29 Mar
2017
29 Mar
'17
2:35 p.m.
On 3/29/17 2:14 PM, David Bridgham via cctalk wrote:
And I think this picture is the smoking gun.
http://pdp10.froghouse.org/qsic/pic_24_2.gif
Again, the bottom trace is the CS signal in question and the upper trace
is now one of the QBUS DAL lines (after the bus transceiver and level
converter) that's running across the ribbon cable near the CS signal.
It does appear that induction can make a fairly clean square wave.
simple thing to try is split the ribbon cable between the two signals
