Marvin <marvin(a)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.
Hi
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?
Dwight