MCS-80 System Design Kit

From: Sellam Ismail <>
Date: Mon Dec 4 14:14:04 2000

On Mon, 4 Dec 2000, Tony Duell wrote:

> If nobody has the manuals (and the manual would include at least a
> schematic), then you may be able to guess and get something that will
> work. I've actually gone one stage 'worse' -- I got a completely
> unlabelled bare Eurocard-size PCB, figured out that it was for an Acorn
> 'System', then worked out what the chips had to be and then worked out
> what the passives were as well. For the record the main chip was an
> AY-3-8910 sound generator interfaced to the 6502 bus by a 6821. Other
> chips were TTL for the address decoder, space for an EPROM, and a small
> audio amplifier.

Tony, you're a wonderfully sick man.

Sellam Ismail Vintage Computer Festival
International Man of Intrigue and Danger
Received on Mon Dec 04 2000 - 14:14:04 GMT

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