> Probably a good first step would be to try and tackle one of the older 
> Personal Iris systems using a serial console.  Now, if you can just find 
> some documentation on where all of the hardware lives.... :-)

Actually, some of the header files in /usr/include/sys in an IRIX
installation include lots of explicit memory-map info, register bits, etc.

(Just in case anybody didn't know, the various Iris 4D-series machines
use various MIPS processors from the R2000 to the R10000, and most of
the ones in between - except the R6000 of course...)

-- 
Scott Telford, Edinburgh Parallel Computing Centre,        <s.telford@ed.ac.uk>
University of Edinburgh, Mayfield Rd, Edinburgh, EH9 3JZ, UK.(+44 131 650 5978)
 "Is it a virus, a drug, or a religion?" "What's the difference?" (Snow Crash)