Cyber ECL Wiring

Jon Elson elson at
Sun Nov 30 10:50:58 CST 2014

On 11/29/2014 10:40 PM, Billy Pettit wrote:
> Chuck Guzis wrote:
> "It didn't start with the 170, did it Billy?  I remember a nice thick mat
> of twisted-pair wires on the backplanes of 6000s, as well as in a lot of
> attached controllers.  Taper pin technology."
> You're right - the 170 was the first use of main frame wire wrap at CDC.  I've never seen any other machine that used twisted pair wire wrap.
DEC KL10B had a lot of twisted pair wire-wrap on the 
backplane.  VAX 11/780 had
critical clock signals on twisted pair wire-wrap.  These 
were, in fact, ECL signals.


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