1.\" $NetBSD: et.4,v 1.12 2002/01/15 01:29:43 wiz 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.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the NetBSD 20.\" Foundation, Inc. and its contributors. 21.\" 4. Neither the name of The NetBSD Foundation nor the names of its 22.\" contributors may be used to endorse or promote products derived 23.\" from this software without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35.\" POSSIBILITY OF SUCH DAMAGE. 36.\" 37.Dd July 30, 1998 38.Dt ET 4 atari 39.Sh NAME 40.Nm et 41.Nd driver for ET4000 VME graphics cards 42.Sh SYNOPSIS 43.Cd "et0 at vme0" 44.Sh DESCRIPTION 45The 46.Nm 47device driver supports VME graphics cards based on the Tseng ET4000 chipset. 48It supports the minimal ioctl's needed to run X11. The 8Kb control registers 49are mapped from offset 0x0 to offset 0x1fff and the 1MB frame buffer is mapped 50from offset 0x400000 to offset 0x4fffff. VGA compatible memory is mapped from 51offset 0xa0000 to offset 0xc0000. 52.Sh HARDWARE 53Cards supported by the 54.Nm 55driver include: 56.Pp 57.Bl -item -compact 58.It 59Crazy Dots II VME graphics card 60.El 61.Sh NOTES 62The clock generator on the Crazy Dots card is an ICS 1394M. Setting the 63clock is done by writing to a register at offset 0x0. This address cannot 64be read. The values that can be written to the register and the associated 65clock are: 66.Bl -column "Value " "Clock" -offset indent 67.It Em Value Ta Em Clock 68.It Li 0x00 Ta 6914318 70.It Li 0x10 Ta 7116257 72.It Li 0x17 Ta 7320000 74.It Li 0x0c Ta 7524000 76.It Li 0x04 Ta 7725175 78.It Li 0x14 Ta 7928332 80.It Li 0x18 Ta 8132514 82.It Li 0x1a Ta 8336000 84.It Li 0x1c Ta 8540000 86.It Li 0x03 Ta 8744900 88.It Li 0x0f Ta 8950000 90.It Li 0x13 Ta 9150344 92.It Li 0x07 Ta 9356644 94.It Li 0x11 Ta 9565028 96.It Li 0x1f Ta 9780000 98.El 99.Sh FILES 100.Bl -tag -width "xxxxxxxxxx" -compact 101.It Pa /dev/etvme 102.El 103.Sh AUTHORS 104.An Julian Coleman 105.Sh BUGS 106The driver does not support a text mode, so cannot be used as a console. 107