On 4/18/2018 6:01 PM, Jules Richardson via cctalk wrote:
Hey all,
I snagged a Kaypro II a short while ago which I finally got around to
looking at. After some minor TLC to the drives, it's booting.
However, the keyboard appears unresponsive. Pressing keys (with the
exception of caps-lock, the two shifts, and ctrl) results in a
buzz/click from within the keyboard - if I'm interpreting the
schematics right, the click is actually driven by the system in
response to a keypress, which suggests that my keyswitches are OK (I
believe these use a foam disc approach, which are prone to
deterioration) and that keyboard data is being received OK (at least
on some low level).
Any suggestions for possible things to investigate? It doesn't feel
like a memory fault, given that it's using 64kx1 ICs and booting as
far as a prompt, but I suppose it's possible.
On the back of this, I'm in need of three keyswitches, if anyone
happens to have a parts machine and would be willing to sell any. A
student of the machine's previous owner dropped the keyboard years ago
and broke three of the keys off. I have the keycaps, but the switch
stems are broken and it would probably be easier to replace the entire
stem portions rather than attempting to glue things back together.
cheers
Jules
Can't help on the diag, but wanted to stay tuned in if keyswitches are
available. Been hunting for a few for a few years.
Jim
--
Jim Brain
[email protected]
www.jbrain.com
