PDP-6s at MIT

Phil Budne phil at ultimate.com
Thu Dec 29 12:33:39 CST 2016

> From: Lars Brinkhoff <lars at nocrew.org>
> This document says MIT's Lab for Nuclear Sience was busy working with
> their PDP-6 in early 1970.  So that could not be the used machine the
> DynaMod group got in late 1969.  That is, if those dates are accurate.
> http://cds.cern.ch/record/862545/files/233.pdf

The report mentions rearranging the core boxes (to be able to
interleave the two pairs of faster memories) in January 1970.  The
conference date is March 1970, and it says they were "presently"
upgrading to a PDP-10, so maybe there were three on campus for a brief

The table "Figure 4" is interesting: It shows they were able to do
scans 75.5%, 72.2% and 82.3% of the time in three months.

More time was lost due to Film Change, PEPR (Film scanner) trouble,
Magnetic Tape unit trouble (in increasing order) than due to the PDP-6
CPU; They must have gotten a GOOD one!!

I've converted my notes at http://www.ultimate.com/phil/pdp10/pdp6-serials.html
to HTML, and added some (but not all new info) from the current discussion.

The invoice dates come from a document about core memory royalties but
I didn't note a URL....

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