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Fixed BYTE87 to work with GS banks E0/E1.

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Bobbi Webber-Manners 2021-09-26 20:17:24 -04:00
parent 03d0f6910b
commit 0299f72e8f
2 changed files with 29 additions and 9 deletions
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applecorn.po
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38
auxmem.vdu.s
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@ -351,11 +351,11 @@ PRCHR3 TXA
PRCHR4 JSR CHARADDR ; Find character address
TXA ; Get character back
BIT VDUBANK
* BPL PRCHR5 ; Not AppleGS, use short write
* >>> WRTMAIN
* STA [VDUADDR],Y
* >>> WRTAUX
* BRA PRCHR8
BPL PRCHR5 ; Not AppleGS, use short write
>>> WRTMAIN
STA [VDUADDR],Y
>>> WRTAUX
BRA PRCHR8
PRCHR5 PHP ; Disable IRQs while
SEI ; toggling memory
BCC PRCHR6 ; Aux memory
@ -374,6 +374,8 @@ PRCHR8 PLA
* Always read from text screen (which we maintain even in graphics mode)
BYTE87
GETCHRC JSR CHARADDR ; Find character address
BIT VDUBANK
BMI GETCHRGS
PHP ; Disable IRQs while
SEI ; toggling memory
BCC GETCHR6 ; Aux memory
@ -392,6 +394,24 @@ GETCHR7 TYA
LDY VDUMODE ; Y=MODE
TAX ; X=char
GETCHROK RTS
GETCHRGS PHP ; Disable IRQs while
SEI ; toggling memory
BCC GETCHR8 ; Aux memory
STA $C002 ; Switch to main memory
GETCHR8 LDA [VDUADDR],Y ; Get character
STA $C003 ; Back to aux memory
PLP ; Restore IRQs
TAY ; Convert character
AND #$A0
BNE GETCHR9
TYA
EOR #$40
TAY
GETCHR9 TYA
EOR #$80
LDY VDUMODE ; Y=MODE
TAX ; X=char
RTS
* OSBYTE &86 - Get text cursor position
@ -630,8 +650,8 @@ VDU22G STA $C050 ; Enable Graphics
* Clear to EOL
CLRLINE
CLREOL JSR CHARADDR ; Set VDUADDR=>start of line
* BIT VDUBANK
* BMI CLREOLGS ; AppleGS
BIT VDUBANK
BMI CLREOLGS ; AppleGS
LDY #39
LDA #$A0
:L1 STA (VDUADDR),Y
@ -690,8 +710,8 @@ SCR1LINE PHA
PHA
INC A
JSR CHARADDRY ; VDUADDR=>line A+1
* BIT VDUBANK
* BMI SCROLLGS
BIT VDUBANK
BMI SCROLLGS
LDY #39
:L2 LDA (VDUADDR),Y
STA (VDUADDR2),Y