I've updated https://martypc.net with a new build.

You can jump directly to Area 5150
https://martypc.net/?mount=fd:0:Area%20 ... rsion).img

Or try an IBM PCjr
https://martypc.net/?machine_config_name=ibm_pcjr

No ROMS are directly downloadable, so I hope this doesn't break any rules.

Thinking about upgrading my Sound Blaster 2.o to a Sound Blaster Pro (CT1330) though. Just double the OPL2 chips and mixer support added (no tricky OPL3 stuff or custom MIDI synth required).

I'd need to make the existing OPL2 chip emulation modular (like the CPU) though, to make it emulate two chips simultaneously.