/*      $NetBSD: grfabs_et.h,v 1.4 2011/10/04 04:50:20 chs Exp $        */

/*
* Copyright (c) 1996 Leo Weppelman.
* 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.
*
* 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 AUTHOR 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.
*/

/*
* Saved register-state of the ET4000
*/
typedef struct {
       u_char  misc_output;
       u_char  crt[25];        /* Std. VGA crt registers       */
       u_char  attr[25];       /* Std. VGA attr. registers     */
       u_char  grf[9];         /* Std. VGA grf. registers      */
       u_char  seq[5];         /* Std. VGA seq. registers      */

       /* ET4000 extensions */
       u_char  ext_start;      /* Extra Crt registers          */
       u_char  compat_6845;
       u_char  overfl_high;
       u_char  hor_overfl;
       u_char  state_ctl;      /* Extra Seq. registers         */
       u_char  aux_mode;
       u_char  seg_sel;        /* Extra general register       */
} et_sv_reg_t;

typedef struct {
       et_sv_reg_t     sv_regs;        /* saved card regs      */
       int             fb_size;        /* # of shorts in sv_fb */
       u_short         sv_fb[1];       /* saved frame buffer   */
       /* actually longer... */
} save_area_t;

void    et_hwrest(et_sv_reg_t *);
void    et_hwsave(et_sv_reg_t *);
int     et_probe_card(void);
void    et_probe_video(MODES *);