3 Feb
2004
3 Feb
'04
11:08 a.m.
On Tue, 2004-02-03 at 04:00, Fred N. van Kempen wrote:
Sorry, wrong. Unix was first written in assembler, then re-written in
BCPL and re-written again in C. I know that by v6 (1975) it was mostly
C with assembly for some of the things that couldn't or wouldn't work
well in C.
I don't know exactly when the transition to C happened but I think that
by the time it escaped from Bell Labs (v5) it was C.
--
TTFN - Guy
You can't
simply cross compile the "as" from 2.11BSD because it's
written in assembler. (but it sure looks like it was C at point)
No, UNIX as was
always written in assembler, although they did use
some tools to clean it up later on. Later (non-PDP11) versions were
in C, obviously.