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Use proper mnemonics

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This commit is contained in:
Karri Kaksonen 2022-03-25 15:02:43 +02:00
parent 8d0b0e6ffc
commit 4a71a1fbb2
1 changed files with 9 additions and 8 deletions
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17
libsrc/atari7800/get_tv.s
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@ -4,6 +4,7 @@
; unsigned char get_tv (void)
;
.include "atari7800.inc"
.include "get_tv.inc"
.export _get_tv
.segment "DATA"
@ -25,30 +26,30 @@ _paldetected:
lda #$FF
cmp _paldetected
bne L8
L1: lda $0028
L1: lda MSTAT
and #$80
bne L1
L2: lda $0028
L2: lda MSTAT
and #$80
beq L2
L3: lda $0028
L3: lda MSTAT
and #$80
bne L3
lda #$00
sta M0001
jmp L5
L4: sta $0024
sta $0024
L4: sta MWSYNC
sta MWSYNC
dec M0001
L5: lda $0028
L5: lda MSTAT
and #$80
beq L4
lda M0001
cmp #$78
bcc L6
lda #$00
lda #TV::NTSC
jmp L7
L6: lda #$01
L6: lda #TV::PAL
L7: sta _paldetected
ldx #$00
L8: lda _paldetected