[pups] Bringing up the fist C compiler
iking at microsoft.com
Fri Sep 6 01:36:48 AEST 2002
About a thousand years ago, I recall hand-building programs for 8-bit microprocessors (in what we'd call embedded systems today). In many cases, I was the "assembler", writing directly in machine code which was then either keyed in through front-panel switches or burned into a PROM.... -- Ian
From: Johnny Billquist [mailto:bqt at update.uu.se]
Sent: Thu 9/5/2002 5:05 AM
To: Tim Bradshaw
Cc: pups at minnie.tuhs.org
Subject: Re: [pups] Bringing up the fist C compiler
On Thu, 5 Sep 2002, Tim Bradshaw wrote:
> * Johnny Billquist wrote:
> > How? It was written, of course. In assembler. By that time, you already
> > had the assembler, an editor, and other commonly used system programs, so
> > it's just a case of the normal development cycle.
> Is this known or is it deduction?
Ah. Ok, now I understand what you're asking for.
You want to know what the first C was written in, and what that
compiler/assembler was written in/on, and so on...
No, I'm just deducting. Since the reference posted said that TMG was the
first higher level language implemented, it follows that it must have been
written in a low level language, namely assembler.
Admittedly, the PDP-7 TMG *could* have been written in some high level
language on some other machine using some tool that made a PDP-7
executable, so your guess is as good as mine.
But even though I cannot account for all steps, I can guarantee that at
the end of the chain, you *will* find assembler.
I guess my MACRO-11 implementation of C isn't good enough. :-)
(Well, it ain't mine, it's the normal DECUS C, but I'm hacked some at it.)
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
PUPS mailing list
PUPS at minnie.tuhs.org
More information about the TUHS