On Tue, 4 Jul 2000, Nelson H. F. Beebe wrote:
> However, Gary Kildall's CP/M did use 1A SUB for end-of-file marks, and
> as far as I know, Microsoft/IBM DOS borrowed that practice, and many
> other things, from it.
Correct. I think that CP/M got it from RT-11, the single-process PDP-11
OS that it resembled in many respects, which in turn inherited it from
OS/8. So evidently OS/8 was the source of the ^Z = EOF convention.
-- John Cowan email@example.com "You need a change: try Canada" "You need a change: try China" --fortune cookies opened by a couple that I know
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