Document the DELAY() function.

share/man/man9/DELAY.9

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+.\" -*- nroff -*-
+.\"
+.\" Copyright (c) 2000 Alfred Perlstein
+.\"
+.\" All rights reserved.
+.\"
+.\" This program is free software.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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+.\" $FreeBSD$
+.\"
+.Dd November 21, 2000
+.Os FreeBSD
+.Dt DELAY 9
+.Sh NAME
+.Nm DELAY
+.Nd Busy loop for an interval.
+.Sh SYNOPSIS
+.Fd #include <machine/clock.h>
+.Ft void
+.Fn DELAY "int delay"
+.Sh DESCRIPTION
+Delay for
+.Fa delay
+microseconds.  (1/1000000th of a second)
+.Sh AUTHORS
+This man page was written by
+.An Alfred Perlstein .