14 Nov
2008
14 Nov
'08
7:31 p.m.
Chuck Guzis wrote:
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.
Fun read, presents a good primer on basic core memory principles too.
I only wish it had gone into more detail about the physical implementation such
as the ICs used, as it would be interesting to compare with the AGC. The only
mention I found suggests some DTL-class series. That and the power supply
voltages suggest it might be the TI Minuteman (SN3xx) series.
Perhaps it's in Vol II (?)