Unknown Z80 CPU board and backplane ID anyone?

Adrian Graham binarydinosaurs at gmail.com
Mon Jul 30 18:13:15 CDT 2018

> On 30 Jul 2018, at 23:50, Jules Richardson via cctalk <cctalk at classiccmp.org> wrote:
> On 07/30/2018 12:27 PM, Adrian Graham via cctalk wrote:
>> Hi folks,
>> A friend of mine in the UK is looking for any info on the following
>> boards. The CPU board is marked ‘VA 03-907023-00’ and features a Z80
>> with 16K RAM and an 18.432MHz crystal. The backplane is also VA and has
>> 11 132-pin slots that aren’t all identical implying usage for different
>> cards in those locations. Voltages are +5/-5/+12V.
> Those 11 slots are 100 pins, surely - the same number as the CPU board has.

Hehehehe, I looked at the silkscreen on the lower right pin and read ’66’ not ’99’ XD. I’ve been up since 6am which is clearly having an effect.

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