"ikanja@yahoo.it" <ikanjaTOGLIMI@yahoo.it> writes:
Is it possible to hack a PC AT keyboard on a IIe? If it is, is there any
place where I could find detailed informations on doing that? I don't have
much hardware hacking practice(actually I don't have any at all :)
That was one of the items on my suggestions for Hardware Projects.
The ][/][+ is actually an easier one than the //e as the former has a
separate keyboard with encoder while the //e has a dumb keyboard with
the encoder on the motherboard.
My design would be a daughter board which would plug into the keyboard
encoder and keyboard ROM sockets on the mother board. Those chips would
be plugged into the daughter board along with a PIC chip programmed to
decode the PC/AT or PS/2 keyboard byte stream. This would allow the use
of both keyboards. Quick ASCII diagram:
+-------+ +-------+ +-------+
| KBD | | PIC | | KBD |
|encoder|-------| |-------| EPROM |--- motherboard
| | | | | |
+-------+ +-------+ +-------+
|
|
PC keyboard
OR
+-------+ +-------+ +-------+
| KBD | | KBD | | PIC |
|encoder|-------| EPROM |-------| |--- motherboard
| | | | | |
+-------+ +-------+ +-------+
|
|
PC keyboard
--
David Wilson School of IT & CS, Uni of Wollongong, Australia