Search found 2 matches

by Ringeru
Sat May 04, 2019 1:18 pm
Forum: NESdev
Topic: CMP setting N flag when it shouldn't?
Replies: 30
Views: 19903

Re: CMP setting N flag when it shouldn't?

Thanks for the explanation, that makes sense!
by Ringeru
Sat May 04, 2019 12:44 pm
Forum: NESdev
Topic: CMP setting N flag when it shouldn't?
Replies: 30
Views: 19903

CMP setting N flag when it shouldn't?

Hi everyone, This is probably a newbie question, but I don't fully understand the behavior of CMP in 6502 assembly. When comparing two numbers (say accumulator with something in memory), I thought it set the N flag when the accumulator is smaller than memory. However, in the following example, it se...