HP-UX GSP Card - Power Mod
A while a go I picked up a GSP (Guardian Service Processor) PCI card for my HP-UX systems. If you don't know much about HP's PA-RISC systems, A GSP is a Lan console so you can connect to the Serial console via HTTP.
You'd expect that a PCI card would draw all voltage from the PCI bus... yeah ok wake me up when that happens.. HP in there smartness have used a little cable, good luck on finding out what or where it goes.
Its a power cable.. 5v exactly. I recently got hold of a HP J6750 (More on this later) and I wanted to make a mod to power it that was nice and clean. So I found the 5v and GND termination points on the SCSI backplane. Its nice and close to the PCI cage to! So I just soldered two wires.. easy as.
See images below of final product :

You can see all the pics of each part of the cable and backplane on my flicker