Originally posted by Sukasa

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I'm sure it would, but I'd written that in hex directly... Just a sec, I'll write it out by hand *pulls out 65816ref.hlp*

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PHP
LDA $14AF
CMP #$00
BEQ end
NOP ;used earlier, not used now
PLP ;end my code segment, begin the original code
LDA $7E0076
BEQ end2 ;bne without a CMP statement (WTF?).
LDY #$30 ;_{...and LM said not to overwrite Y...}
STY $1693 ;stare Y to somewhere
LDY #$01 ;and load Y again...
end2:
RTS ;this returns if the block had been executed
end:
PLP ;if the onoff was ON, this pulls the processor before returning
RTS

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Originally posted by Sukasa

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erm, the code overwriting Y isn't mine. It's whoever wrote the block's code. My code only adds the PHP/PLP instructions because the other code uses the processer status from before the block runs

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Originally posted by Sukasa

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PHP ; +1 byte on the stack

LDA $14AF
CMP #$00

BEQ END

NOP

PLP ; -1 byte on the stack

LDA $7E0076

BEQ END2 ; you don't need a CMP. If the above address contains zero when it's loaded to A, he Z flag will be set and the branch will occur. So yeah, CMP #$00 is a waste of time when you use BEQ.

LDY #$30
STY $1693

LDY #$01

END2:

RTS

END:

PLP ; -1 byte on the stack

RTS

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