Merge pull request #35 from b1ackmai1er/NASCOM-VDU-GRAPHICS

ECB-VDU: Add cursor style options

Source/HBIOS/vdu.asm

@@ -5,12 +5,13 @@
 ;	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
+;	ADD CURSOR STYLE OPTIONS: PHIL SUMMERS -- 19/10/2019
 ;======================================================================
 ;
 ;	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.
+;	SELECTED VIA ONBOARD JUMPERS. THE FONT ROM CAN CONTAIN EIGHT 2Kb FONTS.
 ;
 ; TODO:
 ;   - ADD REMAINING REGISTERS TO INIT
@@ -33,6 +34,18 @@ VDU_PPIB	.EQU	VDU_BASE + $05	; PPI PORT B
 VDU_PPIC	.EQU	VDU_BASE + $06	; PPI PORT C
 VDU_PPIX	.EQU	VDU_BASE + $07	; PPI CONTROL PORT
 ;
+;
+VDU_NOBL	.EQU	00000000B	; NO BLINK
+VDU_NOCU	.EQU	00100000B	; NO CURSOR
+VDU_BFAS	.EQU	01000000B	; BLINK AT X16 RATE
+VDU_BSLO	.EQU	01100000B	; BLINK AT X32 RATE
+;
+VDU_BLOK	.EQU	0		; BLOCK CURSOR
+VDU_ULIN	.EQU	1		; UNDERLINE CURSOR
+;
+VDU_CSTY	.EQU	VDU_BLOK	; DEFAULT CURSOR STYLE
+VDU_BLNK	.EQU	VDU_NOBL	; DEFAULT BLINK RATE
+;
 TERMENABLE	.SET	TRUE		; INCLUDE TERMINAL PSEUDODEVICE DRIVER
 
 #IF (VDUSIZ=V80X24)
@@ -61,6 +74,16 @@ DROWS		.EQU	80
 DSCANL		.EQU	12
 #ENDIF
 ;
+#IF VDU_CSTY=VDU_BLOK
+VDU_R10		.EQU	(VDU_BLNK + $00)	
+VDU_R11		.EQU	DSCANL-1
+#ENDIF
+;
+#IF VDU_CSTY=VDU_ULIN
+VDU_R10		.EQU	(VDU_BLNK + DSCANL-1)	
+VDU_R11		.EQU	DSCANL-1
+#ENDIF		
+;
 ;
 ;======================================================================
 ; VDU DRIVER - INITIALIZATION
@@ -164,6 +187,9 @@ VDU_VDADEV:
 	RET
 
 VDU_VDASCS:
+				; CURSOR START := TOP NIBBLE OF D
+				; CURSOR FINISH := BOTTOM NIBBLE OF D
+
 	CALL	PANIC		; NOT IMPLEMENTED (YET)
 	
 VDU_VDASCP:
@@ -310,7 +336,14 @@ VDU_CRTINIT1:
 	INC	HL			; POINT TO NEXT VALUE
 	INC	C			; POINT TO NEXT REGISTER
 	DJNZ	VDU_CRTINIT1		; LOOP
-    	RET
+
+	LD	HL,VDU_INIT6845+10	; SAVE
+	LD	A,(HL)			; DEFAULT
+	LD	(VDU_CS),A		; CURSOR
+	INC	HL			; SCANLINE
+	LD	A,(HL)			; START AND
+	LD	(VDU_CE),A		; FINISH
+    	RET				; POSITION
 ;
 ;----------------------------------------------------------------------
 ; CONVERT XY COORDINATES IN DE INTO LINEAR INDEX IN HL
@@ -344,7 +377,7 @@ VDU_XY:
 	JP	VDU_WRREGX		; DO IT AND RETURN
 ;
 ;----------------------------------------------------------------------
-; WRITE VALUE IN A TO CURRENT VDU BUFFER POSTION, ADVANCE CURSOR
+; WRITE VALUE IN A TO CURRENT VDU BUFFER POSITION, ADVANCE CURSOR
 ;----------------------------------------------------------------------
 ;
 VDU_PUTCHAR:
@@ -530,7 +563,6 @@ 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 -80x24 10x8
@@ -553,8 +585,8 @@ VDU_INIT6845:
 					;		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
+VDU_CS:	.DB	VDU_R10			; R10 CURSOR START RASTER
+VDU_CE:	.DB	VDU_R11			; R11 CURSOR END RASTER
 	.DB	00H			; R12 START ADDRESS HI
 	.DB	00H			; R13 START ADDRESS LO
 	.DB	00H			; R14 CURSOR ADDRESS HI
@@ -582,8 +614,8 @@ VDU_INIT6845:
 ;					;		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
+VDU_CS:	.DB	VDU_R10			; R10 CURSOR START RASTER
+VDU_CE:	.DB	VDU_R11			; R11 CURSOR END RASTER
 	.DB	00H			; R12 START ADDRESS HI
 	.DB	00H			; R13 START ADDRESS LO
 	.DB	00H			; R14 CURSOR ADDRESS HI
@@ -611,8 +643,8 @@ VDU_INIT6845:
 ;					;		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
+VDU_CS:	.DB	VDU_R10			; R10 CURSOR START RASTER
+VDU_CE:	.DB	VDU_R11			; R11 CURSOR END RASTER
 	.DB	00H			; R12 START ADDRESS HI
 	.DB	00H			; R13 START ADDRESS LO
 	.DB	00H			; R14 CURSOR ADDRESS HI
@@ -640,8 +672,8 @@ VDU_INIT6845:
 ;					;		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
+VDU_CS:	.DB	VDU_R10			; R10 CURSOR START RASTER
+VDU_CE:	.DB	VDU_R11			; R11 CURSOR END RASTER
 	.DB	00H			; R12 START ADDRESS HI
 	.DB	00H			; R13 START ADDRESS LO
 	.DB	00H			; R14 CURSOR ADDRESS HI
@@ -669,8 +701,8 @@ VDU_INIT6845:
 ;					;		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
+VDU_CS:	.DB	VDU_R10			; R10 CURSOR START RASTER
+VDU_CE:	.DB	VDU_R11			; R11 CURSOR END RASTER
 	.DB	00H			; R12 START ADDRESS HI
 	.DB	00H			; R13 START ADDRESS LO
 	.DB	00H			; R14 CURSOR ADDRESS HI