From: Leah Neukirchen <leah@vuxu.org>
To: Norman Wilson <norman@oclsc.org>
Cc: tuhs@tuhs.org
Subject: Re: [TUHS] 1: jmp 1b
Date: Mon, 21 Oct 2019 16:05:17 +0200 [thread overview]
Message-ID: <87v9sinqhu.fsf@vuxu.org> (raw)
In-Reply-To: <1571578708.16814.for-standards-violators@oclsc.org> (Norman Wilson's message of "Sun, 20 Oct 2019 09:38:24 -0400")
Norman Wilson <norman@oclsc.org> writes:
> In `UNIX Assembler Reference Manual,' Dennis credits Knuth
> for numeric temporary labels, with a reference to volume 1
> of The Art of Computer Programming.
>
> I'm several thousand kilometers from my copy of Knuth (though
> rather nearer to Knuth himself, albeit not within asking
> range), so I'll leave it to others to track down the exact
> reference.
TAOCP 1 (1968), page 147:
"Local symbols have a different nature; we write, for example 2H
("2 here") in the location field, and 2F ("2 forward") or 2B
("2 backward") in the address field of a MIXAL line:
2B means the closest previous location 2H
2F means the closest following location 2H
[...]
The idea of local symbols was introduced by M. E. Conway in 1958,
in connection with an assembly program for the UNIVAC 1."
This is the originator of Conway's Law, btw. I could not find
more detail about this assembler.
--
Leah Neukirchen <leah@vuxu.org> https://leahneukirchen.org/
next prev parent reply other threads:[~2019-10-21 14:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-20 13:38 Norman Wilson
2019-10-21 14:05 ` Leah Neukirchen [this message]
2019-10-21 14:09 ` John P. Linderman
-- strict thread matches above, loose matches on Subject: below --
2019-10-20 0:36 ron minnich
2019-10-20 0:44 ` Warner Losh
2019-10-20 7:14 ` Angelo Papenhoff
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