I'm afraid it goes a little beyond environmental monitoring. Remember that blue Fuel prototype I've got here? It's got old L1 firmware. I don't really care, but it was complaining about it at startup so I thought I'd fix that. Did that, and it was dead.
Hooked up an L1 serial cable, got L1 prompt (phew!), did 'pwr up' and, I kid you not, it said something along the lines of "No suitable power supply found".
I rebooted the L1 in the alternative flash bank and everything worked again. Lesson learned: there's some sort of ID in the PSU to identify it to the L1 via i2c or similar and without it you get nothing. You need a real Fuel PSU.
Now this is a deep dark secret, so everybody keep it quiet
It turns out that when reset, the WD33C93 defaults to a SCSI ID of 0, and it was simpler to leave it that way... -- Dave Olson, in comp.sys.sgi
Currently in commercial service:
In the museum
: almost every MIPS/IRIX system.Wanted
: GM1 board for Professional Series GT graphics (030-0076-003, 030-0076-004)