I have a handful of small naked QBUS backplanes and recently I started
them. I quickly discovered that they have some signal requirements above
and beyond +5V/+12V, namely POK, DCOK and line clock.
So I created a simple PIC based PCB which provides DCOK, HALT and the
60Hz line clock.
I was inspired by some PIC source code I found by John Wilson which
generates the line
clock. My version generates the clock differently and includes DCOK and
push buttons. I must admit I had fun writing the software and debugging it.
I made four of these, and I need all four, but if people are interested
I can make
up a batch of 10 or so. Perhaps I am the only one who wants to run
backplanes with modern power supplies, but if not let me know. I would
that they would end up costing $15-20 if I make 10x.