Hi, All, I was dumping ROMs and EPROMs this weekend (including my ROM Rabbit which I finally tracked down again!) and in one 8032, I found an oddball. The chip has no markings - even the manufacturer's stamps on the bottom have been filed off. The machine has application-specific labels stuck to the front faces of the keys (where graphics symbols would be on a graphic keyboard) but I have no other information on this computer - it's likely I picked it up from a University Surplus sale 25 years ago. I know nonsense ROMs have been used as software keys, but this is *not* the standard 2022 Visicalc key ROM. It does not appear to be 6502 code and there are no strings of any informational significance buried in it. I'm happy to send it around, but for a teaser, here's a few lines of the hexdump. 000002 aa 55 02 00 29 13 2b 0b 05 00 29 11 2b 11 1b 0b 000012 09 00 70 2a 3d 25 17 28 41 c8 2a 3d 24 16 25 3f 000022 84 48 20 30 50 2a 3d 41 2c 2a 1c d4 11 10 16 06 000032 16 07 11 0f 7b 51 16 2c 17 2c 31 84 05 25 ff 94 000042 f6 30 84 23 2c 41 8e 2c 20 10 f0 94 e1 4a 51 4b The closest thing to any sort of coherent string might be a command letter list late in the dump... $ 4 2 6 / - ) 9 + 0 . , * : E G C A H F D B > & % I suppose this could be some sort of embedded firmware where the designers swapped a data line or two for layout then convolved the ROM contents to match, but I think it's more likely to be code for a different processor architecture. Any ideas? -ethanReceived on 2018-03-26 18:02:35
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