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From: guy@rlgvax.UUCP (Guy Harris)
Newsgroups: net.micro
Subject: Re: Need PL/1 for 68010
Message-ID: <1191@rlgvax.UUCP>
Date: Fri, 23-Sep-83 01:53:12 EDT
Article-I.D.: rlgvax.1191
Posted: Fri Sep 23 01:53:12 1983
Date-Received: Mon, 26-Sep-83 00:02:32 EDT
References: <5493@sri-arpa.UUCP>
Organization: CCI Office Systems Group, Reston, VA
Lines: 16

One of TSI's customers for their 68K PL/I compiler is Stratus, the makers of
the multi-68000 failsafe system (cleverly done; they have two 68K's running
in parallel, doing the same computations in lockstep and comparing, I assume,
their pinouts.  You don't have to write special failsoft software.  If one
board with a pair of 68K's - four 68K's, actually, two for the OS and two
for applications - finds a miscompare, it gives up and lets another board
whose two 68K's have been executing the same application in lockstep with
this board's 68K's take over.).  Interestingly enough, the Stratus command
language looks suspiciously like that of another OS written in PL/I.  This
is not too surprising, considering that the principal author of the Multics
PL/I compiler, the principal author of the TSI PL/I compiler, and one of the
founders of Stratus are the same person - Robert Freiburghouse.  DEC's VMS
PL/I compiler is also based on the TSI compiler.

	Guy Harris
	{seismo,mcnc,we13,brl-bmd,allegra}!rlgvax!guy