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+.\"	$NetBSD: cgfour.4,v 1.9 2017/02/17 22:24:47 christos Exp $
+.\"
+.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Paul Kranenburg.
+.\"
+.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd February 17, 2017
+.Dt CGFOUR 4 sparc
+.Os
+.Sh NAME
+.Nm cgfour
+.Nd Sun 8-bit color frame buffer
+.Sh SYNOPSIS
+.Cd "cgfour0 at obio0 addr 0xfb300000 level 4" Pq sun4/300
+.Cd "cgfour0 at obio0 addr 0x0b300000 level 4" Pq sun4/100
+.Sh DESCRIPTION
+The
+.Nm
+is a memory based color frame buffer with overlay plane.
+Its pixel memory and control planes can be mapped into a user
+process address space by using the
+.Xr mmap 2
+system call.
+The
+.Nm
+driver supports the minimal ioctl's needed to run
+.Xr Xorg 1 .
+.Sh SEE ALSO
+.Xr sparc/bwtwo 4 ,
+.Xr sparc/cgeight 4 ,
+.Xr sparc/cgsix 4 ,
+.Xr sparc/cgthree 4 ,
+.Xr sparc/cgtwo 4 ,
+.Xr sparc/tcx 4