It seems as though there was considerable interest in Porting Unix v6 to i386 some months ago. This is a project that appeals to me also. I was wondering if anyone has made any headway in the project and would like to share their experience.
Hi,
I have some RD54 drives (and maybe a RD53 or so) that I want to
part with. Free for a PDP user in the Netherlands who is willing
to pick them up in Arnhem (I won't ship them)
Wilko
--
| / o / /_ _ wilko(a)FreeBSD.org
|/|/ / / /( (_) Bulte Arnhem, the Netherlands
Bilquist said (quoting Buitinck):
> > 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. :-)
The 7, 9, 15 were very compatible. I think the -15
had some scheme for using an index register, which
the earlier ones didn't have, but it was otherwise
pretty much identical in IS architecture.
There was very little rewriting to try Unix out
on the -9 and -15; perhaps just some tweaks in
the disk device commands. I don't think the
system actually ran on either for more than a few
hours. Ken was just playing around.
The -15 may have had an electrically different
bus, but I'm reasonably sure it was not a Unibus.
All of them used IOT instructions, not memory-mapped
IO registers.
Both of the machines we tried were being used by other groups
and we couldn't squat on them as with the PDP-7.
I recall that the -15's main job was controlling a
step-and-repeat camera that exposed LSI masks.
Dennis
> To: pups(a)minnie.tuhs.org
> From: Dennis Ritchie <dmr(a)plan9.bell-labs.com>
> Subject: [pups] re: PDP-9
> Date: Tue, 20 Aug 2002 23:55:55 -0400
>
> Bilquist said (quoting Buitinck):
>
> > > 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. :-)
>
> The 7, 9, 15 were very compatible. I think the -15
> had some scheme for using an index register, which
> the earlier ones didn't have, but it was otherwise
> pretty much identical in IS architecture.
>
> There was very little rewriting to try Unix out
> on the -9 and -15; perhaps just some tweaks in
> the disk device commands. I don't think the
> system actually ran on either for more than a few
> hours. Ken was just playing around.
>
> The -15 may have had an electrically different
> bus, but I'm reasonably sure it was not a Unibus.
> All of them used IOT instructions, not memory-mapped
> IO registers.
>
> Dennis
What I remember, as the last gasp of PDP-15 production was a
dual-processor setup, linked with a PDP-11. The intent was to take
advantage of the lower-cost Unibus peripherals. I remember the
sales literature, but do not recall ever seeing one.
carl
--
carl lowenstein marine physical lab u.c. san diego
clowenst(a)ucsd.edu
This is a test message, please ignore it.
-- Tom
--
Tom Alsberg - certified insane, complete illiterate.
e-mail: <alsbergt(a)softhome.net>
Homepage: http://www.cs.huji.ac.il/~alsbergt/
* An idea is not responsible for the people who believe in it.
Dennis Ritchie said:
> The 7, 9, 15 were very compatible. I think the -15
> had some scheme for using an index register, which
> the earlier ones didn't have, but it was otherwise
> pretty much identical in IS architecture.
According to Gordon Bell's "Computer Engineering", the primary differences
from the -4 to the -7 were switching from 6-bit to ASCII I/O devices and
the addition of a trap mechanism. The -9 primarily changed the memory
system, going to 2-1/2D core; it was also microcoded. The -15 went to
TTL ICs and added index registers and memory relocation. He says
"The PDP-9 instruction compatibility was acheived with three minor
exceptions about which no complaints were received", although I don't
see an explanation of the exceptions.
http://research.microsoft.com/users/GBell/Computer_Engineering/
--
Roger Ivie
ivie(a)cc.usu.edu
Hey gang,
Does anyone have an online manual or other info for the DQ686
ESDI disk controller from Dilog? I'm trying to fix a VAX 4,
which as that beastie...
Thanks,
Fred
> From: "Fred N. van Kempen" <Fred.van.Kempen(a)microwalt.nl>
> To: <pups(a)minnie.tuhs.org>
> Subject: [pups] Dilog DQ686, anyone?
>
> Hey gang,
>
> Does anyone have an online manual or other info for the DQ686
> ESDI disk controller from Dilog? I'm trying to fix a VAX 4,
> which as that beastie...
There is a manual for the DQ696, which is essentially the same thing
except it controls 2 drives not 4. It was last seen by me at
< http://www.miim.com/documents/dilog/dq696.zip >.
It is zip-compressed MSWord.
carl
--
carl lowenstein marine physical lab u.c. san diego
clowenst(a)ucsd.edu
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.\"
--
If I travelled to the end of the rainbow
As Dame Fortune did intend
Murphy would be there to tell me
The pot is at the other end
Lars
Hi all
Firstly, I have done this before, but due to age/stress/tiredness/whatever,
I can't remember what I did!
I am using Warren's/Fred's vtserver program to install BSD2.11 on an 11/53.
I have installed the root.dump file (and all the steps beforehand) and now
my '53 boots into 2.11. So far so good!
I now need to restore the usr file systems - all the stuff in file6/7/8.tar
How do I do this still using Vtserver.
Someone remind me please!
Regards
Kevin Murrell
