Not sure why I made this yet, but I enjoyed the process and now I feel a lot more comfortable with the 6502 instruction set

Available at: https://github.com/bencoder/6502

I added a basic console IO interface and got Wozmon working on it

Notes:
- Haven't done anything clever with opcode decoding, just a big switch statement
- It passes the Klaus functional tests
- Cycle counts are probably not accurate, haven't been thoroughly tested (just basing it on memory read/writes, with +1 adjustment when paging in indexed addressing modes)
- illegal/undocumented opcodes haven't been implemented
- undefined behaviour (I think that's only the weird decimal mode flags) hasn't been implemented/tested

Comments/Criticism welcome

Welcome! Nice idea - haven't tried it though. Should it be relative easy to make up an HTML page, and serve the emulator from github directly as an in-browser emulator?

Neat! How fast can you "clock" it? It looks like it's set to 1 MHz, but can it go faster?

Sorry for the delayed response


It goes about 70MHz unrestricted while running the test suite (on a 2020 Macbook Air M1)


Yeah that might be a nice idea to show it off better - thanks