Date   : Thu, 17 May 2012 22:58:43 +0100 (BST)
From   : kim@... (Kim Faulkner)
Subject: Anyone know where I can get a 6522

Wookie,

Just wondered if you had downloaded the Master repair guide from Chris' Acorns
site.

http://acorn.chriswhy.co.uk/Computers/MasterComputers.html

Acorn Master Series Hardware Specification (Feb 86)

I think that there is some good info there with some more waveform measurements
that can be made as as final diagnosis before you comdemn the 6522.

If all else fails, I do have here a new R65C22 but I think it is my last one.
I may be persuaded to sell it, as these parts are now scarce, I would advise
removal of the old one without physically damaging it and then fitting a
socket. In that way, if the fault is not cleared, the original chip can be
refitted.

Keep us informed of how you get on.

Kim





On Thu 17 May, Wookie wrote:
> 
> Hi
> 
> Thanks for the advice offered, I'm going down the route that IC8 6522 is 
> toast.
> 
> Does anyone have a source of 6522 chips suitable for a master ?
> 
> Beebmaster doesn't list them, Sprow only has nmos versions, i've 
> searched fleabay with no success...
> 
> Thanks
> Howard
> -- 
> The problem with America is stupidity. I'm not saying there should be a 
> capital punishment for stupidity, but why don't we just take the safety 
> labels off of everything and let the problem solve itself?
> 
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