I recently acquired one of these units and am in the process of searching for manuals or any info AT ALL on this unit! So far I've figured out how to call up addresses, store data and program it (havn't really done much since I can't figure out more then how to play with the registers, the output hardware is alien to me :/) I'd love to get a copy of the rom as it was written in the manual, comments and all. Also, if anyone has a manual and wants it scanned, I'll be more then happy to do that for you! And I'm especially keen to know how to manipulate the speaker and output LEDs