I edited martypc.toml as follows to add IBM PC 5150 (with Rev.1 BIOS)
rom_override = [
{ path = "./roms/5700019.u29", address = 0xF6000, offset=0, org="Normal" },
{ path = "./roms/5700027.u30", address = 0xF8000, offset=0, org="Normal" },
{ path = "./roms/5700035.u31", address = 0xFA000...