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Re: A very basic printing question re XY3
- Subject: Re: A very basic printing question re XY3
- From: Harry Binswanger hb@xxxxxxxx
- Date: Thu, 04 Dec 2008 14:16:11 -0500
> Okay, what mainframe program was CP/M based on?
CP/M (Control Program/Monitor)
Wikipedia says: "Control Program for Microcomputers" which doesn't sound
*quite* right; I thought it was "Control Program/Microcomputers." But,
digging deeper, you are right. "In 1974 CP/M was a private project of Gary
Kildall, under the name "Control Program/Monitor". During the conversion of
CP/M to a commercial product, trademark registration documents filed in
November 1977 gave the product's name as "Control Program for Microcomputers."
was an operating system that ran
on Intel 8080 machines (although I ran Z80 boxes, which
understood the instruction set).
Me too. Northstar Horizon. Z80-A, IIRC.
Oh, you mean, "based
on"=derived from? The ancestral model? Why, IBM's CP/CMS, of
course! Gee, Harry...
Wikipedia: "CP/M's command line interface was patterned after the operating
systems from Digital Equipment, such as RSTS/E for the PDP-11." I thought
it was that or PL/P-1. But that's just the command-line interface. In
support of your view, it also states:
"The name shows a prevailing naming scheme of the time, as in
Kildall's/Intel's PL/M (Programming Language for Microcomputers) and Prime
Computer's PL/P (Programming Language for Prime), both suggesting IBM's
PL/I; and IBM's CP/CMS operating system, which Kildall used when working at
the Naval Postgraduate School, and which, like TOPS-10, has clear
similarities to the CP/M user interface and file system
> when you want to turn off the 8th bit, what is the switch for use
> with PIP?
The power switch?
That would do it. But I had in mind:
PIP NEWFILE=OLDFILE[Z
The closing bracket on switches turned out to be unnecessary (a little
known fact rather like the discovery that PFUN will do instead of PFUNC).
Harry Binswanger
hb@xxxxxxxx