usr.bin/doscmd/emuint.h

   1 /*
   2  * Copyright (c) 1997 Helmut Wirth <hfwirth@ping.at>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice immediately at the beginning of the file, witout modification,
  10  *    this list of conditions, and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/usr.bin/doscmd/emuint.h,v 1.2 1999/08/28 01:00:14 peter Exp $
  29  * $DragonFly: src/usr.bin/doscmd/emuint.h,v 1.2 2003/06/17 04:29:26 dillon Exp $
  30  */
  31
  32
  33 /*
  34  * The emulator helper interrupt:
  35  *
  36  * Interrupt 0xFF is used by some emulator functions. It is a portal into
  37  * the emulator and cannot be used by ordinary DOS applications directly
  38  * The interrupt 0xFF is called by helper functions under DOS (such as
  39  * the redirector interfcae and the EMS emulation).
  40  * There are functions and subfunctions defined. (See emuint.c for details)
  41  */
  42
  43 /* The redirector interface (formerly instbsdi.exe) */
  44 #define EMU_REDIR       0x1     /* Function for redirector interface */
  45 /* No subfunctions defined */
  46
  47 /* Expanded memory (EMS) driver callback */
  48 #define EMU_EMS         0x2     /* Function for EMS driver control */
  49 /* subfunctions for EMS */
  50 #define EMU_EMS_CTL     0x0     /* Control function, used during init */
  51 #define EMU_EMS_CALL    0x1     /* Callback, calls are routed via this */