sys/msdos/portio.h

   1 /* aNetHack 0.0.1       portio.h        $ANH-Date: 1432512791 2015/05/25 00:13:11 $  $ANH-Branch: master $:$ANH-Revision: 1.8 $ */
   2 /*   Copyright (c) aNetHack PC Development Team 1995                 */
   3 /*   aNetHack may be freely redistributed.  See license for details. */
   4 /*                                                                  */
   5 /*
   6  * portio.h - PC port I/O Hardware support definitions and other
   7  *            low-level definitions.
   8  *
   9  */
  10
  11 #ifndef PORTIO_H
  12 #define PORTIO_H
  13
  14 #if defined(__GO32__) || defined(__DJGPP__)
  15 #define __far
  16 #include <go32.h>
  17 #include <dpmi.h>
  18 #include <sys/farptr.h>
  19 #endif
  20
  21 #if defined(_MSC_VER)
  22 #define outportb _outp
  23 #define outportw _outpw
  24 #define inportb _inp
  25 #endif
  26 #if defined(__BORLANDC__)
  27 #define outportw outport
  28 /* #define inportb inport */
  29 #endif
  30
  31 #ifndef MK_PTR
  32 /*
  33  * Depending on environment, this is a macro to construct either:
  34  *
  35  *     -  a djgpp long 32 bit pointer from segment & offset values
  36  *     -  a far pointer from segment and offset values
  37  *
  38  */
  39 #if defined(_MSC_VER) || defined(__BORLANDC__)
  40 #define MK_PTR(seg, offset)                    \
  41     (void __far *)(((unsigned long) seg << 16) \
  42                    + (unsigned long) (unsigned) offset)
  43 #define READ_ABSOLUTE(x) *(x)
  44 #define READ_ABSOLUTE_WORD(x) *(x)
  45 #define WRITE_ABSOLUTE(x, y) *(x) = (y)
  46 #define WRITE_ABSOLUTE_WORD(x, y) *(x) = (y)
  47 #endif
  48
  49 #if defined(__GO32__) || defined(__DJGPP__)
  50 #define MK_PTR(seg, offset) \
  51     (void *)(((unsigned) seg << 4) + (unsigned) offset)
  52 #define READ_ABSOLUTE(x) \
  53     (_farpeekb(_go32_conventional_mem_selector(), (unsigned) x))
  54 #define READ_ABSOLUTE_WORD(x) \
  55     (_farpeekw(_go32_conventional_mem_selector(), (unsigned) x))
  56 #define WRITE_ABSOLUTE(x, y) \
  57     _farpokeb(_go32_conventional_mem_selector(), (unsigned) x, (y))
  58 #define WRITE_ABSOLUTE_WORD(x, y) \
  59     _farpokew(_go32_conventional_mem_selector(), (unsigned) x, (y))
  60 #endif
  61
  62 #ifdef OBSOLETE /* old djgpp V1.x way of mapping 1st MB */
  63 #define MK_PTR(seg, offset) \
  64     (void *)(0xE0000000 + ((((unsigned) seg << 4) + (unsigned) offset)))
  65 #define READ_ABSOLUTE(x) *(x)
  66 #define READ_ABSOLUTE_WORD(x) *(x)
  67 #define WRITE_ABSOLUTE(x, y) *(x) = (y)
  68 #define WRITE_ABSOLUTE_WORD(x, y) *(x) = (y)
  69 #endif
  70 #endif /* MK_PTR */
  71
  72 #endif /* PORTIO_H  */
  73 /* portio.h */