David Riley wrote:
Also all of the PDP-10 backplanes, unless I heard
wrong. My '11
backplane (whose number I keep forgetting) is a PCB, but they kindly
left wire wrap stakes on the back so I could convert it to 22-bit.
The KL10 CPU
backplane is a PCB, with some of the wiring etched, and
some wire-wrapped. Since it's ECL, some of the wire-wrapped signals are
differential pairs, using twisted pair.