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From: i9577699 <i9577699@wsunix.wsu.edu>
Subject: gal20v8
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Date: Fri, 3 Mar 1995 12:46:36 GMT
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	I've been working with gal's in such specific uses, somehow, I 
seemed to have missed a little bit of info, that someone out there can 
certianly help me out with.
	I'm using a gal 20v8 simply to reduce a bunch of glue logic and 
control signals on a board down to one chip with a statement as follows 
in orcad......

	EPROM = ADR15' & ADR14' & ADR13' & (RD' # WR' # PSEN')

	My compiler sees this okay, and spits out the following lines..

EPROM 	ADR15' ADR14' ADR13' RD'
	ADR15' ADR14' ADR13' WR'
	ADR15' ADR14' ADR13' PSEN'

	where each line is summed (anded) and the lines collectivly are 
connected with and or.

	So far so good... the logic is correct, but when I actually 
program the part, and hook it up and test it by simply shoring wires to 
the vcc & gnd, only the top line will cause the output pin to triger, the 
lines concering WR' and PSEN' will not function at all.  I think the 
problem is that I am trying to operate the device without using the 
enable or the clock line????

	Any one out there got any ideas why this doesn't work???


	-Kenneth Y. Maxon
	"I used to trust the media to tell me the truth" - Geoff Tate

