBIOS/Config/SBC_std.asm

@@ -22,5 +22,7 @@ PRPENABLE	.SET	TRUE		; TRUE FOR PROPIO BOARD SUPPORT (VIDEO, KBD, & SD CARD)
 VGAENABLE	.SET	TRUE		; TRUE FOR VGA BOARD VIDEO & KBD SUPPORT
 CVDUENABLE	.SET	TRUE		; TRUE FOR CVDU BOARD VIDEO & KBD SUPPORT
 VDUENABLE	.SET	FALSE		; TRUE FOR VDU BOARD VIDEO & KBD SUPPORT
+VDUSIZ		.SET	V80X24		; DEFAULT VDU FORMAT IF ACTIVE
+;
 ;
 CRTACT		.SET	TRUE		; TRUE TO ACTIVATE CRT AT STARTUP (BOOT ON CRT)

Source/HBIOS/cfg_sbc.asm

@@ -39,6 +39,7 @@ CVDUENABLE	.EQU	FALSE		; TRUE FOR CVDU BOARD SUPPORT
 NECENABLE	.EQU	FALSE		; TRUE FOR uPD7220 BOARD SUPPORT
 TMSENABLE	.EQU	FALSE		; TRUE FOR N8 (TMS9918) VIDEO/KBD SUPPORT
 VGAENABLE	.EQU	FALSE		; TRUE FOR VGA VIDEO/KBD SUPPORT
+VDUSIZ		.EQU	V80X25		; VDU DISPLAY FORMAT V80X24, V80X25, V80X30
 ;
 SPKENABLE	.EQU	FALSE		; TRUE FOR RTC LATCH IOBIT SOUND
 AYENABLE	.EQU	FALSE		; TRUE FOR AY PSG SOUND
@@ -94,5 +95,6 @@ BOOTTYPE	.EQU	BT_MENU		; BT_MENU (WAIT FOR KEYPRESS), BT_AUTO (BOOT_DEFAULT AFTE
 BOOT_TIMEOUT	.EQU	20		; APPROX TIMEOUT IN SECONDS FOR AUTOBOOT, 0 FOR IMMEDIATE
 BOOT_DEFAULT	.EQU	'Z'		; SELECTION TO INVOKE AT TIMEOUT
 
-PIOENABLE	.EQU	FALSE		; TRUE FOR ZILOG PIO SUPPORT
-PIOMODE		.EQU	PIOMODE_ZP	; PIOMODE_ZP=ECB-ZILOG PERIPHERALS BOARD PIOMODE_4P=ECB-4PIO
+PIO_4P		.EQU	FALSE		; TRUE FOR ECB-4PIO PIO SUPPORT
+PIO_ZP		.EQU	FALSE		; TRUE FOR ECB-ZILOG PERIPHERALS BOARD
+PPI_SBC		.EQU	FALSE		; TRUE FOR SBC V2 8255 (IF NOT BEING USED FOR PPIDE)

Source/HBIOS/std.asm

@@ -80,16 +80,10 @@ SIOMODE_SMB	.EQU	2		; RC2014 SIO MODULE (SCOTT BAKER)
 SIOMODE_ZP	.EQU	3		; ECB-ZILOG PERIPHERALS BOARD
 SIOMODE_EZZ80	.EQU	4		; EASY Z80 ON-BOARD SIO/0
 ;
-; PIO MODE SELECTIONS
-;
-PIOMODE_NONE	.EQU	0
-PIOMODE_4P	.EQU	1		; ECB-4PIO BOARD
-PIOMODE_ZP	.EQU	2		; ECB-ZILOG PERIPHERALS BOARD
-;
 ; TYPE OF CONSOLE BELL TO USE
 ;
 CONBELL_NONE	.EQU	0
-CONBELL_PSG		.EQU	1
+CONBELL_PSG	.EQU	1
 CONBELL_IOBIT	.EQU	2
 ;
 ; FD MODE SELECTIONS
@@ -222,7 +216,13 @@ SER_460800_8N1	.EQU	SER_BAUD460800 | SER_DATA8 | SER_PARNONE | SER_STOP1
 SER_921600_8N1	.EQU	SER_BAUD921600 | SER_DATA8 | SER_PARNONE | SER_STOP1		
 SER_1843200_8N1	.EQU	SER_BAUD1843200 | SER_DATA8 | SER_PARNONE | SER_STOP1		
 SER_3686400_8N1	.EQU	SER_BAUD3686400 | SER_DATA8 | SER_PARNONE | SER_STOP1		
-SER_7372800_8N1	.EQU	SER_BAUD7372800 | SER_DATA8 | SER_PARNONE | SER_STOP1		
+SER_7372800_8N1	.EQU	SER_BAUD7372800 | SER_DATA8 | SER_PARNONE | SER_STOP1	
+;
+; ECB-VDU MODES
+;
+V80X24		.EQU	0
+V80X25		.EQU	1
+V80X30		.EQU	2
 ;
 ; INTERRUPT VECTOR TABLE ENTRY OFFSETS (Z180 COMPATIBLE)
 ;
@@ -235,6 +235,10 @@ IVT_DMA1	.EQU	10
 IVT_CSIO	.EQU	12
 IVT_SER0	.EQU	14
 IVT_SER1	.EQU	16
+IVT_PIO0	.EQU	18
+IVT_PIO1	.EQU	20
+IVT_PIO2	.EQU	22
+IVT_PIO3	.EQU	24
 ;
 #INCLUDE "build.inc"			; INCLUDE USER CONFIG, ADD VARIANT, TIMESTAMP, & ROMSIZE
 ;

Source/HBIOS/vdu.asm

@@ -1,15 +1,19 @@
 ;======================================================================
-;	VDU DRIVER FOR SBC PROJECT
+;	VDU DRIVER FOR ECB-VDU PROJECT
 ;
 ;	ORIGINALLY WRITTEN BY: ANDREW LYNCH
 ;	REVISED/ENHANCED BY DAN WERNER -- 11/7/2009
 ;	ROMWBW ADAPTATION BY: WAYNE WARTHEN -- 11/9/2012
+;	80X25, 80X30 AND MODE INFO AT BOOT ADDED BY: PHIL SUMMERS -- 2/3/2019
 ;======================================================================
 ;
+;	VDU-DW.ZIP IS THE DEFAULY 10X8 FONT THAT SUITS 80X25 AND 80X26 MODE.
+;	IN 80X30 MODE THE DESCENDERS ARE MISSING. AN ALTERNATE 8x8 FONT MAY
+;	DISPLAY BETTER. THIS CAN BE ADDED TO THE ECB-VDU FONT EPROM AND
+;	SELECTED VIA ONBOARD JUMPERS.THE FONT ROM CAN CONTAIN EIGHT 2Kb FONTS.
+;
 ; TODO:
 ;   - ADD REMAINING REGISTERS TO INIT
-;   - TRY 25 ROW MODE?
-;   - IMPLEMENT CONSTANTS FOR SCREEN DIMENSIONS
 ;   - IMPLEMENT SET CURSOR STYLE (VDASCS) FUNCTION
 ;   - IMPLEMENT ALTERNATE DISPLAY MODES?
 ;
@@ -30,6 +34,22 @@ VDU_PPIC	.EQU	VDU_BASE + $06	; PPI PORT C
 VDU_PPIX	.EQU	VDU_BASE + $07	; PPI CONTROL PORT
 ;
 TERMENABLE	.SET	TRUE		; INCLUDE TERMINAL PSEUDODEVICE DRIVER
+
+#IF (VDUSIZ=V80X24)
+DLINES		.EQU	24	
+DROWS		.EQU	80
+DSCANL		.EQU	10
+#ENDIF
+#IF (VDUSIZ=V80X25)
+DLINES		.EQU	25	
+DROWS		.EQU	80
+DSCANL		.EQU	10
+#ENDIF
+#IF (VDUSIZ=V80X30)
+DLINES		.EQU	30	
+DROWS		.EQU	80
+DSCANL		.EQU	8
+#ENDIF
 ;
 ;======================================================================
 ; VDU DRIVER - INITIALIZATION
@@ -42,6 +62,14 @@ VDU_INIT:
 	PRTS("VDU: IO=0x$")
 	LD	A,VDU_RAMRD
 	CALL	PRTHEXBYTE
+
+	PRTS(" MODE= $")		; OUTPUT DISPLAY FORMAT
+	LD	A,DROWS
+	CALL	PRTDECB
+	PRTS("X$")
+	LD	A,DLINES
+	CALL	PRTDECB
+
 	CALL	VDU_PROBE		; CHECK FOR HW EXISTENCE
 	JR	Z,VDU_INIT1		; CONTINUE IF HW PRESENT
 ;
@@ -101,10 +129,10 @@ VDU_VDAINI:
 	RET
 
 VDU_VDAQRY:
-	LD	C,$00		; MODE ZERO IS ALL WE KNOW
-	LD	DE,$1850	; 24 ROWS ($18), 80 COLS ($50)
-	LD	HL,0		; EXTRACTION OF CURRENT BITMAP DATA NOT SUPPORTED
-	XOR	A		; SIGNAL SUCCESS
+	LD	C,$00			; MODE ZERO IS ALL WE KNOW
+	LD	DE,(DLINES*256)+DROWS	; D=DLINES, E=DROWS
+	LD	HL,0			; EXTRACTION OF CURRENT BITMAP DATA NOT SUPPORTED
+	XOR	A			; SIGNAL SUCCESS
 	RET
 	
 VDU_VDARES:
@@ -281,7 +309,7 @@ VDU_CRTINIT1:
 VDU_XY2IDX:
 	LD	A,E			; SAVE COLUMN NUMBER IN A
 	LD	H,D			; SET H TO ROW NUMBER
-	LD	E,80			; SET E TO ROW LENGTH
+	LD	E,DROWS			; SET E TO ROW LENGTH
 	CALL	MULT8			; MULTIPLY TO GET ROW OFFSET
 	LD	E,A			; GET COLUMN BACK
 	ADD	HL,DE			; ADD IT IN
@@ -294,7 +322,7 @@ VDU_XY2IDX:
 VDU_XY:
 	LD	A,E			; SAVE COLUMN NUMBER IN A
 	LD	H,D			; SET H TO ROW NUMBER
-	LD	E,80			; SET E TO ROW LENGTH
+	LD	E,DROWS			; SET E TO ROW LENGTH
 	CALL	MULT8			; MULTIPLY TO GET ROW OFFSET
 	LD	E,A			; GET COLUMN BACK
 	ADD	HL,DE			; ADD IT IN
@@ -317,7 +345,7 @@ VDU_PUTCHAR:
 	ADD	HL,DE
 	INC	DE		; INC
 	LD	(VDU_POS),DE	; SAVE NEW SCREEN POSITION
-	LD	C,18		; UPDATE ADDRESS REGISTER PAIR
+	LD	C,18		; UPDATE ADDRESS REGISTER PAIR ????????????????????
 	CALL	VDU_WRREGX	; DO IT
 	INC	HL		; NEW CURSOR POSITION
 	LD	C,14		; CURSOR POSITION REGISTER PAIR
@@ -428,7 +456,7 @@ VDU_BLKCPY2:	; BUFFER -> VIDEO RAM COPY LOOP
 VDU_SCROLL:
 	; SCROLL FORWARD BY ADDING ONE ROW TO DISPLAY START ADDRESS
 	LD	HL,(VDU_OFFSET)
-	LD	DE,80
+	LD	DE,DROWS
 	ADD	HL,DE
 	LD	(VDU_OFFSET),HL
 	LD	C,12
@@ -437,9 +465,9 @@ VDU_SCROLL:
 	; FILL EXPOSED LINE
 	LD	HL,(VDU_POS)
 	PUSH	HL
-	LD	HL,23*80
+	LD	HL,(DLINES-1)*DROWS
 	LD	(VDU_POS),HL
-	LD	DE,80
+	LD	DE,DROWS
 	LD	A,' '
 	CALL	VDU_FILL
 	POP	HL
@@ -459,7 +487,7 @@ VDU_SCROLL:
 VDU_RSCROLL:
 	; SCROLL BACKWARD BY SUBTRACTING ONE ROW FROM DISPLAY START ADDRESS
 	LD	HL,(VDU_OFFSET)
-	LD	DE,-80
+	LD	DE,-DROWS
 	ADD	HL,DE
 	LD	(VDU_OFFSET),HL
 	LD	C,12
@@ -470,7 +498,7 @@ VDU_RSCROLL:
 	PUSH	HL
 	LD	HL,0
 	LD	(VDU_POS),HL
-	LD	DE,80
+	LD	DE,DROWS
 	LD	A,' '
 	CALL	VDU_FILL
 	POP	HL
@@ -491,22 +519,20 @@ VDU_POS		.DW 	0		; CURRENT DISPLAY POSITION
 VDU_OFFSET	.DW 	0		; CURRENT DISPLAY POSITION
 VDU_BUF		.FILL	256,0		; COPY BUFFER
 ;
+
+#IF	(VDUSIZ=V80X24)
 ;==================================================================================================
-;   VDU DRIVER - SY6845 REGISTER INITIALIZATION
+;   VDU DRIVER - SY6845 REGISTER INITIALIZATION -80x24 10x8
 ;==================================================================================================
 ;
 VDU_INIT6845:
-;     DB  07FH, 50H, 60H, 7CH, 19H, 1FH, 19H, 1AH, 78H, 09H, 60H, 09H, 00H, 00H, 00H, 00H
-;
-					; CCIR 625/50 VERSION (USED IN MOST OF THE WORLD)
-					; JUMPER K1 2-3, K2 1-2 FOR 2MHz CHAR CLOCK
 	.DB	07FH			; R0 TOTAL NUMBER OF HORIZONTAL CHARACTERS (DETERMINES HSYNC)
-	.DB	050H			; R1 NUMBER OF HORIZONTAL CHARACTERS DISPLAYED (80 COLUMNS)
+	.DB	DROWS			; R1 NUMBER OF HORIZONTAL CHARACTERS DISPLAYED (80 COLUMNS)
 	.DB	060H			; R2 HORIZONTAL SYNC POSITION
 	.DB	00CH			; R3 SYNC WIDTHS
 	.DB	01EH			; R4 VERTICAL TOTAL (TOTAL CHARS IN A FRAME -1)
 	.DB	002H			; R5 VERTICAL TOTAL ADJUST (
-	.DB	018H			; R6 VERTICAL DISPLAYED (24 ROWS)
+	.DB	DLINES			; R6 VERTICAL DISPLAYED (24 ROWS)
 	.DB	01AH			; R7 VERTICAL SYNC
 	.DB	078H			; R8 MODE	B7=0 TRANSPARENT UPDATE DURING BLANKING
 					;		B6=1 PIN 34 IS UPDATE STROBE
@@ -515,14 +541,76 @@ VDU_INIT6845:
 					;		B3=1 TRANSPARENT MEMORY ADDRESSING
 					;		B2=0 RAM STRAIGHT BINARY ADDRESSING
 					;		B1,B0=0 NON-INTERLACE
-	.DB	009H			; R9 SCAN LINE (LINES PER CHAR AND SPACING -1)
+	.DB	DSCANL-1		; R9 SCAN LINE (LINES PER CHAR AND SPACING -1)
 	.DB	060H			; R10 CURSOR START RASTER
-	.DB	009H			; R11 CURSOR END RASTER
+	.DB	DSCANL-1		; R11 CURSOR END RASTER
 	.DB	00H			; R12 START ADDRESS HI
 	.DB	00H			; R13 START ADDRESS LO
 	.DB	00H			; R14 CURSOR ADDRESS HI
 	.DB	00H			; R15 CURSOR ADDRESS LO
 ;
+#ENDIF
+#IF	(VDUSIZ=V80X25)
+;==================================================================================================
+;   VDU DRIVER - SY6845 REGISTER INITIALIZATION -80x25 10x8
+;==================================================================================================
+VDU_INIT6845:
+	.DB	07FH			; R0 TOTAL NUMBER OF HORIZONTAL CHARACTERS (DETERMINES HSYNC)
+	.DB	DROWS			; R1 NUMBER OF HORIZONTAL CHARACTERS DISPLAYED =80
+	.DB	060H			; R2 HORIZONTAL SYNC POSITION
+	.DB	00CH			; R3 SYNC WIDTHS
+	.DB	01EH			; R4 VERTICAL TOTAL (TOTAL CHARS IN A FRAME -1)
+	.DB	002H			; R5 VERTICAL TOTAL ADJUST (
+	.DB	DLINES			; R6 VERTICAL DISPLAYED (25 ROWS)
+	.DB	01BH			; R7 VERTICAL SYNC
+	.DB	078H			; R8 MODE	B7=0 TRANSPARENT UPDATE DURING BLANKING
+;					;		B6=1 PIN 34 IS UPDATE STROBE
+;					;		B5=1 DELAY CURSOR 1 CHARACTER
+;					;		B4=1 DELAY DISPLAY ENABLE 1 CHARACTER
+;					;		B3=1 TRANSPARENT MEMORY ADDRESSING
+;					;		B2=0 RAM STRAIGHT BINARY ADDRESSING
+;					;		B1,B0=0 NON-INTERLACE
+	.DB	DSCANL-1		; R9 SCAN LINE (LINES PER CHAR AND SPACING -1)
+	.DB	060H			; R10 CURSOR START RASTER
+	.DB	DSCANL-1		; R11 CURSOR END RASTER
+	.DB	00H			; R12 START ADDRESS HI
+	.DB	00H			; R13 START ADDRESS LO
+	.DB	00H			; R14 CURSOR ADDRESS HI
+	.DB	00H			; R15 CURSOR ADDRESS LO
+;
+#ENDIF
+#IF	(VDUSIZ=V80X30)
+;==================================================================================================
+;   VDU DRIVER - SY6845 REGISTER INITIALIZATION -80x30 8x8
+;==================================================================================================
+VDU_INIT6845:
+	.DB	07FH			; R0 TOTAL NUMBER OF HORIZONTAL CHARACTERS (DETERMINES HSYNC)
+	.DB	DROWS			; R1 NUMBER OF HORIZONTAL CHARACTERS DISPLAYED =80
+	.DB	060H			; R2 HORIZONTAL SYNC POSITION
+	.DB	00CH			; R3 SYNC WIDTHS
+	.DB	26H			; R4 VERTICAL TOTAL (TOTAL CHARS IN A FRAME -1) (39-1)
+	.DB	00H			; R5 VERTICAL TOTAL ADJUST (
+	.DB	DLINES			; R6 VERTICAL DISPLAYED (30 ROWS)
+	.DB	22H			; R7 VERTICAL SYNC
+	.DB	078H			; R8 MODE	B7=0 TRANSPARENT UPDATE DURING BLANKING
+;					;		B6=1 PIN 34 IS UPDATE STROBE
+;					;		B5=1 DELAY CURSOR 1 CHARACTER
+;					;		B4=1 DELAY DISPLAY ENABLE 1 CHARACTER
+;					;		B3=1 TRANSPARENT MEMORY ADDRESSING
+;					;		B2=0 RAM STRAIGHT BINARY ADDRESSING
+;					;		B1,B0=0 NON-INTERLACE
+	.DB	DSCANL-1		; R9 SCAN LINE (LINES PER CHAR AND SPACING -1)
+	.DB	060H			; R10 CURSOR START RASTER
+	.DB	DSCANL-1		; R11 CURSOR END RASTER
+	.DB	00H			; R12 START ADDRESS HI
+	.DB	00H			; R13 START ADDRESS LO
+	.DB	00H			; R14 CURSOR ADDRESS HI
+	.DB	00H			; R15 CURSOR ADDRESS LO
+;
+#ENDIF
+; CCIR 625/50 VERSION (USED IN MOST OF THE WORLD)
+; JUMPER K1 2-3, K2 1-2 FOR 2MHz CHAR CLOCK
+;
 ; THE CCIR 625/50 TELEVISION STANDARD HAS 625 LINES INTERLACED AT 50 FIELDS PER SECOND.  THIS WORKS 
 ; OUT AS 50 FIELDS OF 312.5 LINES PER SECOND NON-INTERLACED AS USED HERE.
 ; HORIZONTAL LINE WIDTH IS 64uS.  FOR A 2 MHz CHARACTER CLOCK (R0+1)/2000000 = 64uS

Source/HBIOS/ver.inc

@@ -2,4 +2,4 @@
 #DEFINE	RMN	9
 #DEFINE	RUP	1
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"2.9.1-pre.10"
+#DEFINE BIOSVER	"2.9.1-pre.11"