1.\" $NetBSD: et.4,v 1.14 2009/03/11 13:41:25 joerg Exp $ 2.\" 3.\" Copyright (c) 1998 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Julian Coleman. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd July 30, 1998 31.Dt ET 4 atari 32.Os 33.Sh NAME 34.Nm et 35.Nd driver for ET4000 VME graphics cards 36.Sh SYNOPSIS 37.Cd "et0 at vme0" 38.Sh DESCRIPTION 39The 40.Nm 41device driver supports VME graphics cards based on the Tseng ET4000 chipset. 42It supports the minimal ioctl's needed to run X11. The 8Kb control registers 43are mapped from offset 0x0 to offset 0x1fff and the 1MB frame buffer is mapped 44from offset 0x400000 to offset 0x4fffff. VGA compatible memory is mapped from 45offset 0xa0000 to offset 0xc0000. 46.Sh HARDWARE 47Cards supported by the 48.Nm 49driver include: 50.Pp 51.Bl -item -compact 52.It 53Crazy Dots II VME graphics card 54.El 55.Sh NOTES 56The clock generator on the Crazy Dots card is an ICS 1394M. Setting the 57clock is done by writing to a register at offset 0x0. This address cannot 58be read. The values that can be written to the register and the associated 59clock are: 60.Bl -column "Value " "Clock" -offset indent 61.It Em Value Ta Em Clock 62.It Li 0x00 Ta 6314318 64.It Li 0x10 Ta 6516257 66.It Li 0x17 Ta 6720000 68.It Li 0x0c Ta 6924000 70.It Li 0x04 Ta 7125175 72.It Li 0x14 Ta 7328332 74.It Li 0x18 Ta 7532514 76.It Li 0x1a Ta 7736000 78.It Li 0x1c Ta 7940000 80.It Li 0x03 Ta 8144900 82.It Li 0x0f Ta 8350000 84.It Li 0x13 Ta 8550344 86.It Li 0x07 Ta 8756644 88.It Li 0x11 Ta 8965028 90.It Li 0x1f Ta 9180000 92.El 93.Sh FILES 94.Bl -tag -width "xxxxxxxxxx" -compact 95.It Pa /dev/etvme 96.El 97.Sh AUTHORS 98.An Julian Coleman 99.Sh BUGS 100The driver does not support a text mode, so cannot be used as a console. 101