6 Sep
2008
6 Sep
'08
8:23 p.m.
Hey all --
Got my hands on a pair of Nuclear Data ND-812's (thanks, Mike!) and I'm
looking for any info/software for them. I've got the stuff off of
Bitsavers already :). 12-bit machine from ~1971, toggle switches and
blinky lights.
Actually, these are BR2412s -- evidently military versions of the
ND-812. They're green :). The other major differences (from glancing
through the maintainance docs on Bitsavers and comparing to mine) are
that the ND-812 used core memory, and the machines I have use DRAM
(Looks like 24kw of Intel 1103's!). And as a result the BR2412 has a
completely different power supply, which I'd love to have information
for so I can test it out before powering these things on. And I assume
the color scheme was different :).
Anyone know the history of this machine (or even the company itself?
Did they make any other computers?) I can't find too much information
on the 'net...
Josh
7 Sep
7 Sep
12:57 p.m.
Replying to my own post, mostly 'cause it's been almost 18 hours and my
original post seems to have gotten lost on its way to the list, but also
because I found two additional things:
- the BR2412 is not a military computer, it's the Bunker Ramo version of
the ND-812 which was probably used in retail establishments.
- The BR2412 has what looks to be a lead-acid battery, presumably used
to maintain the contents of the DRAM when power is turned off (so it'll
act more like core memory, presumably).
Anyone know anything else about these things?
Thanks,
Josh
Josh Dersch wrote:
Hey all --
Got my hands on a pair of Nuclear Data ND-812's (thanks, Mike!) and
I'm looking for any info/software for them. I've got the stuff off of
Bitsavers already :). 12-bit machine from ~1971, toggle switches and
blinky lights.
Actually, these are BR2412s -- evidently military versions of the
ND-812. They're green :). The other major differences (from glancing
through the maintainance docs on Bitsavers and comparing to mine) are
that the ND-812 used core memory, and the machines I have use DRAM
(Looks like 24kw of Intel 1103's!). And as a result the BR2412 has a
completely different power supply, which I'd love to have information
for so I can test it out before powering these things on. And I
assume the color scheme was different :).
Anyone know the history of this machine (or even the company itself?
Did they make any other computers?) I can't find too much information
on the 'net...
Josh
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