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Path: utzoo!linus!genrad!wjh12!n44a!dan
From: dan@n44a.UUCP
Newsgroups: net.micro
Subject: RE: PDT-11's
Message-ID: <165@n44a.UUCP>
Date: Tue, 14-Jun-83 14:28:41 EDT
Article-I.D.: n44a.165
Posted: Tue Jun 14 14:28:41 1983
Date-Received: Tue, 14-Jun-83 20:01:43 EDT
Lines: 26



	PDT-11's were DEC's early attempts towards office automation with
local clustered processors. There were three PDT-11's: 110, 130 and 150.
The PDT-130 has a LSI11 chip set (no EIS/FIS) together with up to 30k words
of memory (probably what was meant by 64k (bytes)) and a (parallel) TU58, all
packaged in a VT100.  It also had the options of up to 3 additional serial
interfaces plus a printer port. It had no Qbus and no further expansion
capabilities. So the idea was to run up to four terminals and a printer off
one PDT-130 cluster.
	The PDT-110 is a 130 without the TU58's. It had no mass storage and
was meant to accept programs downloaded from a host.
	The PDT-150 is a 130 without the VT-100 and the TU58's, but with
dual floppy disk drives.
	Both the 130 and 150 (the TU58 and floppy) ran I/O off a serial
protocol (similar to real TU58's). RT11 V4 supported PDT 130 and 150's.
You can actually run RT-11 with the KED screen editor off a PDT-130.
	The price of $2200 for a PDT is not a good one. You should be able
to get one (130 or 150) for $1300. (Try Newman computer). With the PDT-130,
you can strip out the PDT stuff and turn it to a regular VT-100, or a simple
program can be written for the PDT-130 to act like a VT-100.

						Dan Ts'o

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