.\"	$OpenBSD: cgtwo.4,v 1.6 2002/06/30 21:45:25 deraadt Exp $
.\" Copyright (c) 1992, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This software was developed by the Computer Systems Engineering group
.\" at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
.\" contributed to Berkeley.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
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.\" 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.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\"	from: Header: cgthree.4,v 1.3 94/02/03 20:49:52 leres Exp
.\"     from: @(#)cgthree.4	8.2 (Berkeley) 2/16/94
.\"	$NetBSD: cgtwo.4,v 1.1.1.1 1995/08/08 20:18:53 gwr Exp $
.\"
.Dd February 16, 1994
.Dt CGTWO 4 sun3
.Os
.Sh NAME
.Nm cgtwo
.Nd 8-bit color frame buffer
.Sh SYNOPSIS
.Cd "cgtwo0 at vmes0 addr 0xff400000 level 4 vect 0xa8"
.Sh DESCRIPTION
The
.Nm
is a memory based color frame buffer.
Its control pixel memory can be mapped into a user process address
space by using the
.Xr mmap 2
system call.
The
.Nm
driver supports the minimal
.Xr ioctl 2 Ns s
needed to run
.Xr X 7 .
.Sh SEE ALSO
.Xr bwtwo 4 ,
.Xr cgfour 4