It was interesting others saying the floppies may have deteriorated. I tried some of my very first ones with dates from the early 90s and they all still worked.
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8 years ago
anybody still have a working BBC computer ?
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8 years ago
Old cassettes still work ok, even the earliest ones, where ok is as good as they ever did. The pads can deteriorate, the tape is still ok for playback, but less so for recording.
NT
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8 years ago
saw news today they are appealing for people to repair them ....
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8 years ago
Well, quite. Apart from any dedicated chips, they require no specialist techniques to repair.
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8 years ago
What if you have a RAM problem, I remmeber they were more diffcult to pinpoint which chip was faulty
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8 years ago
En el artículo , whisky-dave escribió:
You can disable alternative 16K halves of the RAM with a jumper which made it easier to locate the bank in which the faulty chip sits. Also, the 'back of a finger' technique is useful to find a chip running hooter than the others - that is usually the suspect one.
RAM faults on the BBC B were pretty rare - the most common faults IME were the 6522 VIA chips, often the one that provided the printer and user ports, as the I/O lines from the user port were presented unbuffered to the outside world and were prone to damage from people plugging stuff in with the machine powered on.
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8 years ago
A follow up .... in conclusion.
Contrary to what some though the magnetic media was fine, one of our erstwhile contributors took the disks from me - plugged them in and they read fine .... I now have all the files.
So 3.5" diskettes are certainly good after not being used for 27 yrs !
Storage was simply being stuck in top draw in my study.
Thanks also to the other members who offered to help - I took up the first responder :-)
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8 years ago
Not that rare I repaired quite a few, one of our studetns wrote a program t o dump a dot on the screen for every memeory location that was working wher e there was a gap you could work out what chip was at fault. CS1 & CS2 come to mind. I even have a couple of service manuals somewhere as I went on th e acorn servicing corse.
ours was the power supply and the RS423 chips.