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Implement VDU29 (gfx origin) handling.

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Bobbi Webber-Manners 2022-09-23 01:23:51 -04:00
parent 1aeacf29b6
commit 1aa49a8014
2 changed files with 22 additions and 6 deletions
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BIN
applecorn.po
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28
auxmem.vdu.s
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@ -1065,15 +1065,15 @@ VDUCOPYEXIT RTS
*
* TO DO:
* coord=coord+origin
* scale coord
* clip to viewport
VDU25 LDA VDUQ+4
AND #$04 ; Bit 2 set -> absolute
BNE :S0
JSR RELCOORD
:S0 LDX #7
JSR RELCOORD ; Relative->Absolute coords
BRA :S1
:S0 JSR ADJORIG ; Adjust graphics origin
:S1 LDX #7
VDU25BACKUP1 LDA PIXELPLOTX+0,X ; Copy pixel coords
STA PIXELPLOTX+4,X ; POSN becomes LAST
DEX ; and PLOT becomes POSN
@ -1086,14 +1086,30 @@ VDU25BACKUP2 LDA GFXPOSNX,X ; POSN becomes LAST
DEX
BPL VDU25BACKUP2
LDA VDUPIXELS
BEQ :S1
BEQ :S2
JSR HGRPLOTTER
:S1 LDA $C000 ; This and PRCHRC need to be
:S2 LDA $C000 ; This and PRCHRC need to be
EOR #$80 ; made more generalised
BMI VDU25EXIT ; No key pressed
JSR KBDCHKESC ; Ask KBD to test if Escape
VDU25EXIT RTS
* Adjust graphics origin
ADJORIG CLC
LDA GFXORIGX+0
ADC VDUQ+5
STA VDUQ+5
LDA GFXORIGX+1
ADC VDUQ+6
STA VDUQ+6
CLC
LDA GFXORIGY+0
ADC VDUQ+7
STA VDUQ+7
LDA GFXORIGY+1
ADC VDUQ+8
STA VDUQ+8
RTS
* Add coordinates to GFXPOSNX, GFXPOSNY
RELCOORD CLC