Date   : Tue, 05 Dec 2006 13:25:28 +0000
From   : astravan@... (Alex Taylor)
Subject: how can I test if the 1770 and 8271 disc interface

Peter Coghlan wrote:

> 
> Unless it was dropped very hard, the 8271 is not likely to be damaged
> much by the fall. It might have bent some of the pins. If the pins can be
> straightened out without breaking them, it should be ok.

Even then it might be ok. Many years ago I dropped an AMX Super Art ROM 
while riding a bicycle at 20mph, therefore breaking some of the pins 
off. I soldered on replacement pins from some broken ICs and it still 
worked fine.

I also once put a WordWise Plus ROM in backwards, on removal it was 
almost too hot to touch. It still worked when put back in the right way 
round.

And only a couple of weeks ago I accidentally put a 6502 in backwards 
while trying to fix my Beeb with a scrolling fault. That still works too :-)

-- 
Alex Taylor