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+.\" $NetBSD: makedev.3,v 1.3 2026/04/09 16:10:49 christos Exp $
+.\"
+.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
+.\" All rights reserved.
+.\"
+.\" 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD: src/share/man/man3/makedev.3,v 1.2 2008/09/28 20:26:16 ed Exp $
+.\"
+.Dd April 9, 2026
+.Dt MAKEDEV 3
+.Os
+.Sh NAME
+.Nm makedev ,
+.Nm major ,
+.Nm minor
+.Nd device number conversion
+.Sh SYNOPSIS
+.In sys/types.h
+.Ft dev_t
+.Fn makedev "int major" "int minor"
+.Ft int
+.Fn major "dev_t dev"
+.Ft int
+.Fn minor "dev_t dev"
+.Sh DESCRIPTION
+The
+.Fn makedev
+macro allows a unique device number to be generated based on its
+.Fa major
+and
+.Fa minor
+number.
+The
+.Fn major
+and
+.Fn minor
+macros can be used to obtain the original numbers from the device number
+.Fa dev .
+.Pp
+All block and character devices are uniquely
+identified by a pair of major and minor numbers.
+The major number refers to a certain device class (e.g. disks, TTYs)
+while the minor number identifies an instance within the device class.
+.Sh RETURN VALUES
+The
+.Fn major
+macro returns a device major number that has a value between 0 and 4095 (0xfff).
+The
+.Fn minor
+macro returns a device minor number that has a value between 0 and 1048575
+(0xfffff).
+.Sh SEE ALSO
+.Xr mknod 2 ,
+.Xr devname 3 ,
+.Xr MAKEDEV 8
+.Sh HISTORY
+The major and minor numbers used to support values between 0 and 255
+(0xff) until
+.Nx 1.3
+when the macros were changed to support their current ranges.