ISO: Keyboard/mouse for MIPS RC2030 workstation

Maciej W. Rozycki macro at
Mon May 16 06:58:25 CDT 2016

On Mon, 16 May 2016, Josh Dersch wrote:

> >  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 :).

 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.


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