Einstein System ROM (MOS 1.2 & 1.21)

The system ROM archive MAME's einstein driver needs to emulate the Tatung Einstein TC-01. Contains the machine's boot ROM in both revisions MAME supports - MOS 1.2 (mos12.i023) and MOS 1.21 (mos121.i023) - matching MAME's own expected checksums for this ROM set.

Drop this file, still zipped, into MAME's ROMs folder (see our MAME setup guide for exactly where that is on macOS, Windows and Linux) and run mame einstein -verifyroms to confirm it's recognised before booting a disk image.

The same archive is also the source for a real TC01: unzip it and burn mos12.i023 or mos121.i023 onto a replacement EPROM chip if you're restoring original hardware rather than emulating it.