that's a bit of relief ... I think you're correct about the 7220, seems I got mixed up in the thousands of non-results you get when you google classic ICs. The 8741 microcontroller has a 1k EProm though, so I'll probably have to get them dumped.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20