25 Jun
2015
25 Jun
'15
10:38 a.m.
On Jun 25, 2015, at 1:02 PM, Noel Chiappa <jnc at
mercury.lcs.mit.edu> wrote:
That doesn?t seem likely. While DEC engineers on average didn?t understand transmission
lines as well as, say, Cray engineers, the definition of ?termination? is something that
you learn in EE 101 and are unlikely to forget.
paul
From: tony duell
...
> I was wondering if maybe the M9015 was an
M9014 with termination
> resistors, or something (the way the QBUS versions come with and with
> termination)
I would be very surprised. Unibus is normally
terminated at the ends
and not in the middle.
Right, but the very similar QBUS does have terminations (of a sort - the
rules for when you need terminations on QBUS extensions are so complex that I
don't really grok them yet) 'in the middle', so?