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https://www.rcsri.org/library/
We're not trying to post a complete reference section, but a select
group of particularly interesting texts. Subjects include:
analog computers, Honeywell 316, LINC, TX-2, Multics, TOPS10, SGI,
Thinking Machines, etc.
An old mystery was solved for me while I was scanning the PB-250
manuals. The PB-250, a 22-bit delay-line memory minicomputer from the
early 60s, has almost no front panel. That's kind of weird, because
at that time pretty much all computers had a full set of lights
and switches to see and control what was happening in the cpu at the
absolute lowest level.
Then I ran across the section in the second volume of the
PB-250 Technical Manual which explains how to view to contents of a
register by hooking up an oscilliscope to the correct test points!
Vg Command Gate -
Displays the delay line the current instructions are coming from.
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