KayPro II keyboard schematic? - test-drb@ccmp.vtda.org

16 Dec 2007

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Subject: Re: KayPro II keyboard schematic?
   From: ard at p850ug1.demon.co.uk (Tony Duell)
   Date: Sun, 16 Dec 2007 22:17:22 +0000 (GMT)
     To: cctalk at classiccmp.org

   What was
used inside the Kaypro to receive the keyboard data?  
    Z80 SIO, at least on the -II and -4. 
Drat! It could be async or syunc, since that chip can be configured to 
handle eithr format. But I'll be t it's the former. 
Its async, I posted it was Async, SIO/DART yesterday. It's levels are 
TTL to save RS232 conversion and power needed for negative supply.
It's an easy keyboard to talk to via serial.

I have two Kaypros and a spare keyboard. its not rocket science.

Allsion

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-tony 