29 Jan
2005
29 Jan
'05
12:36 p.m.
All:
I'm working on another side project, a Mini-ITX conversion of a
non-working PCjr system. I don't have a keyboard for it, but I can choose
from wired or wireless PCjr or standard keyboards. For the wireless PCjr
keyboard, I don't have the thingey that would connect to the PC.
Has anyone ever tried to use the PCjr wireless keyboard on a modern
system? Any recommentations?
Be warned that the PCjr keyboard protocol is nothing like that of other
PC keyboards. The IR receiver in the PCjr is a simple, dumb device (the
schematic is in the TechRef) which feeds the signal into one of the 8255
lines and, IIRC, the NMI input of the 8088. I can find details of the
encoding if you want.
But I think it would certainly take a microcontroller to link it to a
normal PC keyboard port.
-tony