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https://github.com/fadden/6502bench.git
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98914e9f80
The 65816 definition makes it a two-byte instruction, like COP. On the 6502 it acted like a two-byte instruction, but in practice very few assemblers treat it that way. Very few humans, for that matter. So it's now treated as a single byte instruction, with the following byte encoded as a data value.
79 lines
1.4 KiB
ArmAsm
79 lines
1.4 KiB
ArmAsm
.setcpu "65816"
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; .segment "SEG000"
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.org $1000
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.a8
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.i8
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clc
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xce
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sep #$30
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jsr L1014
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jsr L101C
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jsr L102A
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jsr L102F
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jsr L1059
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rts
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L1014: lda #$00
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.byte $2c
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L1017: lda #$01
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beq L1017
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rts
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L101C: sep #$30
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lda $00
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beq L1025
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lda #$00
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brk
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L1025: sta $012345
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rts
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L102A: .byte $20
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L102B: rts
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.byte $ea
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bra L102B
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L102F: .byte $2c
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L1030: .byte $2c
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L1031: .byte $2c
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L1032: .byte $2c
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L1033: .byte $2c
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L1034: .byte $2c
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L1035: .byte $2c
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L1036: .byte $2c
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L1037: .byte $2c
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L1038: nop
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nop
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asl A
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bcc L102F
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asl A
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bcc L1030
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asl A
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bcc L1031
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asl A
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bcc L1032
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asl A
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bcc L1033
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asl A
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bcc L1034
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asl A
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bcc L1035
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asl A
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bcc L1036
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asl A
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bcc L1037
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asl A
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bcc L1038
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rts
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L1059: .byte $2c
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L105A: nop
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.byte $ad
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L105C: lda $00
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asl A
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bcc L105A
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asl A
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bcc L105C
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.byte $af
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