The MOS 6502 and the Best Layout Guy in the World

Re:The MOS 6502 and the Best Layout Guy in the World by exception on Monday January 03, 2011 @07:02PM (#2065217)

Heh, yeah I still remember 6502 opcodes... 4C xx xx is jmp absolute, 20 xx xx is jsr (jump subroutine) absolute, A9 xx xx is load accumulator absolute, 8D store accumulator, 60 is rts... I could go on.

Typing shit in to the hex monitor for a few years will do that :)

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Re:The MOS 6502 and the Best Layout Guy in the World by Someone on Tuesday January 04, 2011 @07:34AM (#2066707)

A9 xx xx is load accumulator absolute

Make that A9 xx; The 6502 accumulator is 8 bits.

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Re:The MOS 6502 and the Best Layout Guy in the World by exception on Tuesday January 04, 2011 @05:18PM (#2068766)

Thanks for the correction, you're right A9 is load immediate I was mixing it up with AD xx xx which follows as 8D is the equivalent store.

I wasn't saying that the accumulator was 16 bit though, rather that the load is from an absolute 16 bit address.

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