Hello again, friends.

I have recently been studying the data path controls for the 6502 absolute indexed addressing mode instructions. As I'm sure we all know, when an instruction in this addressing mode crosses a page boundry, the 6502 takes one cycle to "fix up" the upper bytes of the address ...

Thanks everyone, I think I understand now.

Hello, friends.

I'm working on a 6502 emulator as a hobby project. I've been making much use of the indispensable Visual6502 simulator in this endeavour, which has greatly aided me (along with many other resources including this forum). However, there is one behaviour of the simulator that I don't ...