From: bqt@update.uu.se (Johnny Billquist)
Subject: [pups] PDP-9?
Date: Sun, 18 Aug 2002 20:04:41 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.21.0208182002240.5130-100000@Tempo.Update.UU.SE> (raw)
In-Reply-To: <1029663837.3d5f6c5d30faa@w3.fwn.rug.nl>
On Sun, 18 Aug 2002, Lars Buitinck wrote:
> we all know that UNIX first ran on the PDP-7 and then on the PDP-11/20,
> but does anyone know anything about PDP-9 UNIX? it\'s mentioned in \"The
> UNIX Time-Sharing System\" in the V7 manual:
>
> \"The earliest [version of UNIX] (circa 1969-70) ran on the Digital
> Equipment Corporation PDP-7 and -9 computers.\"
Hmmm, I cannot exactly answer that, but the PDP-7 and PDP-9 were both
18-bit machines, and somewhat compatible, I believe.
The whole line is (I believe):
PDP-4 -> PDP-7 -> PDP-9 -> PDP-15
So I guess that if you had it running on a PDP-7, you could probably
almost take the code unmodified and run it on the PDP-9.
The PDP-15 have a different bus (Unibus?) I believe, and thus,
peripherials are different from the predecessors.
This obviosuly affects the OS. :-)
Johnny
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
next prev parent reply other threads:[~2002-08-18 18:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-18 9:43 Lars Buitinck
2002-08-18 18:04 ` Johnny Billquist [this message]
[not found] <Pine.BSI.4.44.0209021059540.21824-100000@eram.esi.com.au>
2002-09-02 1:38 ` Johnny Billquist
2002-09-02 1:54 Norman Wilson
2002-09-07 1:49 ` Greg Lehey
2002-09-02 7:13 Fred N. van Kempen
2002-09-02 8:00 ` Warren Toomey
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