Ejemplo n.º 1
0
boolean_t
vgahost_init (int max_width, int max_height, int max_bpp, boolean_t fixed_p,
	      int *argc, char *argv[])
{
  int sel;

  /* Grab a 64K selector for 0xA000:0000, for the frame buffer. */
  sel = __dpmi_segment_to_descriptor (0xA000);
  if (sel == -1)
    return FALSE;
  vga_window_selector = sel;
  vga_screen_selector = -1;  /* no value yet. */

  vesa_version = compute_vesa_version ();

#if defined (SAVE_VGA_STATE)

#if !defined (USE_VESA_STATE_SAVE)
  state_glue_funcp = vga_state_glue;
#else /* USE_VESA_STATE_SAVE */
#error "this will break with the mods to try switching to fullscreen and querying VESA version again...we might save the wrong kind of state!"
  if (vesa_version >= 0x100)  /* version 1.0 or greater? */
    state_glue_funcp = vesa_state_glue;
  else
    state_glue_funcp = vga_state_glue;
#endif /* USE_VESA_STATE_SAVE */

#endif

  /* Save the current VGA state, so we can clean up well when we exit. */
  save_vga_state ();

  /* WinNT appears to not show us a VESA driver unless we start in
   * full screen mode.  However, if we set a plain VGA graphics mode
   * it switches us to full screen mode.  If we didn't see a VESA
   * driver, this attempts to switch to fullscreen mode and then try
   * again.
   */
  if (vesa_version == 0 && !only_use_vga_p)
    {
      __dpmi_regs regs;

      dpmi_zero_regs (&regs);
      regs.x.ax = 0x12;  /* 640x480 VGA mode.  AH == 0x00.  Erase screen. */
      if (__dpmi_int (0x10, &regs) == 0)
	{
	  vesa_version = compute_vesa_version ();
	  restore_vga_state ();
	}
    }

  return TRUE;
}
Ejemplo n.º 2
0
Archivo: vc.c Proyecto: aunali1/exopc 
int set_current_console(int i)
{
    if (i < 0 || i >= MAX_OSS) {
	return -1;
    }
    SCR_STATE.current = 0;
    save_vga_state(dosemu_regs);
    current_console = i;
    dosemu_regs = &all_dosemu_regs[current_console];
    restore_vga_state(dosemu_regs);
    SCR_STATE.current = 1;

    return 0;
}