| Model | ROM label | Size | Location | Content | |---------|---------------|--------|-----------|---------------| | PC-8001 | PC-8001-01 | 2KB | Monitor | Boot, editor | | PC-8001 | PC-8001-02 | 2KB | Monitor | Extended I/O | | PC-8001 | PC-8001-03? | 2KB | Character | CG (80 col) | | PC-8001A| PC-8001A-01 | 2KB | Monitor | Updated | | PC-8001A| PC-8001A-02 | 2KB | Monitor | – | | PC-8001A| PC-8001A-CG | 4KB? | Character | CG + Kanji? |
Recently, archivists discovered previously unknown revision ROMs for the PC-8001mkII, containing debugging symbols left in by NEC engineers. These "prototype ROMs" offer a fascinating glimpse into the development process. The community is also working on —patching the Japanese character ROMs to display full English ASCII and creating English-language menus for emulators. nec pc-8000 roms