Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!gca!beaulieu
From: beaulieu@gca.UUCP (Larry Beaulieu)
Newsgroups: comp.sys.dec.micro
Subject: Re: Unix (or flavor thereof) for PDP 11/23 (18 bit backplane)
Summary: What if you already HAVE the 11/73?
Message-ID: <333@gca.UUCP>
Date: 17 Mar 90 15:32:13 GMT
References: <Added.sZxUIg200jZd49g096@andrew.cmu.edu> <10394@rls.UUCP>
Organization: GCA Corporation, Andover Mass
Lines: 42

In article <10394@rls.UUCP>, randy@rls.UUCP (Randall L. Smith) writes:
 
> The 73 is a better machine though. 

 Usually, if you take advantage of it; but not always if you're doing
 'real' real time - the cache will kill you if you're not careful.
 In those cases, you will usually get a more deterministic response (and save $$$)
 by using one of the non-caching CPU's - a MICRO-11/23/53/53+.

> 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.

	$4,200 for a 1 meg Q-bus memory board? Someone's a thief.

	Given that I have 11/53's (and an 11/73) spinning their wheels, 
	how DOES one go about getting a copy of 2.9/2.10 BSD?  How much 
	$$$ would it cost?  Not that it matters, but these guys are 
	currently running RSX-11M+ using I/D space.

	It would run on the following (approximate) configuration:

	11/53 w/2.5 MB memory (or 11/73 w/2 or 4MB in 11/53 chassis, in
		order to support 2 hard drives internally)

	Mix/match of 2 RD31/RD32 (RQDX3, natch...)

	RX50's or single RX33
 
	DEQNA

	TK50 (ugh!) and/or Cipher M880 w/Emulex TC02

	Emulex CS02 (maybe)

  Point me in the right direction and push me off; I'll take it from there
  when time permits...
-- 
Larry Beaulieu 				...uunet!gca!beaulieu	
SMTS/Software Engineer
GCA Corporation, 			"Live to step, step to live..."	
Andover, MA				The usual disclaimers apply.