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From: mac@uvacs.CS.VIRGINIA.EDU (Alex Colvin)
Newsgroups: comp.arch
Subject: Re: Word and subword sizes (19 bits, ints from h*ll)
Message-ID: <1812@uvacs.CS.VIRGINIA.EDU>
Date: Fri, 24-Jul-87 16:21:47 EDT
Article-I.D.: uvacs.1812
Posted: Fri Jul 24 16:21:47 1987
Date-Received: Sat, 25-Jul-87 17:55:47 EDT
References: <132@watsol.UUCP> <3490005@wdl1.UUCP>
Organization: University of Virginia
Lines: 11
Summary: 19 bit machine?

Sometime back in the 60s, the Navy spec'd out a machine (a UYK?).
They'd figured  out  exactly how much they needed, and came up with a
19-bit word.  Some outfit named DDP designed it, called it the DDP-19.
Fortunately, it was never built.

Now the reason some of y'all ought to know this is becasue of what
became of it.  The company was bought by Honeywell.  The (least
significant) 3 bits were lopped off, and it became the Honeywell 116.
Later enhanced into the 316, 516 and 716.  All defunct.  Some folks ran
away with the 516 and formed Pr1me.  You can still see it in the
instruction set, the one with X and Y and little else.