Date   : Thu, 02 Nov 2006 22:03:29 +1200
From   : mjfoot@... (Michael Foot)
Subject: nutso keyboard decoding

In message <4548DAC1.5000805@...>
          Jules Richardson <julesrichardsonuk@...> wrote:

> 
> Whilst talking about sick beebs...
> 
> Has anyone ever come across a beeb fault where keyboard decoding was 
> completely messed up? Witchy over at Binary Dinosaurs has one (a model B) 
> where the key which appears on screen hardly ever matches the key actually 
> pressed, which is something of an odd fault!

I've not seen that type of fault before but my best guess would be that IC32
(74LS259) is faulty.

I've just uploaded a good list of common Model A+B faults and how to fix
them. This list used to be on the web but disappeared some time ago. I hope
the original author does not mind me making it available again.

http://homepages.paradise.net.nz/mjfoot/BBCFaults.txt

Cheers,

Mike.

-- 
Michael Foot <mjfoot(at)paradise(dot)net(dot)nz> *
http://homepages.paradise.net.nz/mjfoot/
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