[Coco] keyboard test

[Ciaran Anscomb]

Bob Devries wrote:
> Hi all.
> Is thre any utility programme which will test for a faulty keyboard?
> 
> I have fighting s couple pf Coco 3 keyboards which appear to be missing 
> a couple keys; always the same keys and different computers.
> 
> I believe it's to do with rows and columns and the PIA. he computers in 
> question have been in less than favourable conditions.

Fairly noddy tool, but I knocked this up to diagnose a weird
problem with my CoCo 3 keyboard:

http://www.6809.org.uk/dev/dunjunz/keyscan.wav

(In my case, column 7 is unrecognised if any other key in the same row
is pressed.  I really should get around to trying to fix that...)

..ciaran