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From: sdl@MITRE-BEDFORD.ARPA (Litvintchouk)
Newsgroups: net.lang.ada
Subject: Required values of DURATION'SMALL
Message-ID: <8606240113.AA01489@mitre-bedford.ARPA>
Date: Mon, 23-Jun-86 21:13:31 EDT
Article-I.D.: mitre-be.8606240113.AA01489
Posted: Mon Jun 23 21:13:31 1986
Date-Received: Wed, 25-Jun-86 06:31:14 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The MITRE Corp., Bedford, MA
Lines: 20


The Ada LRM (section 9.6) states, "...the smallest representable
duration, DURATION'SMALL must not be greater than twenty milliseconds
(whenever possible, a value not greater than fifty microseconds should
be chosen)."

What is the rationale behind the choice of values like "twenty
milliseconds" and "fifty microseconds"?  Was there a real reason for
these restrictions, or were the values just "picked out of the air" as
seeming reasonable?


Steven Litvintchouk
MITRE Corporation
Burlington Road
Bedford, MA  01730
(617)271-7753

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