Heathkit H89A

From: Dwight Elvey <elvey_at_hal.com>
Date: Fri Dec 1 13:23:55 2000

Marvin <marvin_at_rain.org> wrote:
> I have a Heathkit H89A I acquired some years ago with a note attached "Bad
> keyboard encoder on terminal card." Is anyone here familiar with the
> keyboard encoder? I sort of recall reading somewhere that the keyboard
> encoder is not available anymore and before I start into this YAP (Yet
> Another Project), it would be nice to know if there is any hope of repairing
> this thing somewhat easily.

 I don't have my schematics handy but I would think
that the functions could be replaced by one of the
programable logic parts if it was a simple encoder
or a EPROM if it was a large translation table.
 How many inputs and outputs does it have?
Received on Fri Dec 01 2000 - 13:23:55 GMT

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