12 Jul
2019
12 Jul
'19
6:02 p.m.
On Thu, Jul 11, 2019, 12:31 Noel Chiappa via cctalk <cctalk at classiccmp.org>
wrote:
it's also possible that
since the -PA to -PV involved a faster clock, I wonder if some backplane
lines turned into twisted pair, or coax?
PA used 25 MHz (40 ns cycle). PV and PW used 33 MHz (33.3 ns cycle). I
don't think PA to PV required any signals that were previously single-ended
to change to twisted pair, or from twisted pair to coax.