This emulator is written entirely in assembler (A86) and is under 22k long. This is a beta version (or release 2.0 as Microsoft would put it !) but it seems to work fairly well with the few cartridges I've tested it with. There are several bugs fixed since 0.1 which means that most games I've trieds seem to at least start. Chess and Othello don't work (don't know why yet). The 8 and 16k ROM emulation seems erratic. Somethings work fine,some don't work at all and I don't know why - if the emu is correct they should all work a bit or all fail.