CADR Smoke Test!

While working on the SDU program, I've also been cleaning and preparing the CADR for a power-up attempt. There's no means of removing the processor from the CADR, so the first power up was going to be an all-or-northing sort of thing - No checking the backplanes absent of cards first, because there aren't any! I did remove everything except the bus interface from the IO busses though, which does me little good since there's only one CADR processor and if it's toast, it's toast.

bus box with no memory

I removed the xbus memory cards because they are long and I worried they might fall - the top of the box is loose and lifts easily. The rest of the cards were just pulled clear of the backplane.

Then the Mighty-Mite and cleaned/repaired PDU were reinstalled...

Ready to go!

...and we are ready to go! First the fans were spun up, and a final check for any bent pins or obvious badness was made.

Fans spinning...

Then it was time to apply DC power! The CADR processor gives no visible indication of state - It powers up halted until told to do something by either the debugging interface, the console keyboard, or the Chaosnet. There is one LED that indicates DC power making it to the top of the processor, and that's it. I was either going to get bangs and smoke or a single red LED...

I got the LED!

...and there is that single red LED shining through the Lucite wire-wrap cover. No bangs, no smoke! No nothing else either though...

As the bus box still lacks fans, I had to power it down again here. I plan to try to access the debug interface via the Arduino to proceed from here, once I buy a new set of fans for the bus box.

Tags