21 Mar
1996
21 Mar
'96
3:44 p.m.
Forwarded message:
Subject: Re: UNIX for 11/23
To: sms(a)wlv.iipo.gtegsc.com (Steven M. Schultz)
Date: Thu, 21 Mar 1996 09:43:47 +0000 (GMT)
In-Reply-To: <199603202239.OAA28894(a)wlv.iipo.gtegsc.com> from "Steven M.
Schultz" at Mar 20, 96 02:39:32 pm
X-Mailer: ELM [version 2.4 PL23]
Content-Type: text
What about Digital's MV7 (or whatever it was called). This is
mentioned in the 11/23+ owners' manual as supported. Thus it must run
on the 11/23+ and support RD series disks. It is basically Bell Labs
version 7 I think.
Warren's correct. MSCP support did not enter the
'BSD' picture until
late 2.9BSD or early 2.10BSD. TMSCP support for tapes didn't come
about until early 2.11BSD when I "borrowed" the driver from 4.3BSD
(who had earlier borrowed it from Ultrix).
OK. I guess 2.x BSD (x>=9) requires separate I+D space? That would
rule out the 11/23+ I think.
It should be noted that the MSCP (and to a greater
degree TMSCP)
is a *pig* - it's the largest driver in the system, rivaling the
TTY subsystem sizewise.
Yes. I can believe that. Looks like writing my own driver would be no
fun at all!
An 11/23 is already extremely cramped for address
space even using
simpler/smaller drivers such as the RK, RL, etc. I seriously doubt
the MSCP driver could be smashed in to a 11/23 kernel and leave room
for too much else.
The 11/23+ has plenty of address space (22 bit), but mine only has 128Kw ...
Cheers,
Bob.
--
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rjm(a)swift.eng.ox.ac.uk Dept of Engineering Science
University of Oxford
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Robert Manners Osney Laboratory
rjm(a)swift.eng.ox.ac.uk Dept of Engineering Science
University of Oxford
01865 288762
Computer Museum: http://swift.eng.ox.ac.uk/rjm/museum.html
Also: http://swift.eng.ox.ac.uk
"The comfort you've demanded is now mandatory" - Jello Biafra
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From "Steven M. Schultz"
<sms(a)wlv.iipo.gtegsc.com> Fri Mar 22 02:31:20 1996
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Date: Thu, 21 Mar 1996 08:31:20 -0800 (PST)
From: "Steven M. Schultz" <sms(a)wlv.iipo.gtegsc.com>
Message-Id: <199603211631.IAA19050(a)wlv.iipo.gtegsc.com>
To: oldunix(a)minnie.cs.adfa.oz.au, rjm(a)swift.eng.ox.ac.uk
Subject: Re: UNIX for 11/23 (fwd)
Robert -
I beleive Digital's MV7 (I think) does support
RDs. It is mentioned in
the 11/23+ Owners Manual. I'll have to check. I guess this version
isn't in the archive ...
True - Ultrix-11 (what MV7 was called later on) does have MSCP
support in it. I've not looked at how they handle the rather
prodigious data space requirements (~2kb per controller) yet.
Cheers.
Steven
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