6 Mar
2021
6 Mar
'21
6:13 p.m.
On 3/6/21 9:59 AM, Scott Quinn via cctalk wrote:
Realized I didn't post the project I was looking
at just in case others
were interested:
https://tudl1910.home.xs4all.nl/rshockley.dyndns.org/indigo.htm
Converter to use PS/2 keyboards with SGI Indigo, Onyx, Crimson and 4D
series machines.
Not my page, not my project, not my work (yet).
Way overkill for the job, IMHO. Drop the crystal and use a smaller 8
pin PIC12 MCU--the internal RC clock is more than good enough.
It should be possible to do the same using a Blue Pill cheapie and
MAX232 level shifter. Still if this is a one-off, I doubt that it
would matter to the user.
FWIW, I did the PC AT/PS2 to PC XT keyboard converter years ago using
the cheapest PIC I could find--a 12F629--and I still had program memory
left over. A cap, a diode and a resistor were the only external components.
--Chuck