Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!world!hal
From: hal@world.std.com (Harry A Levinson)
Newsgroups: comp.sys.dec
Subject: Re: PDP 11/34 Information
Message-ID: <1991May28.031247.20059@world.std.com>
Date: 28 May 91 03:12:47 GMT
References: <4362@meaddata.meaddata.com> <bqt.674958483@cia.docs.uu.se> <SPA.91May24170642@alfa.fct.unl.pt>
Organization: The World Public Access UNIX, Brookline, MA
Lines: 27

In article <SPA.91May24170642@alfa.fct.unl.pt> spa@fct.unl.pt (Salvador Pinto Abreu) writes:
>
>on 23 May 91 00:28:03 GMT,
>bqt@cia.docs.uu.se (Johnny Billquist) said:
>
>	[...]
>
>x> We have an 11/34 with RSX-11M running here.
>x> It has 1 meg of memory, 
>
>1Meg??? Are you sure it's an 11/34? I once ran such a beast (actually
>an 11/34a) and as far as I remember, having an 18-bit UNIBUS, it would
>only address 256Kb.
>

I believe ABLE or some other company once made an MMU/memory upgrade for
the PDP 11/34 that allowed it to go beyond the 256Kb limit.

There are also two companys that sell J11 based upgrades for the PDP-11 
Unibus systems providing more speed and 11/70 style MMU for running
System 7 (?) or whatever needs seperate I/D addressing and 4 Megs of memory.

	Nissho Electronics in CA
	Quickware Engineering & Design, Inc. in Mass  (I work here.)

harry levinson
hal@world.std.com