/*      $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 *);