23 May
2016
23 May
'16
6:38 a.m.
So I decided to insert two 32K core memory
backplanes
32KW, those would be MM11-U backplanes, right?
My plan is to replace the solid-state RAM card
with core, and this
will
free up a slot on the 4-slot backplane for a
terminator.
Terminators all only go in the last slot of the last backplane anyway
(either
that, or a UNIBUS 'out' cable), so adding extra backplanes shouldn't give
you
"a slot .. for a terminator".
Also, Paul's point is a good one: the hex memory
cards need so-called 'MUD
slots' (hex), not SPC slots (quad), and only (IIRC) the DD11-C/D have MUD
slots. (Those came in with the 11/04-34, IIRC).
It is 3011-cf / 70-12445 1979
the serial
card seems to have stopped working. It appears that the
console program is being loaded and runs from the M9312 but nothing
is
appearing on the terminal. I cannot send an
"A" to the terminal, the
most basic test I can think of.
Hmm. You can read/write the console registers from the console, though, it
sounds like? My guess would be that if your serial port is EIA, somehow
you're missing -15V or something on the DD11 in its new location. Study the
-11/35-40 system manual to learn about which 'bricks' supply which voltages
to which system units.
And while you're at it, check that you have the
right 'bricks' for the
MM11-U.
The -11/35-40 system manual has lots of text on how to support the MM11-U.
Can you only use the core backplanes for core
memory (assume yes), or
are they capable of holding other types of cards temporarily?
AFAICR, the MM11-U backplane does _not_ have an SPC
slot in it. IIRC, the
16KW MM11-U board set is a quad controller board, and 3 hex boards (core,
X-Y
and something else). So two sets (the backplane holds two) would be 8, so
one
empty slot - which IIRC is blank. Check the MM11-U manual, it's available.
Came with M7891 RAM installed in the 3011-cf backplane.
I have one
slot that needs the npg, it's in place.
??? _Every_ SPC/MUD slot which does not have a DMA device in it _must_ have
the jumper on the backplane (or the _double_ width UNIBUS grant card, whose
number escapes my memory, which contains a NPG jumper). Not sure if that
was the import of what you wrote there.