13 Nov
2008
13 Nov
'08
11:55 p.m.
On 14 Nov 2008 at 1:22, Daniel Seagraves wrote:
The first is the LVDC, the Launch Vehicle Digital
Computer, which flew
the Saturn booster. This is the one we are interested in. It was made
by IBM.
What I said before. The IBM docs for the LVDC are here and I would
encourage anyone who wants to offer a suggestion to reading the core
stack to read the document:
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19730063841_19730
63841.pdf
Even if you're not interested in recovering the LVDC core, the
document makes an extremely interesting read about the technology of
the time. One aspect in particular was the ability of the multiply
and divide instructions to run concurrently with other instructions.
Another aspect is the triple-redundant-with-voting structre of the
processor.
Cheers,
Chuck