Re: V7M - TUHS

2 Sep 1999

V7M was the DEC distribution of V7 (pre Ultrix days). Fred Canter did
most of the work, along with Jerry Brenner and Armando Stettner. It
supported non ID space machines, and some of the newer DEC hardware.
My manual lists it as working with :-

CPUS:-	11/23, 34, 44, 45/50/55, 60 and 70
Disks:-	RL02, RK06, RK07, RM02/3, RP04/5
Tapes:-	TU10, TE10, TU16, TE16, TS11

There was a strip down of V6 called Miniunix that would run on machines
without memory management, such at the 11/20, 05, 10 and 35/40 (without MMU
option). It required a full 56Kb machine, used the first 28Kb for the kernel
and swapped the last 28Kb for each process. Pipes worked by using a temporary
inode to store the data and swapping the processes. It was realllllllll slow.

The was also a similar version for 11/03's. I remember that there was an early
bug in that updates would always rewrite open inodes (last access time had
changed). You could physically wear out a floppy disk, since it was forever 
rewriting the sector with the inode for the console terminal.

Received: (from major@localhost)
	by minnie.cs.adfa.edu.au (8.9.3/8.9.3) id QAA00853
	for pups-liszt; Thu, 2 Sep 1999 16:07:04 +1000 (EST)
...
 From Carl Lowenstein &lt;cdl(a)mpl.ucsd.edu&gt; Thu Sep 
2 16:06:50 1999 
Received: from mpl.ucsd.edu (chiton.ucsd.edu [192.135.238.128])
	by minnie.cs.adfa.edu.au (8.9.3/8.9.3) with ESMTP id QAA00845
	for &lt;pups(a)minnie.cs.adfa.edu.au&gt;; Thu, 2 Sep 1999 16:06:56 +1000 (EST)
Received: (from cdl@localhost)
	by mpl.ucsd.edu (8.8.8+Sun/8.8.8) id XAA06196
	for pups(a)minnie.cs.adfa.edu.au; Wed, 1 Sep 1999 23:06:50 -0700 (PDT)
Date: Wed, 1 Sep 1999 23:06:50 -0700 (PDT)
From: Carl Lowenstein &lt;cdl(a)mpl.ucsd.edu&gt;
Message-Id: &lt;199909020606.XAA06196(a)mpl.ucsd.edu&gt;
To: pups(a)minnie.cs.adfa.edu.au
Subject: Re: V7M
Sender: owner-pups(a)minnie.cs.adfa.edu.au
Precedence: bulk

...
  Subject: Re: V7M 
 cc: pups(a)minnie.cs.adfa.edu.au
 Date: Wed, 01 Sep 1999 16:44:29 -0700
 From: Kirk McKusick &lt;mckusick(a)flamingo.mckusick.com&gt;

 My recollection is that V7M stood for V7-mini. It was a
 striped down version of V7 that was designed to run on
 the very low-end PDP-11's (like the 11/20). 
Well, actually the M was for Modified.  Particularly modified to work
with some more DEC peripherals.

What ran on 11/20's was Mini-Unix, which was a stripped-down 6th
Edition.  By the way I'm not sure that the PUPS archive has a Mini-Unix
tape.  I have one, although it has not been read since the days when I
had an 11/20.

    carl

        carl lowenstein         marine physical lab     u.c. san diego
        {decvax|ucbvax} !ucsd!mpl!cdl                 cdl(a)mpl.ucsd.edu
                                                  clowenstein(a)ucsd.edu

Received: (from major@localhost)
	by minnie.cs.adfa.edu.au (8.9.3/8.9.3) id QAA00913
	for pups-liszt; Thu, 2 Sep 1999 16:11:58 +1000 (EST)
...
 From Warren Toomey &lt;wkt(a)cs.adfa.edu.au&gt; Thu Sep 
2 16:09:16 1999 Received: from henry.cs.adfa.edu.au (henry.cs.adfa.edu.au
[131.236.21.158])
	by minnie.cs.adfa.edu.au (8.9.3/8.9.3) with ESMTP id QAA00907
	for &lt;pups(a)minnie.cs.adfa.edu.au&gt;; Thu, 2 Sep 1999 16:11:51 +1000 (EST)
Received: (from wkt@localhost)
	by henry.cs.adfa.edu.au (8.9.2/8.9.3) id QAA00770;
	Thu, 2 Sep 1999 16:09:16 +1000 (EST)
From: Warren Toomey &lt;wkt(a)cs.adfa.edu.au&gt;
Message-Id: &lt;199909020609.QAA00770(a)henry.cs.adfa.edu.au&gt;
Subject: Re: V7M
In-Reply-To: &lt;199909020606.XAA06196(a)mpl.ucsd.edu&gt; from Carl Lowenstein at "Sep
1, 1999 11: 6:50 pm"
To: cdl(a)mpl.ucsd.edu (Carl Lowenstein)
Date: Thu, 2 Sep 1999 16:09:16 +1000 (EST)
Cc: pups(a)minnie.cs.adfa.edu.au
Reply-To: wkt(a)cs.adfa.edu.au
X-Mailer: ELM [version 2.4ME+ PL43 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-pups(a)minnie.cs.adfa.edu.au
Precedence: bulk

In article by Carl Lowenstein:
...
  Well, actually the M was for Modified.  Particularly
modified to work
 with some more DEC peripherals.

 What ran on 11/20's was Mini-Unix, which was a stripped-down 6th
 Edition.  By the way I'm not sure that the PUPS archive has a Mini-Unix
 tape.  I have one, although it has not been read since the days when I
 had an 11/20.
     carl 
Yep, it's in Distributions/usdl/Mini-Unix. It's not in the research/
dir because it was not done in the labs, but elsewhere.

Cheers,
	Warren

Received: (from major@localhost)
	by minnie.cs.adfa.edu.au (8.9.3/8.9.3) id SAA00659
	for pups-liszt; Thu, 2 Sep 1999 18:07:17 +1000 (EST)
...
 From Anders Magnusson &lt;ragge(a)ludd.luth.se&gt; Thu
Sep  2 18:05:23 1999 Received: from zed.ludd.luth.se (zed.ludd.luth.se
[130.240.16.33])
	by minnie.cs.adfa.edu.au (8.9.3/8.9.3) with ESMTP id SAA00643;
	Thu, 2 Sep 1999 18:05:30 +1000 (EST)
Received: from father.ludd.luth.se (ragge(a)father.ludd.luth.se [130.240.16.18])
	by zed.ludd.luth.se (8.8.5/8.8.5) with ESMTP id KAA22337;
	Thu, 2 Sep 1999 10:05:25 +0200
From: Anders Magnusson &lt;ragge(a)ludd.luth.se&gt;
Received: (ragge@localhost) by father.ludd.luth.se (8.6.11/8.6.11) id KAA11504; Thu, 2 Sep
1999 10:05:24 +0200
Message-Id: &lt;199909020805.KAA11504(a)father.ludd.luth.se&gt;
Subject: Re: KDA50 woes
To: quasijarus(a)minnie.cs.adfa.edu.au
Date: Thu, 2 Sep 1999 10:05:23 +0200 (MET DST)
Cc: pups(a)minnie.cs.adfa.edu.au, quasijarus(a)minnie.cs.adfa.edu.au
In-Reply-To: &lt;9909020115.AA00610(a)meson.jpsystems.com&gt; from Michael Sokolov at
"Sep 1, 99 08:15:23 pm"
X-Mailer: ELM [version 2.4ME+ PL15 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-pups(a)minnie.cs.adfa.edu.au
Precedence: bulk

...
  Hi,

 I wonder, does anyone here know anything about the KDA50? I've solved my RA72
 Well, something I think... :-)

[...]
...

 So my questions to the folks are: First, is my understanding of the situation
 correct? Second, what can be done about it? I guess as a temporary solution I
 can remove this problematic IPL autodetection code and hard-code the IPL of my
 KDA50, but what is it? Is the IPL set with switches on the KDA50 or how? And
 what do the KDA50 switches do in the first place? Does anyone know? TIA.
  The IPL autodetect code has seemed to me as unneccessary. You know that
the KDA50 will always interrupt at spl5, so you can hard-code it in
the interrupt driver and nuke the autodetect code. The same with the 
other drivers that can be on Qbus:

	if (uh->uh_type == QBA)
		spl5();

-- Ragge