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Date Posted: 18:45:59 01/20/02 Sun
Author: raza30
Subject: Re: What code with with 16F84 and PIU 1.0?
In reply to: Tom 's message, "Re: What code with with 16F84 and PIU 1.0?" on 20:29:38 01/13/02 Sun

the GILN18a code worked for me in my piu 1.0 board
but the picture has a little jitter, maybe is because
i am using a pic16f84a-04 rated a 4mhz.. it's been
hard for me to get the 20mhz version in my country
(Dominican Republic) I am in GI/Jerrold system..



>The board schematic calls for a SX-18 or a PIC16C54.
>The GILN18 code that is tested and known to work will
>not work with a PIC16F84. The GILN18a code was an
>attempt by Dan to use the PIC16F84. Nobody has
>specifically told me whether the code works or not,
>therefore I have not updated the Info Page. If you
>can, try a PIC16C54JW or SX-18 chip to see if you have
>a hardware problem or not. I believe Phil's code for
>Canton 4.2 with the 16F84 is known to work but I
>believe that Canton used different ports so that it
>will not work on a PIU board. It should be possible
>to modify that code to use the proper ports in the Piu
>board.
>
>The Piu board that I built had what I believe were
>design problems in the edge detectors and video buffer
>stages. I needed to make extensive changes to get it
>to lock and was never completely satisfied with the
>picture. My best board has been Canton's adjustable
>everything board but I have not built his newer boards
>yet.
>
>Troubleshooting these boards is pretty simple if you
>follow a logical plan. Let me know if you want any
>help. If you have a meter and a scope, it shouldn't
>be a problem. Troubleshooting code design problems is
>much more difficult and is easier with an analog dual
>trace delayed triggered scope and another 3chip that
>actually works and has test pulses to trigger the
>scope.
>
>Maybe someone else knows if Dan's port of Dave2's
>GILN18 code ever worked for the 18F84.

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