16 May
2016
16 May
'16
4:58 a.m.
On Mon, 16 May 2016, Josh Dersch wrote:
Then I think it's likely the machine actually wants a true PS/2 keyboard
in its native scan code set 3. So there's nothing wrong with your IBM AT
keyboard, and neither with your MIPSCO box, except that the two pieces are
incompatible with each other. And software doesn't bother to detect the
incompatibility -- as I recall an AT and a PS/2 keyboard can be told apart
by issuing the right command or sequence of commands to the device and
checking the response. I'd have to dig out my old code/notes to find the
details as I did such stuff back in mid 1990s.
Congrats on the trophy BTW -- as a MIPS person really I do recognise much
value in it and I'm glad such a system survived. I wonder how many RC6260
machines, if any at all, are still around. Live specimens, preferably.
Maciej
So it looks
to me like the first keyboard you've tried just suffers from
crippled firmware.
Well, in this case, I suspect the firmware in the MIPS -- the first
keyboard I tried was the original, official, IBM AT 84-key keyboard which
I'd expect to do things right :).