10 Mar
2009
10 Mar
'09
8:56 p.m.
I've just picked up an HP120 (Z80 CP/M machine) on Ebay :-). The main
prolem (mentioned in the listing I might add, so I am not complaining) is
that it's missing the keyoard.
The keyboard connector is a 6-pin telephone type socket (RJ12?). A quick
look inside (well, what did you expect) suggests the keyboard interface
is contrlled by an 8041 microcnntroller and that it works at 12V levels
(not RS232, but 0V and +12V). There are +12V and ground pins on the
keyboard socket.
So I am looking for any/all of the following :
1) The correct HP keyoard (anyone know the model number?)
2) Details of any other keyboards that can be got to work.
3) Technical details of the keyboard interface.
-tony