Re: Lunar Lander 'lightning' display

-----Original Message-----
From: Phil Morris <phil@morris0.fsnet.co.uk>
To: vectorlist@synthcom.com
Date: Sat, 23 Feb 2002 15:06:03 +0000
Subject: VECTOR: Lunar Lander 'lightning' display

>
> Some of you may recall that a few days ago I posted a message here about my
> Lunar Lander board that WAS working in test mode but now has a corrupted
> display.
>
> A picture can be seen here:
>
> http://www.morris0.fsnet.co.uk/ll_disp.jpg
>
> Just to keep the testing simple it's only running with the B1 EPROM and the
> screen is even more mangled with 'lightning' (AND the text that should be
> there) with the others inserted - the square box with the cross is, as
> you'll probably know, because I don't have N/P3 installed. Installing R3
> though causes the screen to go completely blank! The screen as you see it
> flashes very rapidly, and the diagonal lines you see also scroll rapidly in
> roughly the area you see them covering in the picture. As noted, the
> display is worse the more ROMs that are inserted with more 'lightning'
> covering larger areas of the screen, more jagged, angled lines, etc.
>
> What is even more curious is that the second Lunar Lander board I have
> (from the same source) has EXACTLY the same problem.
>
> The RAM passes it's self-tests but I swapped the Vector RAM on one board
> anyway to no avail.
>
>[crap cut to save space]

Are you using the original SHIT atari chip sockets?
these are the most common cause of probs with atari pcb's.

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Received on Sat Feb 23 17:53:03 2002