The situation will require some work but it's not disaster .Dbug wrote: ↑Sat Jan 11, 2020 3:40 pmRegarding the machines, I will have to wait for the diagnostic cartridge from Vyper, but what I can tell you is that the motherboard uses 2 memory chips (tms4464-15nl) instead of the usual 8, and nowhere is written "Designed by Tangerine Computer Systems Ltd" (but there is a "ORIC 1".
One of the machines is missing the ULA and the ROM, one does boot and start, you can type, you can hear the sound of the clickety, can zap,explode, etc... but the display is garbled, like if the ULA was not decoding the right locations for the display.
The 2-chips 4464 exemplar is rare and interesting, I expect to get such one soon. Else I can supply you with how many ULA's you want. Unfortunately I don't have any 2-chips (i.e. the ROM equivalent of 2764) original ROM's, may be I have one spare original 27128, need to check. PM me what you may need it will be send with the Exos.