1.\" $NetBSD: et.4,v 1.13 2008/04/30 13:10:55 martin 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.Sh NAME 33.Nm et 34.Nd driver for ET4000 VME graphics cards 35.Sh SYNOPSIS 36.Cd "et0 at vme0" 37.Sh DESCRIPTION 38The 39.Nm 40device driver supports VME graphics cards based on the Tseng ET4000 chipset. 41It supports the minimal ioctl's needed to run X11. The 8Kb control registers 42are mapped from offset 0x0 to offset 0x1fff and the 1MB frame buffer is mapped 43from offset 0x400000 to offset 0x4fffff. VGA compatible memory is mapped from 44offset 0xa0000 to offset 0xc0000. 45.Sh HARDWARE 46Cards supported by the 47.Nm 48driver include: 49.Pp 50.Bl -item -compact 51.It 52Crazy Dots II VME graphics card 53.El 54.Sh NOTES 55The clock generator on the Crazy Dots card is an ICS 1394M. Setting the 56clock is done by writing to a register at offset 0x0. This address cannot 57be read. The values that can be written to the register and the associated 58clock are: 59.Bl -column "Value " "Clock" -offset indent 60.It Em Value Ta Em Clock 61.It Li 0x00 Ta 6214318 63.It Li 0x10 Ta 6416257 65.It Li 0x17 Ta 6620000 67.It Li 0x0c Ta 6824000 69.It Li 0x04 Ta 7025175 71.It Li 0x14 Ta 7228332 73.It Li 0x18 Ta 7432514 75.It Li 0x1a Ta 7636000 77.It Li 0x1c Ta 7840000 79.It Li 0x03 Ta 8044900 81.It Li 0x0f Ta 8250000 83.It Li 0x13 Ta 8450344 85.It Li 0x07 Ta 8656644 87.It Li 0x11 Ta 8865028 89.It Li 0x1f Ta 9080000 91.El 92.Sh FILES 93.Bl -tag -width "xxxxxxxxxx" -compact 94.It Pa /dev/etvme 95.El 96.Sh AUTHORS 97.An Julian Coleman 98.Sh BUGS 99The driver does not support a text mode, so cannot be used as a console. 100