5 Sep
2013
5 Sep
'13
12:04 p.m.
By the way, the M7014 and M7014-YA are only different in that the -YA has
on board terminators, I think.
One version of one of the boards (M7014?) had the GT40 firmware ROMs on
it too. nybble-wide PROMs, I forget how big (256 locations?). All the
boards had the positions for these ROMs, you can solder them in (or fit
sockets) if you wnt to. There may be some bufferes to add too, but it's
fairly obvious.
I can't rememebr about bus termination, if it was an option, it'll just
be a load of resistors to add I think
The VT!! backplane is the weirdest unibus backplane I ever saw. It's a 4
slot backplane with 3 hex boards in it, plus unibus in and out. Be very
careful installing it. Think about it...
Unibus In is in the normal place, Unibus Out is below it. So if it's the
last backplane in the syustem there's no problem, just put in the M920
jumber as usual and an M930 terminator in the slot below it. If it's the
last backplane in a cabinet, that's no problem either, again fit the M920
as usual and plug the Unibus ribbon cable going to the next box into the
Unibus Out slot under the M920. But if it's in the middle of a box, you
ahve to run a cable from the Unibus out slot to the Unibus In of the next
backplane.
-tony
Paul
On Thu, Sep 5, 2013 at 1:04 PM, Paul Anderson <useddec at gmail.com> wrote:
I have extra VT11s, but I'm also looking the
VR14 or 17. I have a VR12 but
I think it might have to get hacked to use on the VT11.
On Thu, Sep 5, 2013 at 12:18 AM, Richard <legalize at xmission.com> wrote:
I'm looking for a DEC VT11 and a
corresponding VR14 or VR17 monitor.
For those who are not familiar with them, a VT11 is a vector refresh
display processor for a UNIBUS PDP-11.
It consists of three hex-height modules M7013, M7014 YA and A320, a
custom VT11 backplane for these modules, an associated VR14 or VR17
monitor and cables from the modules to the monitor.
VT11 Graphic Display Processor
<http://manx.classiccmp.org/details.php/1,3136>
VR14/VR17 CRT Display Monitor User's Manual:
<http://manx.classiccmp.org/details.php/1,3271>
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