15 Nov
2007
15 Nov
'07
8:11 a.m.
On Thursday 15 November 2007 02:48, J Blaser wrote:
of the
No, the "middle" slots of the backplane are different than the first and
last (UNIBUS IN/OUT) slots.
What you can do, however, is pull the M9202, and put the terminator in
its place (in the CPU backplane side, not the UNIBUS backplane side),
and just ignore the UNIBUS backplane entirely. That's probably the
best thing to do for now.
You'll want to get grant cards eventually, they're fairly common and not
too expensive. I've recently acquired a couple hundred (!) G727's.
Send me a message off-list if you want me to send you a 10 pack. :)
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
M9202 (Unibus 'joiner') in slots 19 and 20
M7485 (DZ11) in Unibus slot 21
<nothing> in Unibus slot 22
<nothing> in Unibus slot 23
<nothing> in Unibus slot 24
<nothing> in Unibus slot 25
<nothing> in Unibus slot 26
<nothing> in Unibus slot 27
M9313 (Unibus Term) in Unibus slot 28
You will need to have G727 or G7273 grant continuity cards in all empty slots. However, you should be able to do
some basic tests
Ah, I don't have any of those. Being a unibus noob, let me ask if I
can just move the M9313 terminator up, right 'behind' the DZ11,
and skip the empty slots? Or is there some 'special' wiring on the
unibus backplane. Admittedly, I've only worked with simple qbus
stuff to date, and a backplane with wirewraps all over it has me a
little nervous, to say the least. :)