I’ve updated the Atari VCS core for the MiST and added F4 bank switching. F4 is the standard Atari scheme for 32kb roms.
Additionally I’ve replaced the 6502 core with the core from Peter Wendrich with his permission. It’s supposed to support illegal opcodes which may help with some previously not working roms.
Unfortunately my test roms (atarsi, bang!, Donkey Kong homebrew) didn’t work properly but the changes won’t harm either 🙂
Grab it from the MiST FPGA Google repository as usual.