[BBC-Micro] how can I test if the 1770 and 8271 disc interface are fully working?
tbkc at hotmail.com
Sat Dec 9 22:07:23 GMT 2006
> > 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
> > 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
>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
>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
fROM PAST EXPERIENCE, A ROM MAY SEMM TO WORK PERFECTLY, CAN DO THE USUAL
THINGS, BUT ITS WHEN YEARS DOWN THE LINE YOU NOTICE A PROBLEM EG A
PARTICULAR PROGRAM MAY NOT WORK(JUST 1 FROM OVER 200) OR THE CHECKSUM GIVES
A DIFFERENT VALUE.
SO JUST BECAUSE A ROM APPEARS TO BE FINE, IT DOESN'T MEANT IT'S ACTUALLY
Windows Live Messenger has arrived. Click here to download it for free!
More information about the bbc-micro