Thanks!, sorry missed that. I don't mind being out with the cycles (as I can fix that) but being out by instructions puzzles me. But I am running the test to completion with 1,183 extra instructions. Weird.

Hi, I created a python based 6502 emulator. It runs slowly but I made it to learn the processor. It successfully runs the Klaus functional test (well I assume successful as it exits nicely at address 0x3469). However, it runs thought with around1M cycles less that stated above. This is fine as I ...