On Sun, 17 Sep 2017, Rob Jarratt via cctalk wrote: > Many thanks for all the suggestions. I will go through them all, although it > may take me a while.... > > On your last point, at first I thought that there isn't any feedback from > the machine. However, apart from a DC OK (which will be an output), there is > a wire labelled "Warning", which could possibly be an input, so I will look > at that too.
That's pretty surely the PSU overheating status sent to the computer -- readable as the CSR register's PSWARN bit (bit #27) in the 5000/200 or signalled as the IOASIC interrupt (SIR register's bit) #4 in the 5000/240 and /260. Maciej
