Re: CBM900 keyboard

From: Michał Pleban <>
Date: Sat, 12 Jul 2014 18:17:25 +0200
Message-ID: <>

Anders Carlsson wrote:

> The SWoC page actually mentions "AT keyboard jack". I would have thought
> it slightly predated the AT so it rather would be XT compatible, but I
> suppose not.

Actually the AT keyboard came out in 1984 whereas this computer was
developed in 1985.

The biggest obstacle is that the keyboard interface is nonexistent on
the schematic so nothing can be checked about it. I will try to check
the traces on the mainboard to see where they lead.

Plus it turned out to be very hard to find out a working MDA/Hercules
monitor so I cannot check the video output :-(

> whether or not every key from the
> original keyboard will be mapped is another question.

That could possibily fixed by a small PIC or AVR device, if only here
was any documentation on the original keyboard...


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Received on 2014-07-12 17:00:02

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