UNIX for 11/23 (fwd)

[Bob Manners]

Forwarded message:
Subject: Re: UNIX for 11/23
To: sms at wlv.iipo.gtegsc.com (Steven M. Schultz)
Date: Thu, 21 Mar 1996 09:43:47 +0000 (GMT)
In-Reply-To: <199603202239.OAA28894 at 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.
-- 

----------------------------------------------------------------------------
Robert Manners                                  Osney Laboratory
rjm at 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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-- 

----------------------------------------------------------------------------
Robert Manners                                  Osney Laboratory
rjm at 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
----------------------------------------------------------------------------