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Article View: comp.sys.dec.micro
Article #1902

Re: Unix (or flavor thereof) for PDP 11/23 (18 bit backplane)

#1902
From: Randall L. Smith
Date: Fri, 09 Mar 1990 22:15
43 lines
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In article <Added.sZxUIg200jZd49g096@andrew.cmu.edu>, uahfxg01@ASNUAH.ASN.NET ("FRANK GOSSETT") writes:
> Does anyone know of a version of Unix that will run on a PDP 11/23
> with 256 RAM and 2 RLO2s.  I've received this machine with an old RT11
> version on it and don't feel up to learning this OS.

Aw, come-on...  You got something against Artie's (RT's) three letter
commands? :-)  And they say Unix is cryptic.  Sheesh.

> Someone suggested I upgrade it to an 11/73 and possibly run bsd's 
> public domain version (2.1 I think).  Who should I contact about
> this bsd information and approx. how much would an upgrade to an 
> 11/73 cost?

This will cost you a bundle as you have an 18 bit backplane and the 73 is
a 22 bit backplane.  If you had a 23 Plus it would be more reasonable. 
Only the cost of the board swap.  The 73 is a better machine though. 
Maybe cost you $2,500, US just for a used processor board, KDJ11-BB in
Digital Basics.  Now add $4,200 for a meg of memory...  Hope you like
segmented architecture, cause thats all ya get.

A whole box maybe $5-$6K.  Oh, you want a disk....
 
> I would prefer to run Unix on the system as is if possible. 

Good choice.

> Is it worth the time and effort to investigate these questions?

Probably not as they suck power like there's no tomorrow.  You could pick
up a nice 386 with scads of memory and disk for the same price with a CPU
thats three times as fast with virtual memory.  No contest.
 
> Thanks,

De nada.

Cheers!

- randy

Usenet: randy@rls.uucp 
Bangpath: ...<backbone>!osu-cis!rls!randy
Internet: rls!randy@tut.cis.ohio-state.edu
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watserv1!watmath!iuvax!cica!tut.cis.ohio-state.edu!rls!randy
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watserv1!watmath!iuvax!cica!tut.cis.ohio-state.edu!rls!randy
From: randy@rls.UUCP (Randall L. Smith)
Newsgroups: comp.sys.dec.micro
Subject: Re: Unix (or flavor thereof) for PDP 11/23 (18 bit backplane)
Summary: It will cost ya a bundle.
Message-ID: <10394@rls.UUCP>
Date: 9 Mar 90 22:15:33 GMT
References: <Added.sZxUIg200jZd49g096@andrew.cmu.edu>
Organization: The Internet
Lines: 43