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ba35f88d02
We weren't altering the status flags after a BRK because of the assumption that a BRK was a crash. For an inline BRK, such as a SOS call, execution continues. We need to mark NVZC indeterminate or we may incorrectly handle conditional branches that follow. The BRK instruction now uses the same flag updater as JSR, since it's effectively a subroutine call to unknown code. If execution doesn't continue across the BRK then the flags don't matter. Updated 20182-extension-scripts to exercise this.
131 lines
2.6 KiB
ArmAsm
131 lines
2.6 KiB
ArmAsm
.cpu "65816"
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.enc "sg_hiascii"
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.cdef $20,$7e,$a0
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.enc "sg_ascii"
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.cdef $20,$7e,$20
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PrintInlineL1String = $011000
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PrintInlineL2String = $012000
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PrintInlineDciString = $013000
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* = $1000
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.as
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.xs
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clc
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xce
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sep #$30
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jsr PrintInline8String
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.text "01234567"
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jsr PrintInlineRev8String
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.text "76543210"
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jsr PrintInlineNullString
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.null "null-term string"
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jsl PrintInlineL1String
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.ptext "string with length/1"
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jsl PrintInlineL2String
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.text $14,$00,"string with length/2"
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jsl PrintInlineDciString
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.shift "DCI string"
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jsr L1800
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jsr L184F
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jsr L1848
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brk #$01
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.word data01
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brk #$02
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.word data02
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nop
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jsr L1085
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.byte $24
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L1085 .byte $a9
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.byte $00
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sta $ff
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.byte $ea
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jmp Next1
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PrintInline8String rts
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PrintInlineRev8String rts
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PrintInlineNullString rts
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data01 .word 4386
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.byte $33,$44
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.dword $88776655
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.byte $99,$88,$77,$66
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.byte 'f'
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.byte 'F' | $80
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.byte $40
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.byte $c1
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.byte $42
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.byte $c3
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.byte $44
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.byte $c5
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.byte $46
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.byte $c7
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.long PrintInlineL2String
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.word data02
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.byte $80
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data02 .word _data03
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.byte $80
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.enc "sg_hiascii"
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_data03 .text "AllEight"
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NoCont pla ;split across address change
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pla
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rts
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L10BA jsr NoCont
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.byte $00
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.byte $80
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L10BF jsr NoCont
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.byte $00
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.byte $80
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Next1 jsr L10BA
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jsr _L10CF
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clc
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jsr L10BF
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rts
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_L10CF sec
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jsr L10BF
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clc
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brk #$02
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.word data02
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bcc _L10DE
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bcs _L10DE
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.byte $00
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.byte $80
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_L10DE rts
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.fill 289,$00
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.logical $1800
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L1800 jsr PrintInlineNullString
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per $8778
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rtl
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.byte $65
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.byte $6e
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.byte $20
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.byte $01
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.here
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.logical $1840
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.enc "sg_ascii"
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.text "string"
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.byte $00
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.byte $60
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L1848 jsl PrintInlineL2String
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asl a
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brk #$60
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L184F jsr PrintInlineNullString
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adc $6e
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.byte $64
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.here
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