mirror of
https://github.com/fadden/6502bench.git
synced 2024-07-14 05:28:55 +00:00
5b75ae35fc
For nonzero values we were leaving Z=prev, which is wrong when Z=0 because the AND result might be zero. Now if Z=1 we leave it alone, but if Z=0 we now set it to Z=?. Test 1003-flags-and-branches was testing for the (incorrect) behavior, so we're now running into a BRK. This is fine.
264 lines
3.9 KiB
ArmAsm
264 lines
3.9 KiB
ArmAsm
org $1000
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clc
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xce
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sep #$ff
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clv
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cld
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cli
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clc
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lda #$80
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lda #$01
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sed
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sei
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sec
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lda #$ff
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adc #$00
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sep #$ff
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rep #$80
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rep #$40
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rep #$20
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mx %01
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rep #$10
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mx %00
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rep #$08
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rep #$04
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rep #$02
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rep #$01
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sep #$00
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sep #$ff
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mx %11
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rep #$00
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rep #$ff
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mx %00
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lda #$feed
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sec
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xce
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mx %11
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lda #$ff
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rep #$30
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mx %11
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lda #$ff
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clc
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xce
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lda #$ff
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rep #$20
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mx %01
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sep #$10
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lda #$0000
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ldx #$01
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ldy #$02
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sep #$20
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mx %11
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rep #$10
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mx %10
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lda #$01
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ldx #$0000
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ldy #$0000
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sep #$30
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mx %11
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lda #$00
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pha
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plp
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rep #$80
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bpl L105F
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dfb $00
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dfb $00
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L105F sep #$80
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bpl :L1065
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bmi :L1067
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:L1065 dfb $00
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dfb $00
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:L1067 rep #$40
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bvc :L106D
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dfb $00
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dfb $00
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:L106D sep #$40
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bvs :L1073
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dfb $00
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dfb $00
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:L1073 rep #$01
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bcc :L1079
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dfb $00
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dfb $00
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:L1079 sep #$01
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bcs :L107F
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dfb $00
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dfb $00
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:L107F rep #$02
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bne :L1085
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dfb $00
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dfb $00
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:L1085 sep #$02
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beq :L108B
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dfb $00
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dfb $00
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:L108B sep #$ff
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lda #$01
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bne :L1093
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dfb $00
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dfb $db
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:L1093 lda #$00
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beq :L1099
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dfb $00
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dfb $db
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:L1099 bpl :L109D
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dfb $00
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dfb $db
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:L109D lda #$80
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bmi :L10A3
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dfb $00
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dfb $db
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:L10A3 lda #$ff
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and #$00
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beq :L10AB
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dfb $00
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dfb $db
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:L10AB lda #$00
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and #$ff
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beq :L10B3
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dfb $00
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dfb $db
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:L10B3 lda #$ff
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and #$7f
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bne :L10BB
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brk
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dfb $db
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:L10BB bpl :L10BF
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dfb $00
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dfb $db
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:L10BF lda #$ff
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and #$80
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bmi :L10C7
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dfb $00
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dfb $db
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:L10C7 lda #$00
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ora #$00
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beq :L10CF
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dfb $00
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dfb $db
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:L10CF ora #$01
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bne :L10D5
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dfb $00
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dfb $db
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:L10D5 lda #$00
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ora #$7f
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bpl :L10DD
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dfb $00
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dfb $db
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:L10DD ora #$80
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bmi :L10E3
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dfb $00
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dfb $db
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:L10E3 lda :L10E3
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sec
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ror A
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bmi :L10EC
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dfb $00
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dfb $dc
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:L10EC clc
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ror A
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bpl :L10F2
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dfb $00
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dfb $dc
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:L10F2 lda #$00
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sec
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rol A
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bne :L10FA
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dfb $00
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dfb $dc
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:L10FA clc
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php
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sec
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plp
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bcc :L1102
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dfb $00
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dfb $00
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:L1102 sec
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bcs :L1106
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:L1105 clc
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:L1106 lda $33
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beq :L1105
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bcs :L110E
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lda $44
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:L110E nop
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rep #$20
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mx %01
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sep #$10
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jsr :L112A
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rep #$30
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mx %00
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jsr :L1130
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sep #$30
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mx %11
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jsr :L1130
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rep #$20
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mx %01
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sep #$10
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jsr :L112A
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sep #$30
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mx %11
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rts
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mx %01
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:L112A lda #$1234
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ldx #$ff
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rts
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mx %11
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:L1130 lda #$ff
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ldx #$ee
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ldy #$dd
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rts
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