At 19:03 09-07-98 +0100, ard(a)p850ug1.demon.co.uk (Tony Duell) wrote:
--snip--
14. empty
Unibus output (you need a terminator and grant card here.)
No expansion backplane is installed presently. I think it may have been
taken out as there is reference on the module list printed on the CPU cover
which shows a 9-slot DD11-DK Unibus Expander Backplane installed in the
left side of the crate.
What does your 11/730 cabinet look like, then? Mine is a 10.5" box with
the backplane standing vertically in the middle. PSU on the right, cards
go in from the left. There's no room in mine for an extra backplane.
10.5"box? b/p standing vertical? PSU on right? Whoa, that must be something
different in a VAX 11/730.
Look at this URL for a picture of my 730:
http://www.dec-j.co.jp/ic/history/40th/vax.html
It's a Japaneese page, but there's some English text *and* a photo of my
730. The 780 is also shown on the right. It's cabinet dimensions are about
the same as the 40" mass storage unit cabinets and the 11/34A cabinet I have.
Interesting that the introduction dates show the 730 is fairly recent vs.
the 780. 1982 vs. 1977.
I have not dug into either of the BA11 crates I have in the pile yet but
would the 9-slot expansion backplanes in these actually be the DD11-DK? Is
"DD11-DK" marked anywhere on them?
Could be. There's a label on the side of the backplane that says 'DD11-DK',
you hope ;-). Some 9-slot backplanes were custom wired for particular
options, like RH11s or RK611s. DD11-DKs are just plain Unibus (SPC)
backplanes
Found a DD11-DK in an empty 10.5" BA11 crate. I think I recall seeing a
DD11 printset in the pile of docs (<g!>) so I'll check if it is
"standard"
as in "not modified". The modification sticker has an "E", I think,
marked
in a box.
For the sake of comparison with what the
factory-original module compliment
says, I will note in quotes ("") what's on the CPU cover label:
1. "Not used"
2. "M8389 FPA (Option)" (must be a floating pt. adaptor)
Yep, floating point board.
1. "M9202" (bridge from slot 14,
above) "G727"
M9202 = Unibus jumper?
Yep.
Regards, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA
Member of Antique Wireless Association
URL:
http://www.ggw.org/freenet/a/awa/