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From: gwyn%brl-vld@sri-unix.UUCP
Newsgroups: net.unix-wizards
Subject: Re:  Real-time needed; FTIME buggy. - (nf)
Message-ID: <12538@sri-arpa.UUCP>
Date: Wed, 12-Oct-83 21:38:15 EDT
Article-I.D.: sri-arpa.12538
Posted: Wed Oct 12 21:38:15 1983
Date-Received: Tue, 18-Oct-83 00:30:49 EDT
Lines: 14

From:      Doug Gwyn (VLD/VMB) <gwyn@brl-vld>

The UNIX kernel only updates its internal time counter on a clock
interrupt, usually every 1/60th of a second (maybe 1/50th or 1/100th
depending on your hardware).  There is no way it is going to be able
to tell you what time it is between "ticks".  You can buy a clock
peripheral from Digital Pathways (maybe other vendors too) and write
a device driver to interrogate it.

Sometimes you can output NUL characters to get small delays in
updating video terminal displays.

It would be interesting to hear what game you have that could take
advantage of high-resolution time on a time-sharing system.