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11 lines
237 B
ArmAsm
11 lines
237 B
ArmAsm
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; relies on different behavior of decimal mode on 6502 vs 65c02
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detect_65c02:
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sed ; set decimal mode
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clc ; clear carry for add
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lda #$99 ; 99 decimal
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adc #$01 ; +1 gives 00 and sets Z on 65C02
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cld ; exit decimal mode
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rts
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