On 3/21/2014 9:31 PM, monahanz wrote:
Has anybody in this group had experience in the past programming simple
GAL’s.
I helped some of the folks recreating the Heathkit H89 with more modern
parts a few months ago.
The original H89 used fusable link PROMs as decoders - which are mostly
unobtainable or expensive. I redesigned the logic so that we could use a
bunch of GAL16V8s.
I uses the PALASM4 Ver 1.5 from:
http://www.engr.uky.edu/~melham01/ee481/software.htm
I also used DOSBOX.
I don't see anything wrong with your design.
I don't think PALASM4 supports GALS. Somehow the person that built the
board converted from 16L8 format to 16V8 format.
I wouldn't assume that a .JED file for a 16L8 would work with a 16V8.
The JED file is a fusemap.
Also different manufacturers have different programming algorithms.
What part are you using, exactly?
Rob.
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