9 Oct
2020
9 Oct
'20
12:48 a.m.
On Thu, Oct 8, 2020 at 3:39 PM Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
"Part" in this case is "part of the whole", not "computer
part"...
The part that is missing in that paragraph is code for Simh that
emulates a DEC sync serial board.
Real DEC sync serial boards aren't that hard to find because almost
nobody has a use for them.
From: Ethan
Dicks
a DEC sync serial board since that part is
nowhere to be found right
now.
I dunno, I see them fairly often on eBait (well, often compared to some other
things, e.g. TU56 parts... :-) QBUS or UNIBUS? And there are lots of different ones,
which I confess I don't
fully understand the difference between (e.g. DP11, DQ11, DU11, DUP11, DV11) -
some of it's single-line/multi-line, and DMA/programmed I/O, but from what few
details I looked at - while doing:
Yes. There are many varieties, both Unibus and Qbus. They have
different serial chips and different host-bus register sets, which is
why I said first one needs to identify which application is to be
used, _then_ choose which board to emulate (or purchase for real
hardware).
there are also differences in exactly which protocools
are supported,
etc, etc, etc, etc.
Yes. It all matters.
This stuff used to be hard. People used to give us $25,000 to solve
the problem.
-ethan