mirror of
https://github.com/bobbimanners/Applecorn.git
synced 2024-06-25 15:29:37 +00:00
Merged JGH 'Silly bug in VDU23' PR.
This commit is contained in:
Bobbi Webber-Manners
parent
05a7444fee
commit
2fb7f01e67
BIN
applecorn.po
BIN
applecorn.po
Binary file not shown.
660
auxmem.vdu.s
660
auxmem.vdu.s
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@ -11,6 +11,7 @@
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* 21-Aug-2021 If screen scrolls, copy cursor adjusted.
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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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**********************************
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@ -21,7 +22,7 @@
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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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@ -31,12 +32,10 @@ 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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* TO DO: move these to VDU
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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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@ -44,27 +43,56 @@ COPYCHAR EQU OSKBD2 ; *TEMP* ; character under copy cursor
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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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VDUTWINL EQU VDUVARS+$08 ; # text window left
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VDUTWINB EQU VDUVARS+$09 ; # text window bottom \ window
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VDUTWINR EQU VDUVARS+$0A ; # text window right / size
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VDUTWINT EQU VDUVARS+$0B ; # text window top
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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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VDUPIXELS EQU VDUVARS+$13 ; *TEMP*
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VDUBYTES EQU VDUVARS+$14 ; *TEMP* ; bytes per char
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VDUMODE EQU VDUVARS+$15 ; *TEMP* ; current MODE
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VDUSCREEN EQU VDUVARS+$16 ; *TEMP* ; Screen type, MODE 7?
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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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VDUTEXTX EQU VDUVARS+$18 ; absolute POS
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VDUTEXTY EQU VDUVARS+$19 ; absolute VPOS
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VDUCOPYX EQU VDUVARS+$1A ; absolute COPY cursor X posn
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VDUCOPYY EQU VDUVARS+$1B ; absolute COPY cursor Y posn
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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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*
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CURSOR EQU VDUVARS+$20 ; *TEMP* character used for cursor
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CURSORED EQU VDUVARS+$21 ; *TEMP* character used for edit cursor
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CURSORCP EQU VDUVARS+$22 ; *TEMP* character used for copy cursor
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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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*
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VDUQ EQU VDUVARS+$27 ; *TEMP* $27..$2F
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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, 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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* =
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* Addresses of start of text rows in PAGE2
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SCNTAB DW $800,$880,$900,$980,$A00,$A80,$B00,$B80
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DW $828,$8A8,$928,$9A8,$A28,$AA8,$B28,$BA8
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DW $850,$8D0,$950,$9D0,$A50,$AD0,$B50,$BD0
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* Output character to VDU driver
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@ -83,7 +111,12 @@ OUTCHAR LDX FXVDUQLEN
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BMI OUTCHEXIT ; VDU disabled
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OUTCHARCP JSR PRCHRC ; Store char, checking keypress
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JSR VDU09 ; Move cursor right
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* OSBYTE &75 - Read VDUSTATUS
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*****************************
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BYTE75
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OUTCHEXIT LDA VDUSTATUS
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TAX
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LSR A ; Return Cy=Printer Echo Enabled
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RTS
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@ -110,7 +143,7 @@ CTRLCHARGO ASL A
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BCC CTRLCHARGO2 ; ctrl<$08, don't echo to printer
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EOR #$FF ; ctrl>$0D, don't echo to printer
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CMP #$E5 ; (13*2) EOR 255
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CTRLCHARGO2 PHP
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CTRLCHARGO2 PHP ; Save CS=(ctrl>=8 && ctrl<=13)
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JSR CTRLCHARJMP ; Call routine
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PLP
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BCS OUTCHEXIT ; If echoable, test if printer enabled
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@ -127,7 +160,7 @@ CTRLCHAR6 LDA CTRLADDRS+1,Y
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LDA CTRLADDRS+0,Y
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PHA
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VDU27
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VDU00 RTS ; Enters code with CS=(ctrl>=8 && ctrl<=13)
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VDU00 RTS
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QLEN DB -0,-1,-2,-5,-0,-0,-1,-9 ; 32,1 or 17,18,19,20,21,22,23
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DB -8,-5,-0,-0,-4,-4,-0,-2 ; 24,25,26,27,28,29,30,31
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@ -194,7 +227,6 @@ CLRSTATUS AND VDUSTATUS
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RTS
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* Move editing cursor
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* A=cursor key, CS from caller
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COPYMOVE PHA
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@ -216,23 +248,7 @@ COPYMOVE2 PLA
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ORA #8
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COPYMOVE3 JMP OUTCHARGO ; Move edit cursor
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** Turn editing cursor on/off
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*COPYCURSOR BIT VDUSTATUS
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* BVC COPYSWAP4 ; Copy cursor not active
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* PHP ; Save CS=Turn On, CC=Turn Off
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* JSR COPYSWAP1 ; Swap to edit cursor
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* LDA COPYCHAR ; Prepare to turn edit cursor off
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* PLP
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* BCC COPYCURS2 ; Restore character
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*COPYCURS1 JSR GETCHRC ; Get character under edit cursor
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* STA COPYCHAR
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* LDA #$A0 ; Output edit cursor
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*COPYCURS2 JSR PUTCHRC
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** ; Drop through to swap back
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* Swap between edit and copy cursors
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*COPYSWAP BIT VDUSTATUS
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* BVC COPYSWAP4 ; Edit cursor off
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COPYSWAP1 CLC ; CC=Swap TEXT and COPY
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COPYSWAP2 LDX #1
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COPYSWAPLP LDY VDUCOPYX,X
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@ -246,6 +262,286 @@ COPYSWAP3 DEX
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COPYSWAP4 RTS
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* Perform backspace & delete operation
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VDU127 JSR VDU08 ; Move cursor back
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LDA #' ' ; Overwrite with a space
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BNE PUTCHRC
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* Display character at current (TEXTX,TEXTY)
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PRCHRC PHA ; Save character
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LDA $C000
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BPL :RESUME ; No key pressed
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EOR #$80
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:PAUSE1 JSR KBDCHKESC ; Ask KBD to test if Escape
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BIT ESCFLAG
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BMI :RESUMEACK ; Escape, skip pausing
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CMP #$13
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BNE :RESUME ; Not Ctrl-S
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STA $C010 ; Ack. keypress
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:PAUSE2 LDA $C000
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BPL :PAUSE2 ; Loop until keypress
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EOR #$80
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CMP #$11 ; Ctrl-Q
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BEQ :RESUMEACK ; Stop pausing
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JSR KBDCHKESC ; Ask KBD to test if Escape
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BIT ESCFLAG
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BPL :PAUSE2 ; No Escape, keep pausing
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:RESUMEACK STA $C010 ; Ack. keypress
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:RESUME PLA
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* Put character to screen
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PUTCHRC LDY VDUBYTES
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DEY ; If VDUBYTE=1, text mode
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BNE PRCHRSOFT ; Graphics mode
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EOR #$80 ; Convert character
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TAY
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AND #$A0
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BNE PRCHR4
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CPY #$20
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BCS PRCHR3 ; Not $80-$9F
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BIT VDUSCREEN
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BVC PRCHR3 ; Not teletext
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LDY #$E0 ; Convert $80-$9F to space
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PRCHR3 TYA
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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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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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RTS
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PRCHRSOFT RTS ; *TODO* Jump to gfx
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* Fetch character from screen at (TEXTX,TEXTY) and return MODE in Y
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BYTE87
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GETCHRC LDY VDUBYTES
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DEY ; If VDUBYTE=1, text mode
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BNE GETCHRSOFT ; Graphics mode
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JSR CHARADDR ; Find character address
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PHP ; Disable IRQs while
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SEI ; toggling memory
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BCC GETCHR6 ; Aux memory
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STA $C002 ; Switch to main memory
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GETCHR6 LDA (VDUADDR),Y ; Get character
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STA $C003 ; Back to aux memory
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PLP ; Restore IRQs
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TAY ; Convert character
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AND #$A0
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BNE GETCHR7
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TYA
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EOR #$40
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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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GETCHROK RTS
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GETCHRSOFT RTS ; *TODO* Jump to gfx
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* Get text cursor position
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BYTE86 LDY VDUTEXTY ; ROW ; $86 = read cursor pos
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LDX VDUTEXTX ; COL
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RTS
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* Calculate character address
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CHARADDR LDA VDUTEXTY
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ASL
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TAX
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LDA SCNTAB+0,X ; LSB of row address
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STA VDUADDR+0
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LDA SCNTAB+1,X ; MSB of row address
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STA VDUADDR+1
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LDA VDUTEXTX
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BIT $C01F
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SEC
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BPL CHARADDR40 ; 40-col
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LSR A
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CHARADDR40 TAY ; Y=offset into this row
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RTS
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* (VDUADDR),Y=>character address
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* CC=auxmem
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* CS=mainmem
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* Move cursor left
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VDU08 LDA VDUTEXTX ; COL
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BEQ :S1
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DEC VDUTEXTX ; COL
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BRA :S3
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:S1 LDA VDUTEXTY ; ROW
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BEQ :S3
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DEC VDUTEXTY ; ROW
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LDA #39
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BIT $C01F
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BPL :S2
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LDA #79
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:S2 STA VDUTEXTX ; COL
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:S3 RTS
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* Move cursor right
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VDU09 LDA VDUTEXTX ; COL
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CMP #39
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BCC :S2
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BIT $C01F
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BPL :T11
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CMP #79
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BCC :S2
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:T11 STZ VDUTEXTX ; COL
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LDA VDUTEXTY ; ROW
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CMP #23
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BEQ SCROLL
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INC VDUTEXTY ; ROW
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:DONE RTS
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:S2 INC VDUTEXTX ; COL
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BRA :DONE
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SCROLL JSR SCROLLER
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JSR CLREOL
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RTS
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* Move cursor down
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VDU10 LDA VDUTEXTY ; ROW
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CMP #23
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BEQ :TOSCRL ; JGH
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INC VDUTEXTY ; ROW
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RTS
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:TOSCRL JMP SCROLL ; JGH
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* Move cursor up
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VDU11 LDA VDUTEXTY ; ROW
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BEQ :DONE
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DEC VDUTEXTY ; ROW
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:DONE RTS
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* Move to start of line
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VDU13 LDA #$BF
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JSR CLRSTATUS ; Turn copy cursor off
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STZ VDUTEXTX ; COL
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RTS
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* Move to (0,0)
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VDU30 STZ VDUTEXTY ; ROW
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STZ VDUTEXTX ; COL
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RTS
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* Move to (X,Y)
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VDU31 LDY VDUQ+8
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CPY #24
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BCS :DONE
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LDX VDUQ+7
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CPX #80
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BCS :DONE
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BIT $C01F
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BMI :T9A
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CPX #40
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BCS :DONE
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:T9A STX VDUTEXTX ; COL
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STY VDUTEXTY ; ROW
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:DONE RTS
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|
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* VDU 26 - Reset to default windows
|
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VDU26 LDX VDUMODE
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VDU26A LDA SCNTXTMAXX,X
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STA TXTWINRGT
|
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LDA SCNTXTMAXY,X
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STA TXTWINBOT
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RTS
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|
||||
|
||||
|
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* Initialise VDU driver
|
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***********************
|
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* On entry, A=MODE to start in
|
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*
|
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VDUINIT STA VDUQ+8
|
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|
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* VDU 22 - MODE n
|
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*****************
|
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* At the moment only MODEs available:
|
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* MODE 3 - 80x24 text
|
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* MODE 6 - 40x24 text
|
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* MODE 7 - 40x24 with $80-$9F converted to spaces
|
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* MODE 2 - 280x192 HGR graphics
|
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* MODE 0 defaults to MODE 3
|
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* All others default to MODE 6
|
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*
|
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VDU22 LDA VDUQ+8
|
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AND #$07
|
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STA VDUMODE
|
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TAX ; Set up MODE
|
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LDA #'_' ; Set up default cursors
|
||||
STA CURSOR ; Normal cursor
|
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STA CURSORCP ; Copy cursor when editing
|
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LDA #$A0
|
||||
STA CURSORED ; Edit cursor when editing
|
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LDA #$01
|
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JSR CLRSTATUS ; Clear everything except PrinterEcho
|
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JSR VDU26A
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*
|
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LDA SCNBYTES,X
|
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STA VDUBYTES
|
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LDA SCNCOLOURS,X
|
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STA VDUCOLOURS
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LDA SCNTYPE,X
|
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STA VDUSCREEN
|
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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
|
||||
* TEMP
|
||||
*
|
||||
AND #$01 ; 40col/80col bit
|
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TAX
|
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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
|
||||
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 CLREOL
|
||||
: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 to EOL
|
||||
CLREOL LDA VDUTEXTY ; ROW
|
||||
ASL
|
||||
|
|
@ -275,257 +571,6 @@ CLREOL LDA VDUTEXTY ; ROW
|
|||
STA VDUTEXTX ; COL
|
||||
RTS
|
||||
|
||||
* Clear the screen
|
||||
CLEAR STZ VDUTEXTY ; ROW
|
||||
STZ VDUTEXTX ; COL
|
||||
:L1 JSR CLREOL
|
||||
:S2 LDA VDUTEXTY ; ROW
|
||||
CMP #23
|
||||
BEQ :S3
|
||||
INC VDUTEXTY ; ROW
|
||||
BRA :L1
|
||||
:S3 STZ VDUTEXTY ; ROW
|
||||
STZ VDUTEXTX ; COL
|
||||
RTS
|
||||
|
||||
* Calculate character address
|
||||
CHARADDR LDA VDUTEXTY
|
||||
ASL
|
||||
TAX
|
||||
LDA SCNTAB+0,X ; LSB of row address
|
||||
STA VDUADDR+0
|
||||
LDA SCNTAB+1,X ; MSB of row address
|
||||
STA VDUADDR+1
|
||||
LDA VDUTEXTX
|
||||
BIT $C01F
|
||||
SEC
|
||||
BPL CHARADDR40 ; 40-col
|
||||
LSR A
|
||||
CHARADDR40 TAY ; Y=offset into this row
|
||||
RTS
|
||||
* (VDUADDR),Y=>character address
|
||||
* CC=auxmem
|
||||
* CS=mainmem
|
||||
|
||||
|
||||
* Print char in A at ROW,COL
|
||||
PRCHRC PHA ; Save character
|
||||
LDA $C000
|
||||
BPL :RESUME ; No key pressed
|
||||
EOR #$80
|
||||
:PAUSE1 JSR KBDCHKESC ; Ask KBD to test if Escape
|
||||
BIT ESCFLAG
|
||||
BMI :RESUMEACK ; Escape, skip pausing
|
||||
CMP #$13
|
||||
BNE :RESUME ; Not Ctrl-S
|
||||
STA $C010 ; Ack. keypress
|
||||
:PAUSE2 LDA $C000
|
||||
BPL :PAUSE2 ; Loop until keypress
|
||||
EOR #$80
|
||||
CMP #$11 ; Ctrl-Q
|
||||
BEQ :RESUMEACK ; Stop pausing
|
||||
JSR KBDCHKESC ; Ask KBD to test if Escape
|
||||
BIT ESCFLAG
|
||||
BPL :PAUSE2 ; No Escape, keep pausing
|
||||
:RESUMEACK STA $C010 ; Ack. keypress
|
||||
:RESUME PLA
|
||||
|
||||
* Put character to screen
|
||||
PUTCHRC EOR #$80 ; Convert character
|
||||
TAY
|
||||
AND #$A0
|
||||
BNE PRCHR4
|
||||
TYA
|
||||
EOR #$40
|
||||
TAY
|
||||
PRCHR4 PHY
|
||||
JSR CHARADDR ; Find character address
|
||||
PLA ; Get character back
|
||||
PHP ; Disable IRQs while
|
||||
SEI ; toggling memory
|
||||
BCC PRCHR6 ; Aux memory
|
||||
STA $C004 ; Switch to main memory
|
||||
PRCHR6 STA (VDUADDR),Y ; Store it
|
||||
STA $C005 ; Back to aux memory
|
||||
PLP ; Restore IRQs
|
||||
RTS
|
||||
|
||||
|
||||
* Return char at ROW,COL in A and X, MODE in Y
|
||||
BYTE87
|
||||
GETCHRC JSR CHARADDR ; Find character address
|
||||
PHP ; Disable IRQs while
|
||||
SEI ; toggling memory
|
||||
BCC GETCHR6 ; Aux memory
|
||||
STA $C002 ; Switch to main memory
|
||||
GETCHR6 LDA (VDUADDR),Y ; Get character
|
||||
STA $C003 ; Back to aux memory
|
||||
PLP ; Restore IRQs
|
||||
TAY ; Convert character
|
||||
AND #$A0
|
||||
BNE GETCHR7
|
||||
TYA
|
||||
EOR #$40
|
||||
TAY
|
||||
GETCHR7 TYA
|
||||
EOR #$80
|
||||
TAX ; X=char for OSBYTE
|
||||
LDY #$00
|
||||
BIT $C01F
|
||||
BMI GETCHROK
|
||||
INY ; Y=MODE
|
||||
GETCHROK RTS
|
||||
|
||||
|
||||
BYTE86 LDY VDUTEXTY ; ROW ; $86 = read cursor pos
|
||||
LDX VDUTEXTX ; COL
|
||||
RTS
|
||||
|
||||
* Perform backspace & delete operation
|
||||
VDU127
|
||||
DELETE JSR BACKSPC
|
||||
:S2 LDA #' '
|
||||
JMP PUTCHRC
|
||||
*:S3 RTS
|
||||
|
||||
* Perform backspace/cursor left operation
|
||||
VDU08
|
||||
BACKSPC
|
||||
LDA VDUTEXTX ; COL
|
||||
BEQ :S1
|
||||
DEC VDUTEXTX ; COL
|
||||
BRA :S3
|
||||
:S1 LDA VDUTEXTY ; ROW
|
||||
BEQ :S3
|
||||
DEC VDUTEXTY ; ROW
|
||||
LDA #39
|
||||
BIT $C01F
|
||||
BPL :S2
|
||||
LDA #79
|
||||
:S2
|
||||
STA VDUTEXTX ; COL
|
||||
:S3 RTS
|
||||
|
||||
|
||||
VDU10
|
||||
LDA VDUTEXTY ; ROW
|
||||
CMP #23
|
||||
BEQ :TOSCRL ; JGH
|
||||
INC VDUTEXTY ; ROW
|
||||
RTS
|
||||
:TOSCRL JMP SCROLL ; JGH
|
||||
|
||||
VDU11
|
||||
LDA VDUTEXTY ; ROW
|
||||
BEQ :DONE
|
||||
DEC VDUTEXTY ; ROW
|
||||
:DONE RTS
|
||||
|
||||
VDU13
|
||||
LDA #$BF
|
||||
JSR CLRSTATUS ; Turn copy cursor off
|
||||
STZ VDUTEXTX ; COL
|
||||
RTS
|
||||
|
||||
* Initialise VDU driver
|
||||
***********************
|
||||
* On entry, A=MODE to start in
|
||||
* Assumes workspace has been zero'd by kernel startup
|
||||
*
|
||||
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
|
||||
* MODE 0 defaults to MODE 3
|
||||
* All others default to MODE 6
|
||||
*
|
||||
VDU22 LDA VDUQ+8
|
||||
AND #$07
|
||||
STA VDUMODE
|
||||
LDX #$01 ; 80-col
|
||||
CMP #$00
|
||||
BEQ VDU22A ; MODE 0 -> MODE 3, 80x24, text
|
||||
CMP #$03
|
||||
BEQ VDU22A ; MODE 3 -> MODE 3, 80x24 text
|
||||
CMP #$02
|
||||
BEQ VDU22G ; MODE 2 -> 280x192 HGR
|
||||
DEX ; All other MODEs default to 40-col
|
||||
VDU22A STA $C051 ; Enable Text
|
||||
STA $C00C,X ; Select 40col/80col
|
||||
STA $C055 ; PAGE2
|
||||
STA $C052 ; Clear MIXED
|
||||
STA $C00F ; Enable alt charset
|
||||
BRA VDU22C
|
||||
|
||||
VDU22G STA $C050 ; Enable Graphics
|
||||
STA $C057 ; Hi-Res
|
||||
STA $C054 ; PAGE1
|
||||
STA $C052 ; Clear MIXED
|
||||
JSR VDU16 ; Clear HGR screen
|
||||
|
||||
* Set up default cursors
|
||||
VDU22C LDA #'_'
|
||||
STA CURSOR ; Normal cursor
|
||||
STA CURSORCP ; Copy cursor when editing
|
||||
LDA #$A0
|
||||
STA CURSORED ; Edit cursor when editing
|
||||
* JSR VDU15 ; Turn off paged scrolling
|
||||
* JSR VDU20 ; Reset colours
|
||||
* JSR VDU26 ; Reset windows
|
||||
* ; Drop through into VDU12, clear screen
|
||||
|
||||
|
||||
VDU12
|
||||
JMP CLEAR
|
||||
|
||||
VDU30
|
||||
STZ VDUTEXTY ; ROW
|
||||
STZ VDUTEXTX ; COL
|
||||
RTS
|
||||
|
||||
VDU31
|
||||
LDY VDUQ+8
|
||||
CPY #24
|
||||
BCS :DONE
|
||||
LDX VDUQ+7
|
||||
CPX #80
|
||||
BCS :DONE
|
||||
BIT $C01F
|
||||
BMI :T9A
|
||||
CPX #40
|
||||
BCS :DONE
|
||||
:T9A
|
||||
STX VDUTEXTX ; COL
|
||||
STY VDUTEXTY ; ROW
|
||||
:DONE RTS
|
||||
|
||||
* Perform cursor right operation
|
||||
VDU09
|
||||
LDA VDUTEXTX ; COL
|
||||
CMP #39
|
||||
BCC :S2
|
||||
BIT $C01F
|
||||
BPL :T11
|
||||
CMP #79
|
||||
BCC :S2
|
||||
:T11
|
||||
STZ VDUTEXTX ; COL
|
||||
LDA VDUTEXTY ; ROW
|
||||
CMP #23
|
||||
BEQ SCROLL
|
||||
INC VDUTEXTY ; ROW
|
||||
:DONE RTS
|
||||
:S2 INC VDUTEXTX ; COL
|
||||
BRA :DONE
|
||||
SCROLL JSR SCROLLER
|
||||
JSR CLREOL
|
||||
RTS
|
||||
|
||||
* Scroll whole screen one line
|
||||
SCROLLER LDA #$00
|
||||
:L1 PHA
|
||||
|
|
@ -569,13 +614,6 @@ SCR1LINE ASL ; Dest addr->ZP1
|
|||
BNE :L1
|
||||
RTS
|
||||
|
||||
* Addresses of screen rows in PAGE2
|
||||
SCNTAB DW $800,$880,$900,$980,$A00,$A80,$B00,$B80
|
||||
DW $828,$8A8,$928,$9A8,$A28,$AA8,$B28,$BA8
|
||||
DW $850,$8D0,$950,$9D0,$A50,$AD0,$B50,$BD0
|
||||
|
||||
|
||||
* May end up moving graphics bits to separate source
|
||||
|
||||
* VDU 1 - Send one character to printer
|
||||
VDU01 RTS
|
||||
|
|
@ -686,9 +724,6 @@ HGRPOS LDA VDUQ+5
|
|||
XPIXEL DW $0000 ; Previous plot x-coord
|
||||
YPIXEL DB $00 ; Previous plot y-coord
|
||||
|
||||
* VDU 26 - Reset to default windows
|
||||
VDU26 RTS
|
||||
|
||||
* VDU 28,left,bottom,right,top - define text window
|
||||
VDU28 RTS
|
||||
|
||||
|
|
@ -698,23 +733,10 @@ VDU29 RTS
|
|||
|
||||
|
||||
|
||||
* OSBYTE &75 - Read VDUSTATUS
|
||||
*****************************
|
||||
BYTE75 LDX VDUSTATUS
|
||||
RTS
|
||||
|
||||
* TEST code for VIEW
|
||||
* OSBYTE &A0 - Read VDU variable
|
||||
********************************
|
||||
BYTEA0 LDY #79 ; Read VDU variable $09,$0A
|
||||
LDX #23
|
||||
BYTEA0 LDY VDUVARS+1,X
|
||||
LDA VDUVARS+0,X
|
||||
TAX
|
||||
RTS
|
||||
* TEST
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user