Date   : Sun, 18 Feb 2007 10:24:05 +0100
From   : rhobbis@... (Richard Hobbis)
Subject: Screen garbage and program crashes

Richard Hobbis wrote:
>My 'new' Beeb appeared to work fine the first night I tried it, but now
>it is having 'issues'.
>
>For example, if I do a *CAT the file list will be displayed fine, If I
>do *CAT again, say two or three times, the listing gets corrupted.
>Sometimes it's as if I had done a *DIR G for example and all the files
>are prefixed with $. Other times not all the files are listed.
>
>If the disk does boot successfully into the menu and I select a game to
>play sometimes it will crash with a syntax error, other times it will
>just hang. If the game does load OK it might play for a couple of
>minutes before crashing, usually leaving it in mode 5 with keypresses
>going to screen. Sometimes the game loads but the screen text is garbled
>or random patterns appear.
>
>It is an issue 4 Beeb, with Watford DFS 1.44, Sir 12ROM board, and
>Cumana single 80track disk drive.
>
>Any ideas where the problem lies?
>
>Cheers
>Richard
>
>
>
I tried changing the power supply because it was getting very hot.
It seemed to work OK for the next half hour or so before I turned in for
the night, leaving it on and running Repton.
Next morning it had corrupted itself and the screen graphics were
complete garbage.

I'm thinking that there's a heat problem with one of the memory chips -
does this sounds likely?
Which chips should I try swapping out (hopefully they're socketed!)?

Cheers
Richard

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