From: lars@nocrew.org (Lars Brinkhoff)
Subject: [TUHS] PDP-11, Unix, octal?
Date: Mon, 16 Jan 2017 21:25:16 +0100 [thread overview]
Message-ID: <868tqau503.fsf@molnjunk.nocrew.org> (raw)
In-Reply-To: <20170116201543.GA16532@minnie.tuhs.org> (Warren Toomey's message of "Tue, 17 Jan 2017 06:15:43 +1000")
Warren Toomey wrote:
> I understand why other DEC architectures (e.g. PDP-7) were octal: 18b
> is a multiple of 3. But PDP-11 is 16b, multiple of 4. After all, Unix
> had its own assembler, so was there a need/reason to use octal?
Octal is a natural fit for the instruction set encoding.
next prev parent reply other threads:[~2017-01-16 20:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-16 19:10 [TUHS] Article on 'not meant to understand this' Steve Johnson
2017-01-16 20:15 ` [TUHS] PDP-11, Unix, octal? Warren Toomey
2017-01-16 20:25 ` Lars Brinkhoff [this message]
2017-01-16 22:31 ` ron minnich
2017-01-16 20:31 ` Erik E. Fair
2017-01-17 1:09 ` Steve Johnson
2017-01-17 1:33 ` William Pechter
2017-01-17 14:28 ` Joerg Schilling
2017-01-17 15:14 ` Nelson H. F. Beebe
2017-01-17 16:53 ` William Cheswick
2017-01-17 14:12 ` Joerg Schilling
2017-01-17 15:28 ` ron minnich
2017-01-16 20:45 Noel Chiappa
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