> See http://www.6502.org/tutorials/compare_instructions.html
Heh-now I don't feel *quite* so bad with my struggles with
comparisons given that I see that one of *only* two tutorials
at 6502.org is dedicated to the topic. (And by playing around
with that 6502 emulator, I did realize on my own that the
code I was trying to cut and paste and mangle was probably for
signed only)
> I think what you want is:
> LDA var
> CMP #MAX
> BMI ltMAX
> LDA #MAX
> ltMAX
> CMP #MIN
> BPL gtMIN
> LDA #MIN
> gtMIN
> STA var
That seems to work. I don't need to clear carry or anything.
(Oh. I see there is no "clear minus" instruction anyway.
I guess the LDA will always set that, but not the carry.
I guess a sharper 6502 programmer would know that pretty
much instantly...)
Thank you!
--
KirkIsrael@xxxxxxxxxxxxx http://kisrael.com
"How do we stop an elephant if it goes berserk? What do we do? Do we use
an AK-47? An M-16? An AR-15?... Frankly, would that stop an elephant?
I really doubt it. Do they have a bazooka?" --US Senator Bob Smith
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