Re: C64A 82S100 JED?

From: Francesco Messineo <francesco.messineo_at_gmail.com>
Date: Sun, 24 May 2020 19:01:49 +0200
Message-ID: <CAESs-_xj6u4onMxVtjGaAKSj3euqGKa5D=iKU+UacELcbK=FNw_at_mail.gmail.com>
Hi Dave,
the equations are available, I'd sincerely like to find the abel
program to obtain the proper jedec myself. I've seen that some of
the fuse map is bit-swapped on the jedec file available on zimmers.
I've checked against the partial other jedec map contained in pla.txt.
However not all fuse pairs are swapped, so I haven't still figured out
how to obtain a correct file. I have no "real" 82S100
to read with my 2900 to have the correct file.

On Sun, May 24, 2020 at 6:48 PM dave_m <dmercado11_at_att.net> wrote:
>
> Gentlemen,
> Another issue with that JED file is that there are no test vectors included
> in the file. That means there can be NO verification of proper output states
> after fusing. The Verification test may pass, but nothing is really tested.
>
> The output pins can not be tested by the PLA Programmer without test
> vectors. Any output pin may be dead and no one can tell after fusing.  The
> first 'test' then is when the PLA is placed on the board and run
> operationally.
>
> If someone has a Truth Table of the 16 inputs vs the 8 outputs for all 48
> Product Terms, the Test Vectors can be created.
>
>
>
> --
> Sent from: http://cbm-hackers.2304266.n4.nabble.com/
>
Received on 2020-05-30 01:49:29

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