Identifying parts on a VT100 logic board

From: Paul Williams <>
Date: Sat Mar 10 09:18:51 2001

Pete Turnbull wrote:
> On Mar 10, 12:41, Paul Williams wrote:
> > There are four socketed chips together, labelled E40, E45, E52 and
> > E56. Does anyone have the schematics and know what these contain?
> They're the VT1xx code ROMs. In a VT100, they are contain ROMs with
> part numbers 23031-E2, 23032-E2, 23033-E2, and (surprise, surprise)
> 23034-E2. In a VT100-WC, -WK, or -AC, they contain 23095-E2,
> 23096-E2, 23139-E2, 23140-E2; the -WC and -WK variants also have
> an extra character ROM, 23094-E2. A VT125 or VT105 should have
> the same as a plain VT100 except that the 23031-E2 is replaced with
> a 23061-E2.

Thank you Pete, that was swift and comprehensive! Is this list on the
web anywhere, or do you just happen to keep schematics to hand?

Both boards have 23061-E2, 23032-E2, 23033-E2 and 23034-E2, and fifth
ROM elsewhere labelled 23018-E2 (soldered, unfortunately).
Received on Sat Mar 10 2001 - 09:18:51 GMT

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