Ah, Saturday. Time to sit down and play with this PowerPC board. I installed a series resistor so the COP port on the board is supplying IO power (3.3V) and fired everything up. But Commander gives me the dreaded 03; cable disconnected error. If I query registers, I get either all 0s or all 1s (randomly, it seems).
The only thing I can do is reset - that DOES work, so I know the interface is basically supplying the right signals.
There is a jumper on the Wiggler board with RD and WR positions; I've tried shorting both and neither way makes a difference.
There is also space on the target board for pullup resistors on four of the COP port pins; are these required?