...that's what i'm wondering now while looking at the ROR behavior.

e.g.: ROR Accumulator:


but it's only that? or i'm missing the...:

...final line?

in that case, flags are setted/reseted relying on the accumulator's (or whatever the source is) final value? or is it correct to change the flags BEFORE the original data gets overwriten?

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sorry about my english, i'm from Argentina :S

http://felliniycia.comule.com/

Yes, you need the ACC=src line. With that line, it looks correct. The N and Z flags are always based on the final value (for any instruction that affects them), not the original value. For other addressing modes, you would read and write to the appropriate memory location rather than the accumulator, of course.

...so it means that the instruction DO overwrite the original data, even in all the others addressing modes.

thanks a lot mate!

_________________
sorry about my english, i'm from Argentina :S

http://felliniycia.comule.com/