Merge JGH's latest VDU driver updates. (Attempt #2)
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Bobbi Webber-Manners
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applecorn.po
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applecorn.po
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168
auxmem.gfx.s
168
auxmem.gfx.s
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@ -2,6 +2,160 @@
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* (c) Bobbi 2021 GPLv3
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*
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* Graphics operations
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*
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* 26-Sep-2021 All graphics screen code moved to here.
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* Write character to HGR screen
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PRCHRSOFT CMP #$A0 ; Convert to screen code
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BCS :B0
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CMP #$80
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BCC :B0
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EOR #$80
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:B0 TAX
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AND #$20
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BNE :B1
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TXA
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EOR #$40
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TAX
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:B1 PHX
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JSR HCHARADDR ; Addr in VDUADDR
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PHP ; Disable IRQs while
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SEI ; toggling memory
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STA $C004 ; Write to main
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LDA VDUADDR+0
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STA HGRADDR+0
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LDA VDUADDR+1
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STA HGRADDR+1
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STA $C005 ; Write to aux
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PLP ; Restore IRQs
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PLA ; Recover character
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>>> XF2MAIN,DRAWCHAR ; Plot char on HGR screen
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PUTCHRET >>> ENTAUX
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RTS
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HSCR1LINE >>> XF2MAIN,HGRSCR1L
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HSCR1RET >>> ENTAUX
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RTS
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HSCRCLREOL LDA VDUTEXTY
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ASL
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TAX
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>>> WRTMAIN
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LDA HGRTAB+0,X
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STA HGRADDR+0
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LDA HGRTAB+1,X
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STA HGRADDR+1
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>>> WRTAUX
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>>> XF2MAIN,HCLRLINE
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HSCRCLEAR >>> XF2MAIN,CLRHGR
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VDU16RET >>> ENTAUX
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STZ XPIXEL+0
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STZ XPIXEL+1
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LDA #191
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STA YPIXEL
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RTS
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CLRLNRET >>> ENTAUX
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RTS
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* X=txt colour
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HSCRSETTCOL RTS
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* X=gfx colour, A=gcol action
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* GCOL actions:
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* 0 = SET pixel
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* 1 = ORA with pixel
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* 2 = AND with pixel
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* 3 = XOR with pixel
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* 4 = NOT pixel
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* 5 = NUL no change to pixel
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* 6 = CLR clear pixel to background
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* 7 = UND undefined
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HSCRSETGCOL PHX
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LDX #$00 ; Normal drawing mode
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CMP #$04 ; k=4 means toggle
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BNE :NORM
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LDX #$01 ; Change to toggle mode
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:NORM >>> WRTMAIN
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TXA
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STX LINETYPE
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STX FDRAWADDR+5
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>>> WRTAUX
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>>> XF2MAIN,SETLINE
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VDU18RET1 >>> ENTAUX
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:NORM PLA ; Colour
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BPL :FOREGND ; <128 is foreground
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>>> WRTMAIN
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AND #$7F
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STA BGCOLOR ; Stored in main memory
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>>> WRTAUX
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RTS
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:FOREGND >>> WRTMAIN
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STA FGCOLOR ; Stored in main memory
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>>> WRTAUX
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RTS
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* Plot actions, PLOT k,x,y
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* k is in VDUQ+4
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* x is in VDUQ+5,VDUQ+6
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* y is in VDUQ+7,VDUQ+8
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HGRPLOT JSR CVTCOORD ; Convert coordinate system
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HGRPLOT2 LDA VDUQ+4
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AND #$04 ; Bit 2 set -> absolute
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BNE HGRPLOTABS
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JSR RELCOORD ; Add coords to XPIXEL/YPIXEL
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HGRPLOTABS LDA VDUQ+4
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AND #$03
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CMP #$0 ; Bits 0,1 clear -> just move
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BNE HGRPLOTACT
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HGRPLOTPOS JMP HGRPOS ; Just update pos
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HGRPLOTACT LDA VDUQ+4
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AND #$C0
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CMP #$40 ; Bit 7 clr, bit 6 set -> point
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BNE :LINE
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>>> WRTMAIN
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LDA VDUQ+4
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STA PLOTMODE
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LDA VDUQ+5
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STA FDRAWADDR+6 ; LSB of X1
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LDA VDUQ+6
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STA FDRAWADDR+7 ; MSB of X1
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LDA VDUQ+7
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STA FDRAWADDR+8 ; Y1
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>>> WRTAUX
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>>> XF2MAIN,DRAWPNT
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:LINE >>> WRTMAIN
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LDA VDUQ+4
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STA PLOTMODE
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LDA XPIXEL+0
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STA FDRAWADDR+6
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LDA XPIXEL+1
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STA FDRAWADDR+7
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LDA YPIXEL
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STA FDRAWADDR+8
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LDA VDUQ+5
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STA FDRAWADDR+9 ; LSB of X1
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LDA VDUQ+6
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STA FDRAWADDR+10 ; MSB of X1
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LDA VDUQ+7
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STA FDRAWADDR+11 ; Y1
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>>> WRTAUX
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>>> XF2MAIN,DRAWLINE
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VDU25RET >>> ENTAUX
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* Fall through into HGRPOS
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* Save pixel X,Y position
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HGRPOS LDA VDUQ+5
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STA XPIXEL+0
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LDA VDUQ+6
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STA XPIXEL+1
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LDA VDUQ+7
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STA YPIXEL
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RTS
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XPIXEL DW $0000 ; Previous plot x-coord
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YPIXEL DW $0000 ; Previous plot y-coord
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* Convert high-resolution screen coordinates
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* from 1280x1024 to 280x192
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@ -59,7 +213,7 @@ CVTCOORD
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ROR ZP2+0
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LSR A
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ROR ZP2+0
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LSR A
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:YCOORD4 LSR A
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ROR ZP2+0
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LSR A
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ROR ZP2+0
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@ -92,15 +246,3 @@ RELCOORD CLC
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STA VDUQ+7
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RTS
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@ -177,7 +177,7 @@ BYTE00XX BEQ BYTE00A ; OSBYTE 0,0 - generate error
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RTS ; %000x1xxx host type, 'A'pple
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BYTE00A BRK
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DB $F7
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HELLO ASC 'Applecorn MOS 2021-09-24'
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HELLO ASC 'Applecorn MOS 2021-09-26'
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DB $00 ; Unify MOS messages
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803
auxmem.vdu.s
803
auxmem.vdu.s
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@ -13,6 +13,9 @@
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* 09-Sep-2021 New dispatch routine.
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* 22-Sep-2021 More VDU workspace, started MODE definitions.
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* 23-Sep-2021 More or less sorted VDU workspace.
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* 26-Sep-2021 Merged together JGH VDU updates and Bobbi GFX updates.
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* Moved all graphics screen access code to gfx.s
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* All 65816-specific code disabled.
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**********************************
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@ -33,82 +36,92 @@ VDUSTATUS EQU $D0 ; $D0 # VDU status
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* bit 1 = Don't scroll (COPY cursor or VDU 5 mode)
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* bit 0 = VDU 2 printer echo active
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*
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VDUCHAR EQU VDUSTATUS+1 ; $D1
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VDUADDR EQU VDUSTATUS+4 ; $D4 address of current char cell
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OLDCHAR EQU OSKBD1 ; *TEMP* character under cursor
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COPYCHAR EQU OSKBD2 ; *TEMP* character under copy cursor
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VDUCHAR EQU VDUSTATUS+1 ; $D1 current control character
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VDUTEMP EQU VDUCHAR ; &D1
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VDUADDR EQU VDUSTATUS+2 ; $D2 address of current char cell
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VDUBANK EQU VDUADDR+2 ; $D4 screen bank
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VDUADDR2 EQU VDUADDR+3 ; $D5 address being scrolled
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VDUBANK2 EQU VDUBANK+3 ; $D7 screen bank being scrolled
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*
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OLDCHAR EQU OSKBD1 ; &EC character under cursor
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COPYCHAR EQU OSKBD2 ; &ED character under copy cursor
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* VDU DRIVER MAIN WORKSPACE
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***************************
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FXLINES EQU BYTEVARBASE+217 ; Paged scrolling line counter
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FXVDUQLEN EQU BYTEVARBASE+218 ; Length of pending VDU queue
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FXLINES EQU BYTEVARBASE+217 ; Paged scrolling line counter
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FXVDUQLEN EQU BYTEVARBASE+218 ; Length of pending VDU queue
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VDUVARS EQU $290
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VDUVAREND EQU $2ED
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GFXWINLFT EQU VDUVARS+$00 ; # graphics window left
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GFXWINBOT EQU VDUVARS+$02 ; # graphics window bottom \ window
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GFXWINRGT EQU VDUVARS+$04 ; # graphics window right / size
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GFXWINTOP EQU VDUVARS+$06 ; # graphics window top
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TXTWINLFT EQU VDUVARS+$08 ; # text window left
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TXTWINBOT EQU VDUVARS+$09 ; # text window bottom \ window
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TXTWINRGT EQU VDUVARS+$0A ; # text window right / size
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TXTWINTOP EQU VDUVARS+$0B ; # text window top
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GFXORIGX EQU VDUVARS+$0C ; graphics X origin
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GFXORIGY EQU VDUVARS+$0E ; graphics Y origin
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GFXWINLFT EQU VDUVARS+$00 ; # graphics window left
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GFXWINBOT EQU VDUVARS+$02 ; # graphics window bottom \ window
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GFXWINRGT EQU VDUVARS+$04 ; # graphics window right / size
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GFXWINTOP EQU VDUVARS+$06 ; # graphics window top
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TXTWINLFT EQU VDUVARS+$08 ; # text window left
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TXTWINBOT EQU VDUVARS+$09 ; # text window bottom \ window
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TXTWINRGT EQU VDUVARS+$0A ; # text window right / size
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TXTWINTOP EQU VDUVARS+$0B ; # text window top
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GFXORIGX EQU VDUVARS+$0C ; graphics X origin
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GFXORIGY EQU VDUVARS+$0E ; graphics Y origin
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*
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GFXPOSNX EQU VDUVARS+$10 ; current graphics X posn
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GFXPOSNY EQU VDUVARS+$12 ; current graphics Y posn
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GFXLASTX EQU VDUVARS+$14 ; last graphics X posn
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GFXLASTY EQU VDUVARS+$16 ; last graphics Y posn
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VDUTEXTX EQU VDUVARS+$18 ; # absolute text X posn = POS+WINLFT
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VDUTEXTY EQU VDUVARS+$19 ; # absolute text Y posn = VPOS+WINTOP
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VDUCOPYX EQU VDUVARS+$1A ; absolute COPY text X posn
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VDUCOPYY EQU VDUVARS+$1B ; absolute COPY text Y posn
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GFXPOSNX EQU VDUVARS+$10 ; current graphics X posn
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GFXPOSNY EQU VDUVARS+$12 ; current graphics Y posn
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GFXLASTX EQU VDUVARS+$14 ; last graphics X posn
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GFXLASTY EQU VDUVARS+$16 ; last graphics Y posn
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VDUTEXTX EQU VDUVARS+$18 ; # absolute text X posn = POS+WINLFT
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VDUTEXTY EQU VDUVARS+$19 ; # absolute text Y posn = VPOS+WINTOP
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VDUCOPYX EQU VDUVARS+$1A ; absolute COPY text X posn
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VDUCOPYY EQU VDUVARS+$1B ; absolute COPY text Y posn
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*
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PIXELPLOTX EQU VDUVARS+$1C ; PLOT graphics X in pixels
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PIXELPLOTY EQU VDUVARS+$1E ; PLOT graphics Y in pixels
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PIXELPOSNX EQU VDUVARS+$20 ; current graphics X in pixels
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PIXELPOSNY EQU VDUVARS+$22 ; current graphics Y in pixels
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PIXELLASTX EQU VDUVARS+$24 ; last graphics X in pixels
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PIXELLASTY EQU VDUVARS+$26 ; last graphics Y in pixels
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PIXELPLOTX EQU VDUVARS+$1C ; PLOT graphics X in pixels
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PIXELPLOTY EQU VDUVARS+$1E ; PLOT graphics Y in pixels
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PIXELPOSNX EQU VDUVARS+$20 ; current graphics X in pixels
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PIXELPOSNY EQU VDUVARS+$22 ; current graphics Y in pixels
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PIXELLASTX EQU VDUVARS+$24 ; last graphics X in pixels
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PIXELLASTY EQU VDUVARS+$26 ; last graphics Y in pixels
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VDUWINEND EQU VDUVARS+$27 ; VDU 26 clears up to here
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*
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CURSOR EQU VDUVARS+$28 ; character used for cursor
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CURSORED EQU VDUVARS+$29 ; character used for edit cursor
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CURSORCP EQU VDUVARS+$2A ; character used for copy cursor
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CURSOR EQU VDUVARS+$28 ; character used for cursor
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CURSORCP EQU VDUVARS+$29 ; character used for copy cursor
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CURSORED EQU VDUVARS+$2A ; character used for edit cursor
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*
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VDUQ EQU VDUVARS+$2B ; $2B..$33
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VDUQLAST EQU VDUQ+1 ; Neatly becomes VDUVARS+$2C
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VDUQPLOT EQU VDUQ+5 ; Neatly becomes VDUVARS+$30
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VDUQ EQU VDUVARS+$2B ; $2B..$33
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VDUQLAST EQU VDUQ+1 ; Neatly becomes VDUVARS+$2C
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VDUQPLOT EQU VDUQ+5 ; Neatly becomes VDUVARS+$30
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*
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VDUBORDER EQU VDUVARS+$34 ; Border colour
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VDUMODE EQU VDUVARS+$35 ; # current MODE
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VDUSCREEN EQU VDUVARS+$36 ; # MODE type
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TXTFGD EQU VDUVARS+$37 ; # Text foreground
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TXTBGD EQU VDUVARS+$38 ; # Text background
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GFXFGD EQU VDUVARS+$39 ; # Graphics foreground
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GFXBGD EQU VDUVARS+$3A ; # Graphics background
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GFXPLOTFGD EQU VDUVARS+$3B ; # Foreground GCOL action
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GFXPLOTBGD EQU VDUVARS+$3C ; # Background GCOL action
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VDUBORDER EQU VDUVARS+$34 ; Border colour
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VDUMODE EQU VDUVARS+$35 ; # current MODE
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VDUSCREEN EQU VDUVARS+$36 ; # MODE type
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TXTFGD EQU VDUVARS+$37 ; # Text foreground
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TXTBGD EQU VDUVARS+$38 ; # Text background
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GFXFGD EQU VDUVARS+$39 ; # Graphics foreground
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GFXBGD EQU VDUVARS+$3A ; # Graphics background
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GFXPLOTFGD EQU VDUVARS+$3B ; # Foreground GCOL action
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GFXPLOTBGD EQU VDUVARS+$3C ; # Background GCOL action
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VDUVAR3D EQU VDUVARS+$3D
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VDUVAR3E EQU VDUVARS+$3E
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VDUBYTES EQU VDUVARS+$3F ; # bytes per char, 1=text only
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VDUCOLOURS EQU VDUVARS+$40 ; # colours-1
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VDUPIXELS EQU VDUVARS+$41 ; # pixels per byte
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VDUWORKSP EQU VDUVARS+$42 ; 28 bytes of general workspace
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VDUBYTES EQU VDUVARS+$3F ; bytes per char, 1=text only
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VDUCOLOURS EQU VDUVARS+$40 ; # colours-1
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VDUPIXELS EQU VDUVARS+$41 ; # pixels per byte
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VDUWORKSP EQU VDUVARS+$42 ; 28 bytes of general workspace
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VDUWORKSZ EQU VDUVAREND-VDUWORKSP+1
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*
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* Screen definitions
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* 0 1 2 3 4 5 6 7
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SCNTXTMAXX DB 79,39,19,79,39,19,39,39 ; Max text column
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SCNTXTMAXY DB 23,23,23,23,23,23,23,23 ; Max text row
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SCNBYTES DB 1,1,8,1,1,1,1,1
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SCNCOLOURS DB 1,1,8,1,1,1,1,1
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SCNTYPE DB 1,0,128,1,0,0,0,0
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* 1 3 6 7
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SCNTXTMAXX DB 79,39,19,79,39,19,39,39 ; Max text column
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SCNTXTMAXY DB 23,23,23,23,23,23,23,23 ; Max text row
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SCNBYTES DB 1, 8, 1, 1, 1, 1, 1, 1 ; Bytes per character
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SCNCOLOURS DB 15,15,15,15,15,15,15,15 ; Colours-1
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SCNPIXELS DB 0, 7, 0, 0, 0, 0, 0, 0 ; Pixels per byte
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SCNTYPE DB 1,128,0, 1, 0, 0, 0,64 ; Screen type
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* b7=FastDraw
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* b6=Teletext
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* b0=40COL/80COL
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* =
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* Colour table
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CLRTRANS DB 00,01,04,09,02,03,07,10
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DB 05,08,12,13,06,14,11,15
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********************************************************************
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* Note that we use PAGE2 80 column mode ($800-$BFF in main and aux)
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@ -180,7 +193,7 @@ CTRLCHARGO2 PHP ; Save CS=(ctrl>=8 && ctrl<=13)
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RTS ; Return, CC=Don't echo to printer
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OUTCHARGO ASL A ; Entry point to move COPY cursor
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TAY ; (TEMP and scroll screen)
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TAY
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CTRLCHARJMP CPY #6*2
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BEQ CTRLCHAR6 ; Always allow VDU 6 through
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BIT VDUSTATUS
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@ -320,52 +333,43 @@ PRCHRC PHA ; Save character
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:RESUME PLA
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* Put character to screen
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PUTCHRC EOR #$80 ; Convert character
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TAY
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* Puts character to text screen buffer, then in graphics mode,
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* writes bitmap to graphics screen
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PUTCHRC PHA
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EOR #$80 ; Convert character to screen code
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TAX
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AND #$A0
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BNE PRCHR4
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CPY #$20
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BCS PRCHR3 ; Not $80-$9F
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CPX #$20
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BCS PRCHR3 ; Not $80-$9F
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BIT VDUSCREEN
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BVC PRCHR3 ; Not teletext
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LDY #$E0 ; Convert $80-$9F to space
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PRCHR3 TYA
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BVC PRCHR3 ; Not teletext
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LDX #$E0 ; Convert $80-$9F to space
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PRCHR3 TXA
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EOR #$40
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TAY
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PRCHR4 PHY
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JSR CHARADDR ; Find character address
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PLA ; Get character back
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PHA ; Stash it again
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PHP ; Disable IRQs while
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SEI ; toggling memory
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BCC PRCHR6 ; Aux memory
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STA $C004 ; Switch to main memory
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PRCHR6 STA (VDUADDR),Y ; Store it
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STA $C005 ; Back to aux memory
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PLP ; Restore IRQs
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LDY VDUBYTES
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DEY ; If VDUBYTE=1, text mode
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BEQ :DONE
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JSR HCHARADDR ; Addr in VDUADDR
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PHP ; Disable IRQs while
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SEI ; toggling memory
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STA $C004 ; Write to main
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LDA VDUADDR+0
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STA HGRADDR+0
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LDA VDUADDR+1
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STA HGRADDR+1
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STA $C005 ; Write to aux
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PLP ; Restore IRQs
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||||
PLA ; Recover character
|
||||
>>> XF2MAIN,DRAWCHAR ; Plot char on HGR screen
|
||||
:DONE PLA ; Discard character
|
||||
RTS
|
||||
|
||||
PUTCHRET >>> ENTAUX
|
||||
RTS
|
||||
TAX
|
||||
PRCHR4 JSR CHARADDR ; Find character address
|
||||
TXA ; Get character back
|
||||
BIT VDUBANK
|
||||
* BPL PRCHR5 ; Not AppleGS, use short write
|
||||
* DB $97,VDUADDR ; STA [VDUADDR],Y
|
||||
* BRA PRCHR8
|
||||
PRCHR5 PHP ; Disable IRQs while
|
||||
SEI ; toggling memory
|
||||
BCC PRCHR6 ; Aux memory
|
||||
STA $C004 ; Switch to main memory
|
||||
PRCHR6 STA (VDUADDR),Y ; Store it
|
||||
PRCHR7 STA $C005 ; Back to aux memory
|
||||
PLP ; Restore IRQs
|
||||
PRCHR8 PLA
|
||||
BIT VDUSCREEN
|
||||
BPL GETCHROK
|
||||
JMP PRCHRSOFT ; Write character to graphics
|
||||
|
||||
* OSBYTE &87 - Read character at cursor
|
||||
***************************************
|
||||
* Fetch character from screen at (TEXTX,TEXTY) and return MODE in Y
|
||||
* Always uses text screen (which we maintain even in graphics mode)
|
||||
* Always read from text screen (which we maintain even in graphics mode)
|
||||
BYTE87
|
||||
GETCHRC JSR CHARADDR ; Find character address
|
||||
PHP ; Disable IRQs while
|
||||
|
|
@ -387,45 +391,53 @@ GETCHR7 TYA
|
|||
TAX ; X=char
|
||||
GETCHROK RTS
|
||||
|
||||
* Get text cursor position
|
||||
BYTE86 LDY VDUTEXTY ; ROW ; $86 = read cursor pos
|
||||
LDX VDUTEXTX ; COL
|
||||
|
||||
* OSBYTE &86 - Get text cursor position
|
||||
***************************************
|
||||
BYTE86 LDY VDUTEXTY
|
||||
LDX VDUTEXTX
|
||||
RTS
|
||||
|
||||
* Calculate character address
|
||||
* NB: VDUBANK at VDUADDR+2 is set by VDU22
|
||||
CHARADDR LDA VDUTEXTY
|
||||
ASL
|
||||
TAX
|
||||
LDA SCNTAB+0,X ; LSB of row address
|
||||
CHARADDRY ASL
|
||||
TAY
|
||||
LDA SCNTAB+0,Y ; LSB of row address
|
||||
STA VDUADDR+0
|
||||
LDA SCNTAB+1,X ; MSB of row address
|
||||
LDA SCNTAB+1,Y ; MSB of row address
|
||||
STA VDUADDR+1
|
||||
LDA VDUTEXTX
|
||||
BIT $C01F
|
||||
SEC
|
||||
BPL CHARADDR40 ; 40-col
|
||||
BPL CHARADDR40 ; 40-col
|
||||
LSR A
|
||||
CHARADDR40 TAY ; Y=offset into this row
|
||||
CHARADDR40 TAY ; Y=offset into this row
|
||||
LDA VDUBANK
|
||||
AND #$FE
|
||||
BCS CHARADDROK
|
||||
ORA #$01
|
||||
CHARADDROK STA VDUBANK
|
||||
RTS
|
||||
* (VDUADDR),Y=>character address
|
||||
* CC=auxmem
|
||||
* CS=mainmem
|
||||
* VDUBANK = AppleGS screen bank
|
||||
* CC=auxmem, CS=mainmem, X=preserved
|
||||
|
||||
* Calculate character address in HGR mode
|
||||
* Calculate character address in HGR screen memory
|
||||
* This is the address of the first pixel row of the char
|
||||
* Add $0400 for each subsequent row of the char
|
||||
HCHARADDR LDA VDUTEXTY
|
||||
ASL
|
||||
TAX
|
||||
TAY
|
||||
CLC
|
||||
LDA HGRTAB+0,X ; LSB of row address
|
||||
LDA HGRTAB+0,Y ; LSB of row address
|
||||
ADC VDUTEXTX
|
||||
STA VDUADDR+0
|
||||
LDA HGRTAB+1,X ; MSB of row address
|
||||
LDA HGRTAB+1,Y ; MSB of row address
|
||||
ADC #$00
|
||||
STA VDUADDR+1
|
||||
RTS
|
||||
* (VDUADDR)=>character address
|
||||
* (VDUADDR)=>character address, X=preserved
|
||||
|
||||
* Move cursor left
|
||||
VDU08 LDA VDUTEXTX ; COL
|
||||
|
|
@ -504,307 +516,28 @@ VDU31 LDY VDUQ+8
|
|||
|
||||
|
||||
* VDU 26 - Reset to default windows
|
||||
VDU26 LDX VDUMODE
|
||||
VDU26A LDA SCNTXTMAXX,X
|
||||
STA TXTWINRGT
|
||||
LDA SCNTXTMAXY,X
|
||||
STA TXTWINBOT
|
||||
VDU26 LDA #$F7
|
||||
JSR CLRSTATUS ; Clear 'soft window'
|
||||
VDU26A LDX #VDUWINEND-VDUVARS
|
||||
LDA #$00
|
||||
VDU26LP STA VDUVARS,X ; Clear all windows
|
||||
DEX ; and all coords
|
||||
BPL VDU26LP ; and origin, etc.
|
||||
LDY VDUMODE
|
||||
LDA SCNTXTMAXY,Y
|
||||
STA TXTWINBOT ; Text window height
|
||||
STA GFXWINTOP ; Graphics height
|
||||
LDX #GFXWINTOP-VDUVARS
|
||||
LDA SCNTXTMAXX,Y
|
||||
STA TXTWINRGT ; Text window width
|
||||
STA GFXWINRGT ; Graphics width
|
||||
LDX #GFXWINRGT-VDUVARS
|
||||
* TO DO *
|
||||
RTS
|
||||
|
||||
|
||||
|
||||
* Initialise VDU driver
|
||||
***********************
|
||||
* On entry, A=MODE to start in
|
||||
*
|
||||
VDUINIT STA VDUQ+8
|
||||
|
||||
* VDU 22 - MODE n
|
||||
*****************
|
||||
* At the moment only MODEs available:
|
||||
* MODE 3 - 80x24 text
|
||||
* MODE 6 - 40x24 text
|
||||
* MODE 7 - 40x24 with $80-$9F converted to spaces
|
||||
* MODE 2 - 280x192 HGR graphics, 40 cols bitmap text
|
||||
* MODE 0 defaults to MODE 3
|
||||
* All others default to MODE 6
|
||||
*
|
||||
VDU22 LDA VDUQ+8
|
||||
AND #$07
|
||||
STA VDUMODE
|
||||
TAX ; Set up MODE
|
||||
LDA #'_' ; Set up default cursors
|
||||
STA CURSOR ; Normal cursor
|
||||
STA CURSORCP ; Copy cursor when editing
|
||||
LDA #$A0
|
||||
STA CURSORED ; Edit cursor when editing
|
||||
LDA #$01
|
||||
JSR CLRSTATUS ; Clear everything except PrinterEcho
|
||||
JSR VDU26A
|
||||
*
|
||||
LDA SCNBYTES,X
|
||||
STA VDUBYTES
|
||||
LDA SCNCOLOURS,X
|
||||
STA VDUCOLOURS
|
||||
LDA SCNTYPE,X
|
||||
STA VDUSCREEN
|
||||
BMI VDU22G ; b7=1, graphics mode
|
||||
* TEMP
|
||||
CPX #2
|
||||
BEQ VDU22G ; Jump out for MODE 1
|
||||
* TEMP
|
||||
*
|
||||
AND #$01 ; 40col/80col bit
|
||||
TAX
|
||||
STA $C00C,X ; Select 40col/80col
|
||||
STA $C051 ; Enable Text
|
||||
STA $C055 ; PAGE2
|
||||
STA $C052 ; Clear MIXED
|
||||
STA $C00F ; Enable alt charset
|
||||
BRA VDU22CLR
|
||||
|
||||
|
||||
VDU22G STA $C050 ; Enable Graphics
|
||||
STA $C057 ; Hi-Res
|
||||
STA $C054 ; PAGE1
|
||||
STA $C052 ; Clear MIXED
|
||||
STA $C00C ; Select 40col text
|
||||
JMP VDU16 ; Clear HGR screen
|
||||
|
||||
VDU22CLR
|
||||
* JSR VDU15 ; Turn off paged scrolling
|
||||
* JSR VDU20 ; Reset colours
|
||||
* JSR VDU26 ; Reset windows
|
||||
* ; Drop through into VDU12, clear screen
|
||||
|
||||
|
||||
VDU12 LDY VDUBYTES
|
||||
DEY ; If VDUBYTE=1, text mode
|
||||
BNE VDU12SOFT ; Graphics mode
|
||||
JMP CLEAR
|
||||
|
||||
* Clear the screen
|
||||
CLEAR STZ VDUTEXTY ; ROW
|
||||
STZ VDUTEXTX ; COL
|
||||
:L1 JSR CLRLINE
|
||||
:S2 LDA VDUTEXTY ; ROW
|
||||
CMP #23
|
||||
BEQ :S3
|
||||
INC VDUTEXTY ; ROW
|
||||
BRA :L1
|
||||
:S3 STZ VDUTEXTY ; ROW
|
||||
STZ VDUTEXTX ; COL
|
||||
RTS
|
||||
VDU12SOFT JMP VDU16 ; *TEMP*
|
||||
|
||||
|
||||
* Clear screen line
|
||||
CLRLINE LDA VDUTEXTY ; ROW
|
||||
ASL
|
||||
TAX
|
||||
LDA SCNTAB,X ; LSB of row
|
||||
STA ZP1
|
||||
LDA SCNTAB+1,X ; MSB of row
|
||||
STA ZP1+1
|
||||
LDA VDUTEXTX ; COL
|
||||
PHA
|
||||
STZ VDUTEXTX ; COL
|
||||
:L1 LDA VDUTEXTX ; COL
|
||||
LSR
|
||||
TAY
|
||||
BCC :S1
|
||||
>>> WRTMAIN
|
||||
:S1 LDA #" "
|
||||
STA (ZP1),Y
|
||||
>>> WRTAUX
|
||||
LDA VDUTEXTX ; COL
|
||||
CMP #79
|
||||
BEQ :S2
|
||||
INC VDUTEXTX ; COL
|
||||
BRA :L1
|
||||
:S2 PLA
|
||||
STA VDUTEXTX ; COL
|
||||
LDY VDUBYTES
|
||||
DEY ; If VDUBYTE=1, text mode
|
||||
BEQ :DONE
|
||||
LDA VDUTEXTY
|
||||
ASL
|
||||
TAX
|
||||
>>> WRTMAIN
|
||||
LDA HGRTAB+0,X
|
||||
STA HGRADDR+0
|
||||
LDA HGRTAB+1,X
|
||||
STA HGRADDR+1
|
||||
>>> WRTAUX
|
||||
>>> XF2MAIN,HCLRLINE
|
||||
:DONE RTS
|
||||
|
||||
CLRLNRET >>> ENTAUX
|
||||
RTS
|
||||
|
||||
* Scroll whole screen one line
|
||||
SCROLLER LDA #$00
|
||||
:L1 PHA
|
||||
JSR SCR1LINE ; Scroll text screen 1 line
|
||||
PLA
|
||||
LDY VDUBYTES
|
||||
DEY ; If VDUBYTE=1, text mode
|
||||
BEQ :TEXTONLY ; Text mode, skip HGR scroll
|
||||
PHA
|
||||
JSR HSCR1LINE ; Scroll HGR screen 1 text line
|
||||
PLA
|
||||
:TEXTONLY INC
|
||||
CMP #23
|
||||
BNE :L1
|
||||
BIT VDUSTATUS
|
||||
BVC :L2 ; Copy cursor not active
|
||||
JSR COPYSWAP1
|
||||
LDA #11
|
||||
JSR OUTCHARGO
|
||||
JSR COPYSWAP1
|
||||
:L2 RTS
|
||||
|
||||
* Copy line A+1 to line A
|
||||
SCR1LINE ASL ; Dest addr->ZP1
|
||||
TAX
|
||||
LDA SCNTAB,X
|
||||
STA ZP1
|
||||
LDA SCNTAB+1,X
|
||||
STA ZP1+1
|
||||
INX ; Source addr->ZP2
|
||||
INX
|
||||
LDA SCNTAB,X
|
||||
STA ZP2
|
||||
LDA SCNTAB+1,X
|
||||
STA ZP2+1
|
||||
LDY #$00
|
||||
:L1 LDA (ZP2),Y
|
||||
STA (ZP1),Y
|
||||
STA $C002 ; Read main mem
|
||||
>>> WRTMAIN
|
||||
LDA (ZP2),Y
|
||||
STA (ZP1),Y
|
||||
STA $C003 ; Read aux mem
|
||||
>>> WRTAUX
|
||||
INY
|
||||
CPY #40
|
||||
BNE :L1
|
||||
RTS
|
||||
|
||||
* Copy text line A+1 to line A for HGR bitmap gfx mode
|
||||
HSCR1LINE >>> XF2MAIN,HGRSCR1L
|
||||
HSCR1RET >>> ENTAUX
|
||||
RTS
|
||||
|
||||
* VDU 1 - Send one character to printer
|
||||
VDU01 RTS
|
||||
|
||||
* VDU 16 - CLG, clear graphics window
|
||||
VDU16 >>> XF2MAIN,CLRHGR
|
||||
VDU16RET >>> ENTAUX
|
||||
STZ XPIXEL+0
|
||||
STZ XPIXEL+1
|
||||
LDA #191
|
||||
STA YPIXEL
|
||||
RTS
|
||||
|
||||
* VDU 17 - COLOUR n - select text or border colour
|
||||
VDU17 RTS
|
||||
|
||||
* VDU 18 - GCOL k,a - select graphics colour and plot action
|
||||
VDU18 LDA VDUQ+7 ; Argument 'k'
|
||||
CMP #$04 ; k=4 means XOR
|
||||
LDA #$00 ; Normal drawing mode
|
||||
BNE :NORM
|
||||
LDA #$01 ; XOR mode
|
||||
:NORM >>> WRTMAIN
|
||||
STA LINETYPE
|
||||
STA FDRAWADDR+5
|
||||
>>> WRTAUX
|
||||
>>> XF2MAIN,SETLINE
|
||||
VDU18RET1 >>> ENTAUX
|
||||
:NORM LDA VDUQ+8 ; Argument 'a'
|
||||
BPL :FOREGND ; <128 is foreground
|
||||
>>> WRTMAIN
|
||||
STA BGCOLOR ; Stored in main memory
|
||||
>>> WRTAUX
|
||||
RTS
|
||||
:FOREGND >>> WRTMAIN
|
||||
STA FGCOLOR ; Stored in main memory
|
||||
>>> WRTAUX
|
||||
RTS
|
||||
|
||||
* VDU 19 - Select palette colours
|
||||
VDU19 RTS
|
||||
|
||||
* VDU 20 - Reset to default colours
|
||||
VDU20 RTS
|
||||
|
||||
* VDU 23 - Program video system and define characters
|
||||
VDU23 RTS
|
||||
|
||||
* VDU 24,left;bottom;right;top; - define graphics window
|
||||
VDU24 RTS
|
||||
|
||||
* VDU 25,k,x;y; - PLOT k,x;y; - PLOT point, line, etc.
|
||||
* x is in VDUQ+7,VDUQ+8
|
||||
* y is in VDUQ+5,VDUQ+6
|
||||
* k is in VDUQ+4
|
||||
VDU25 JSR CVTCOORD ; Convert coordinate system
|
||||
LDA VDUQ+4
|
||||
AND #$04 ; Bit 2 set -> absolute
|
||||
BNE :ABS
|
||||
JSR RELCOORD ; Add coords to XPIXEL/YPIXEL
|
||||
:ABS LDA VDUQ+4
|
||||
AND #$03
|
||||
CMP #$0 ; Bits 0,1 clear -> just move
|
||||
BNE :NOTMOVE
|
||||
JMP HGRPOS ; Just update pos
|
||||
:NOTMOVE LDA VDUQ+4
|
||||
AND #$C0
|
||||
CMP #$40 ; Bit 7 clr, bit 6 set -> point
|
||||
BNE :LINE
|
||||
>>> WRTMAIN
|
||||
LDA VDUQ+4
|
||||
STA PLOTMODE
|
||||
LDA VDUQ+5
|
||||
STA FDRAWADDR+6 ; LSB of X1
|
||||
LDA VDUQ+6
|
||||
STA FDRAWADDR+7 ; MSB of X1
|
||||
LDA VDUQ+7
|
||||
STA FDRAWADDR+8 ; Y1
|
||||
>>> WRTAUX
|
||||
>>> XF2MAIN,DRAWPNT
|
||||
:LINE >>> WRTMAIN
|
||||
LDA VDUQ+4
|
||||
STA PLOTMODE
|
||||
LDA XPIXEL+0
|
||||
STA FDRAWADDR+6
|
||||
LDA XPIXEL+1
|
||||
STA FDRAWADDR+7
|
||||
LDA YPIXEL
|
||||
STA FDRAWADDR+8
|
||||
LDA VDUQ+5
|
||||
STA FDRAWADDR+9 ; LSB of X1
|
||||
LDA VDUQ+6
|
||||
STA FDRAWADDR+10 ; MSB of X1
|
||||
LDA VDUQ+7
|
||||
STA FDRAWADDR+11 ; Y1
|
||||
>>> WRTAUX
|
||||
>>> XF2MAIN,DRAWLINE
|
||||
VDU25RET >>> ENTAUX
|
||||
* Fall through into HGRPOS
|
||||
* Save pixel X,Y position
|
||||
HGRPOS LDA VDUQ+5
|
||||
STA XPIXEL+0
|
||||
LDA VDUQ+6
|
||||
STA XPIXEL+1
|
||||
LDA VDUQ+7
|
||||
STA YPIXEL
|
||||
RTS
|
||||
XPIXEL DW $0000 ; Previous plot x-coord
|
||||
YPIXEL DB $00 ; Previous plot y-coord
|
||||
|
||||
* VDU 28,left,bottom,right,top - define text window
|
||||
VDU28 RTS
|
||||
|
||||
|
|
@ -812,6 +545,248 @@ VDU28 RTS
|
|||
VDU29 RTS
|
||||
|
||||
|
||||
* Initialise VDU driver
|
||||
***********************
|
||||
* On entry, A=MODE to start in
|
||||
*
|
||||
VDUINIT STA VDUQ+8
|
||||
* JSR FONTIMPLODE ; Reset VDU 23 font
|
||||
|
||||
* VDU 22 - MODE n
|
||||
*****************
|
||||
* At the moment only MODEs available:
|
||||
* MODE 1 - 280x192 HGR graphics, 40 cols bitmap text
|
||||
* MODE 3 - 80x24 text
|
||||
* MODE 6 - 40x24 text
|
||||
* MODE 7 - 40x24 with $80-$9F converted to spaces
|
||||
* MODE 0 defaults to MODE 3
|
||||
* All others default to MODE 6
|
||||
*
|
||||
* Wait for VSync?
|
||||
VDU22 LDA VDUQ+8
|
||||
AND #$07
|
||||
TAX ; Set up MODE
|
||||
STX VDUMODE ; Screen MODE
|
||||
LDA SCNCOLOURS,X
|
||||
STA VDUCOLOURS ; Colours-1
|
||||
LDA SCNBYTES,X
|
||||
STA VDUBYTES ; Bytes per char
|
||||
LDA SCNPIXELS,X
|
||||
STA VDUPIXELS ; Pixels per byte
|
||||
LDA SCNTYPE,X
|
||||
STA VDUSCREEN ; Screen type
|
||||
JSR NEGCALL ; Find machine type
|
||||
AND #$0F
|
||||
BEQ :MODEGS ; MCHID=$x0 -> Not AppleGS, bank=0
|
||||
LDA #$E0 ; Not $x0 -> AppleGS, point to screen bank
|
||||
:MODEGS STA VDUBANK
|
||||
LDA #$01
|
||||
JSR CLRSTATUS ; Clear everything except PrinterEcho
|
||||
LDA #'_' ; Set up default cursors
|
||||
STA CURSOR ; Normal cursor
|
||||
STA CURSORCP ; Copy cursor when editing
|
||||
LDA #$A0
|
||||
STA CURSORED ; Edit cursor when editing
|
||||
JSR VDU20 ; Default colours
|
||||
JSR VDU26 ; Default windows
|
||||
STA $C052 ; Clear MIXED
|
||||
LDA VDUSCREEN
|
||||
BMI VDU22G ; b7=1, graphics mode
|
||||
AND #$01 ; 40col/80col bit
|
||||
TAX
|
||||
STA $C00C,X ; Select 40col/80col
|
||||
STA $C051 ; Enable Text
|
||||
STA $C055 ; PAGE2
|
||||
STA $C00F ; Enable alt charset
|
||||
* Fall through into CLS
|
||||
|
||||
VDU12 STZ FXLINES
|
||||
STZ VDUTEXTX
|
||||
STZ VDUTEXTY
|
||||
|
||||
* Clear the text screen buffer
|
||||
:L1 JSR CLREOL
|
||||
:S2 LDA VDUTEXTY ; ROW
|
||||
CMP #23
|
||||
BEQ :S3
|
||||
INC VDUTEXTY ; ROW
|
||||
BRA :L1
|
||||
:S3 STZ VDUTEXTY ; ROW
|
||||
STZ VDUTEXTX ; COL
|
||||
BIT VDUSCREEN
|
||||
BMI VDU12SOFT ; Graphics mode
|
||||
RTS
|
||||
* Clear the graphics screen buffer
|
||||
VDU12SOFT JMP VDU16 ; *TEMP*
|
||||
|
||||
VDU22G STA $C050 ; Enable Graphics
|
||||
STA $C057 ; Hi-Res
|
||||
STA $C054 ; PAGE1
|
||||
STA $C00C ; Select 40col text
|
||||
JMP VDU12 ; Clear text and HGR screen
|
||||
|
||||
* Clear to EOL
|
||||
CLRLINE
|
||||
CLREOL JSR CHARADDR ; Set VDUADDR=>start of line
|
||||
* BIT VDUBANK
|
||||
* BMI CLREOLGS ; AppleGS
|
||||
LDY #39
|
||||
LDA #$A0
|
||||
:L1 STA (VDUADDR),Y
|
||||
PHP
|
||||
SEI
|
||||
STA $C004
|
||||
STA (VDUADDR),Y
|
||||
STA $C005
|
||||
PLP
|
||||
DEY
|
||||
BPL :L1
|
||||
BIT VDUSCREEN
|
||||
BPL CLREOLOK
|
||||
JMP HSCRCLREOL ; Clear an HGR line
|
||||
CLREOLOK RTS
|
||||
CLREOLGS LDX #1
|
||||
:L2 LDY #39
|
||||
LDA #$A0
|
||||
:L3 DB $97,VDUADDR ; STA [VDUADDR],Y
|
||||
DEY
|
||||
BPL :L3
|
||||
LDA VDUBANK
|
||||
EOR #$01
|
||||
STA VDUBANK
|
||||
DEX
|
||||
BPL :L2
|
||||
RTS
|
||||
|
||||
* Scroll whole screen one line
|
||||
SCROLLER LDA #$00
|
||||
:L1 PHA
|
||||
JSR SCR1LINE
|
||||
PLA
|
||||
INC
|
||||
CMP #23
|
||||
BNE :L1
|
||||
BIT VDUSTATUS
|
||||
BVC :L2 ; Copy cursor not active
|
||||
JSR COPYSWAP1
|
||||
LDA #11
|
||||
JSR OUTCHARGO
|
||||
JSR COPYSWAP1
|
||||
:L2 RTS
|
||||
|
||||
* Copy line A+1 to line A
|
||||
SCR1LINE PHA
|
||||
JSR CHARADDRY ; VDUADDR=>line A
|
||||
LDX #2
|
||||
:L1 LDA VDUADDR,X ; Copy to VDUADDR2
|
||||
STA VDUADDR2,X
|
||||
DEX
|
||||
BPL :L1
|
||||
PLA
|
||||
PHA
|
||||
INC A
|
||||
JSR CHARADDRY ; VDUADDR=>line A+1
|
||||
* BIT VDUBANK
|
||||
* BMI SCROLLGS
|
||||
LDY #39
|
||||
:L2 LDA (VDUADDR),Y
|
||||
STA (VDUADDR2),Y
|
||||
PHP
|
||||
SEI
|
||||
STA $C002 ; Read main mem
|
||||
STA $C004 ; Write main mem
|
||||
LDA (VDUADDR),Y
|
||||
STA (VDUADDR2),Y
|
||||
STA $C003 ; Read aux mem
|
||||
STA $C005 ; Write aux mem
|
||||
PLP
|
||||
DEY
|
||||
BPL :L2
|
||||
PLA
|
||||
BIT VDUSCREEN ; Also screen graphics screen
|
||||
BMI SCR1SOFT
|
||||
RTS
|
||||
SCROLLGS LDX #1
|
||||
:L4 LDY #39
|
||||
:L5 DB $B7,VDUADDR ; LDA [VDUADDR],Y
|
||||
DB $97,VDUADDR2 ; STA [VDUADDR2],Y
|
||||
DEY
|
||||
BPL :L5
|
||||
LDA VDUBANK
|
||||
EOR #$01
|
||||
STA VDUBANK
|
||||
STA VDUBANK2
|
||||
DEX
|
||||
BPL :L4
|
||||
PLA
|
||||
BIT VDUSCREEN ; Also screen graphics screen
|
||||
BMI SCR1SOFT
|
||||
RTS
|
||||
|
||||
* Copy text line A+1 to line A for HGR bitmap gfx mode
|
||||
SCR1SOFT JMP HSCR1LINE
|
||||
|
||||
* VDU 16 - CLG, clear graphics window
|
||||
VDU16 JMP HSCRCLEAR
|
||||
|
||||
* VDU 20 - Reset to default colours
|
||||
VDU20 LDA #$00 ; *TEMP*
|
||||
STA $C034
|
||||
LDA #$F0
|
||||
STA $C022
|
||||
LDA #$00
|
||||
LDX #$07
|
||||
JSR HSCRSETGCOL
|
||||
LDA #$00
|
||||
LDX #$80
|
||||
JSR HSCRSETGCOL
|
||||
RTS
|
||||
|
||||
* VDU 17 - COLOUR n - select text or border colour
|
||||
VDU17 LDA VDUQ+8 ; *TEMP*
|
||||
JSR HSCRSETTCOL
|
||||
* TO DO: set local VDU variables
|
||||
AND #15
|
||||
TAY
|
||||
LDX CLRTRANS,Y
|
||||
BIT VDUQ+8
|
||||
BPL VDU17FGD
|
||||
BVC VDU17BGD
|
||||
STX $C034
|
||||
RTS
|
||||
VDU17BGD LDA $C022
|
||||
AND #$F0
|
||||
STA $C022
|
||||
TXA
|
||||
ORA $C022
|
||||
STA $C022
|
||||
VDU17FGD RTS
|
||||
|
||||
* VDU 18 - GCOL k,a - select graphics colour and plot action
|
||||
VDU18 LDA VDUQ+7 ; GCOL action
|
||||
LDX VDUQ+8 ; GCOL colour
|
||||
* TO DO: set local VDU variables
|
||||
JSR HSCRSETGCOL
|
||||
RTS
|
||||
|
||||
* VDU 19 - Select palette colours
|
||||
VDU19 RTS
|
||||
|
||||
* VDU 23 - Program video system and define characters
|
||||
VDU23 RTS
|
||||
|
||||
* VDU 25,k,x;y; - PLOT k,x,y - PLOT point, line, etc.
|
||||
* k is in VDUQ+4
|
||||
* x is in VDUQ+5,VDUQ+6
|
||||
* y is in VDUQ+7,VDUQ+8
|
||||
VDU25 JMP HGRPLOT
|
||||
* TO DO:
|
||||
* coord=coord+origin
|
||||
* scale coord
|
||||
* call HGRPLOT
|
||||
* copy this->last, coord->this
|
||||
* check for Escape
|
||||
|
||||
|
||||
|
||||
* OSBYTE &A0 - Read VDU variable
|
||||
|
|
@ -827,10 +802,8 @@ BYTEA02 LDY VDUVARS+1,X
|
|||
RTS
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
* PRINTER DRIVER
|
||||
****************
|
||||
* VDU 1 - Send one character to printer
|
||||
VDU01 RTS
|
||||
|
||||
|
|
|
|||
|
|
@ -78,7 +78,7 @@ GFXINIT JSR FDRAWADDR+0 ; Initialize FDRAW library
|
|||
* Plot bitmap character on the HGR screen
|
||||
* On entry: char is in A
|
||||
DRAWCHAR >>> ENTMAIN
|
||||
AND #$7F
|
||||
* AND #$7F ; Don't!
|
||||
STA A1L ; A*8 -> A1L,A1H
|
||||
STZ A1H
|
||||
ASL A1L
|
||||
|
|
@ -155,7 +155,8 @@ HCLRLINE >>> ENTMAIN
|
|||
:L1 LDY #$00
|
||||
:L2 STA (A4L),Y
|
||||
INY
|
||||
CPY #$39
|
||||
* CPY #$39
|
||||
CPY #40
|
||||
BNE :L2
|
||||
INC A4H
|
||||
INC A4H
|
||||
|
|
|
|||
Loading…
Reference in New Issue