OT: old computer facts [was:Re: A very basic printing question re XY3]

[David Auerbach auerbach@xxxxxxxx]

And what was the initialization instruction for the IBM1620? (which I
typed in hundreds of times back in 1963)

On Dec 4, at 1:23 PM, Robert Holmgren wrote:
** Reply to message from Harry Binswanger  on
Thu, 04 Dec 2008 11:45:19 -0500
Okay, what mainframe program was CP/M based on?

CP/M (Control Program/Monitor) was an operating system that ran
on Intel 8080 machines (although I ran Z80 boxes, which
understood the instruction set). Oh, you mean, "based
on"=derived from? The ancestral model? Why, IBM's CP/CMS, of
course! Gee, Harry...
when you want to turn off the 8th bit, what is the switch for use
with PIP?

The power switch?

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Robert Holmgren
holmgren@xxxxxxxx
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David Auerbach
Department of Philosophy & Religion
Box 8103
NCSU
Raleigh, NC 27695-8103