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Merge JGH PR 'VDU workspace completed'.
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Bobbi Webber-Manners
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121
auxmem.vdu.s
121
auxmem.vdu.s
@ -12,6 +12,7 @@
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* 05-Sep-2021 Starting to prepare VDU workspace.
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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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**********************************
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@ -22,7 +23,7 @@
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* VDU DRIVER ZERO PAGE
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**********************
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* $00D0-$00DF VDU driver zero page workspace
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VDUSTATUS EQU $D0 ; $D0 # VDU status
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VDUSTATUS EQU $D0 ; $D0 # VDU status
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* bit 7 = VDU 21 VDU disabled
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* bit 6 = COPY cursor active
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* bit 5 = VDU 5 Text at graphics cursor
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@ -32,58 +33,78 @@ 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
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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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* 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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VDUVARS EQU $290
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VDUVAREND EQU $2DF
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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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VDUQ EQU VDUVARS+$27 ; *TEMP* $27.$2F
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CURSOR EQU VDUVARS+$30 ; *TEMP* character used for cursor
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CURSORED EQU VDUVARS+$31 ; *TEMP* character used for edit cursor
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CURSORCP EQU VDUVARS+$32 ; *TEMP* character used for copy cursor
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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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*
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VDUPIXELS EQU VDUVARS+$33 ; *TEMP* pixels per byte
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VDUBYTES EQU VDUVARS+$34 ; *TEMP* bytes per char, 1=text only
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VDUMODE EQU VDUVARS+$35 ; *TEMP* current MODE
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VDUSCREEN EQU VDUVARS+$36 ; *TEMP* MODE type
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VDUCOLOURS EQU VDUVARS+$37 ; *TEMP* colours-1
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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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*
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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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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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VDUWORKSZ EQU VDUVAREND-VDUWORKSP+1
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*
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* Screen definitions
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* 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 1,1
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SCNCOLOURS DB 1,1
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SCNTYPE DB 1,0,128,1
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* 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, 1, 1, 1, 1, 1, 1, 1 ; Bytes per character
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SCNCOLOURS DB 1, 1, 1, 1, 1, 1, 1, 1 ; Colours-1
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SCNTYPE DB 1, 0,128,1, 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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@ -339,11 +360,8 @@ GETCHR6 LDA (VDUADDR),Y ; Get character
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TAY
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GETCHR7 TYA
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EOR #$80
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TAX ; X=char for OSBYTE
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LDY #$00
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BIT $C01F
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BMI GETCHROK
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INY ; Y=MODE
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LDY VDUMODE ; Y=MODE
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TAX ; X=char
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GETCHROK RTS
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GETCHRSOFT RTS ; *TODO* Jump to gfx
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@ -496,7 +514,7 @@ VDU22 LDA VDUQ+8
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BMI VDU22G ; b7=1, graphics mode
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* TEMP
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CPX #2
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BEQ VDU22G ; Jump out for MODE 2
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BEQ VDU22G ; Jump out for MODE 2
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* TEMP
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*
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AND #$01 ; 40col/80col bit
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@ -508,7 +526,7 @@ VDU22 LDA VDUQ+8
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STA $C00F ; Enable alt charset
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BRA VDU22CLR
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VDU22G STA $C050 ; Enable Graphics
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STA $C057 ; Hi-Res
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STA $C054 ; PAGE1
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@ -539,7 +557,7 @@ CLEAR STZ VDUTEXTY ; ROW
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:S3 STZ VDUTEXTY ; ROW
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STZ VDUTEXTX ; COL
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RTS
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VDU12SOFT JMP VDU16 ; *TEMP*
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VDU12SOFT JMP VDU16 ; *TEMP*
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* Clear to EOL
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@ -735,7 +753,12 @@ VDU29 RTS
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* OSBYTE &A0 - Read VDU variable
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********************************
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BYTEA0 LDY VDUVARS+1,X
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BYTEA0 CPX #$40 ; Index into VDU variables
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BCC BYTEA02
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TXA
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SBC #$20
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TAX
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BYTEA02 LDY VDUVARS+1,X
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LDA VDUVARS+0,X
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TAX
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RTS
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