RE: Re: Star Wars Self-Test

Okay... With a new 74LS244 piggybacked in 1K a lifted leg looks completely
different on the scope compared to the original chip... I don't get how
comes the self test still reports that everything is okay? Am I overlooking
something here? If I had a desoldering station I'd have replaced it by now,
but the messiness of clipping it out and the self test are stalling me!!!

Paul

-- ArcadeGeek.co.uk --

-----Original Message-----
From: owner-vectorlist@vectorlist.org
[mailto:owner-vectorlist@vectorlist.org] On Behalf Of peter jones
Sent: 07 September 2006 23:15
To: vectorlist@vectorlist.org
Subject: VECTOR: Re: VECTOR: Star Wars Self-Test

-----Original Message-----
From: "Paul Maddern" <paul@arcadegeek.co.uk>
To: <vectorlist@vectorlist.org>
Date: Thu, 7 Sep 2006 20:01:10 +0100
Subject: VECTOR: Star Wars Self-Test

>
> Hey All
>
> Just a quick question; my Star Wars PCB self-test reports all ROM and RAM
> okay, but how accurate is this?

it can test the program roms by reading them and generating a checksum,
it can test system ram by writing patterns to it and then reading back.
the sound board has it's own selftest.

one thing it cant test is the proms, and they fail a lot.

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Fri Sep 8 08:38:09 2006