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/* $OpenBSD: mc6845.h,v 1.5 2005/12/12 12:35:49 mickey Exp $ */
/*
* Copyright (c) 1992, 1995 Hellmuth Michaelis and Joerg Wunsch.
* Copyright (c) 1992, 1993 Brian Dunford-Shore.
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* Hellmuth Michaelis, Brian Dunford-Shore and Joerg Wunsch.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 REGENTS 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.
*
*/
#define MONO_BASE 0x3B4 /* crtc index register address mono */
#define CGA_BASE 0x3D4 /* crtc index register address color */
#define CRTC_ADDR 0x00 /* index register */
#define CRTC_HTOTAL 0x00 /* horizontal total */
#define CRTC_HDISPLE 0x01 /* horizontal display end */
#define CRTC_HBLANKS 0x02 /* horizontal blank start */
#define CRTC_HBLANKE 0x03 /* horizontal blank end */
#define CRTC_HSYNCS 0x04 /* horizontal sync start */
#define CRTC_HSYNCE 0x05 /* horizontal sync end */
#define CRTC_VTOTAL 0x06 /* vertical total */
#define CRTC_OVERFLL 0x07 /* overflow low */
#define CRTC_IROWADDR 0x08 /* initial row address */
#define CRTC_MAXROW 0x09 /* maximum row address */
#define CRTC_CURSTART 0x0A /* cursor start row address */
#define CRTC_CUREND 0x0B /* cursor end row address */
#define CRTC_STARTADRH 0x0C /* linear start address mid */
#define CRTC_STARTADRL 0x0D /* linear start address low */
#define CRTC_CURSORH 0x0E /* cursor address mid */
#define CRTC_CURSORL 0x0F /* cursor address low */
#define CRTC_VSYNCS 0x10 /* vertical sync start */
#define CRTC_VSYNCE 0x11 /* vertical sync end */
#define CRTC_VDE 0x12 /* vertical display end */
#define CRTC_OFFSET 0x13 /* row offset */
#define CRTC_ULOC 0x14 /* underline row address */
#define CRTC_VBSTART 0x15 /* vertical blank start */
#define CRTC_VBEND 0x16 /* vertical blank end */
#define CRTC_MODE 0x17 /* CRTC mode register */
#define CRTC_SPLITL 0x18 /* split screen start low */
/* start of ET4000 extensions */
#define CRTC_RASCAS 0x32 /* ras/cas configuration */
#define CRTC_EXTSTART 0x33 /* extended start address */
#define CRTC_COMPAT6845 0x34 /* 6845 compatibility control */
#define CRTC_OVFLHIGH 0x35 /* overflow high */
#define CRTC_SYSCONF1 0x36 /* video system configuration 1 */
#define CRTC_SYSCONF2 0x36 /* video system configuration 2 */
/* start of WD/Paradise extensions */
#define CRTC_PR10 0x29 /* r/w unlocking */
#define CRTC_PR11 0x2A /* ega switches */
#define CRTC_PR12 0x2B /* scratch pad */
#define CRTC_PR13 0x2C /* interlace h/2 start */
#define CRTC_PR14 0x2D /* interlace h/2 end */
#define CRTC_PR15 0x2E /* misc control #1 */
#define CRTC_PR16 0x2F /* misc control #2 */
#define CRTC_PR17 0x30 /* misc control #3 */
/* 0x31 .. 0x3f reserved */
/* Video 7 */
#define CRTC_V7ID 0x1f /* identification register */
/* Trident */
#define CRTC_MTEST 0x1e /* module test register */
#define CRTC_SOFTPROG 0x1f /* software programming */
#define CRTC_LATCHRDB 0x22 /* latch read back register */
#define CRTC_ATTRSRDB 0x24 /* attribute state read back register*/
#define CRTC_ATTRIRDB 0x26 /* attribute index read back register*/
#define CRTC_HOSTAR 0x27 /* high order start address register */
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