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When turning the ROM off and on, also change the chargen pointer.

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This commit is contained in:
Christian Groessler 2013-05-31 01:50:07 +02:00
parent 8e632b2847
commit 451b34bc75
1 changed files with 7 additions and 30 deletions
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37
libsrc/atari/shadow_ram_handlers.s
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@ -17,11 +17,17 @@
lda PORTB
and #$fe
sta PORTB
lda #>__CHARGEN_START__
sta CHBAS
sta CHBASE
.endmacro
.macro enable_rom
lda PORTB
ora #1
sta PORTB
lda #$E0
sta CHBAS
sta CHBASE
.endmacro
.segment "INIT"
@ -35,6 +41,7 @@ sram_init:
ldx #0
stx NMIEN ; disable NMI
; disable ROMs
disable_rom
; setup interrupt vectors
@ -67,11 +74,6 @@ sram_init:
lda #>my_SIOV
sta SIOV+2
; set new chargen
lda #>__CHARGEN_START__
sta CHBAS
sta CHBASE
; enable interrupts
lda #$40
sta NMIEN
@ -147,29 +149,4 @@ kret: pha
pla
rts
.if 0
.import KEYBDV_wrapper
.import cursor,mul40
_cgetc:
jsr setcursor
.if .not .defined(__ATARIXL__)
jsr @1
.else
jsr KEYBDV_wrapper
.endif
ldx #0
rts
.if .not .defined(__ATARIXL__)
@1: lda KEYBDV+5
pha
lda KEYBDV+4
pha
lda #12
sta ICAX1Z ; fix problems with direct call to KEYBDV
rts
.endif
.endif
.endif ; .if .defined(__ATARIXL__)