Re: PLA replacement with 22V10

From: Ethan Dicks <>
Date: Tue, 26 Mar 2013 11:23:52 -0400
Message-ID: <>
On Tue, Mar 26, 2013 at 10:59 AM, Michał Pleban <> wrote:
> Hello!
> I was wondering, has anyone ever considered creating a PLA replacement
> with two GAL22V10 devices? This should be a rather straightforward task,
> and two such chips should easily provide enough input and output pins to
> replace the PLA. I am actually surprised that so far efforts to replace
> the PLA chip focused on EPROM or CPLD based solutions, but what about
> PAL/GAL? This is actually what the PLA itself is, anyway? ;-)

EPROM solutions are easy to implement - the PLA is essentially a
"fast" (by 1982 standards) EPROM, not a PAL/GAL.

I haven't memorized the access time of the 82S100, but an EPROM
with an equivalent (or better) value will drop in there nicely.  ISTR it
takes a 27C512 or so, but someone who's done it can certainly
quote exact values.


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Received on 2013-03-26 16:01:01

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