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/* SCCS Id: @(#)portio.h 3.4 1995/08/05 */
/* Copyright (c) NetHack PC Development Team 1995 */
/* NetHack may be freely redistributed. See license for details. */
/* */
/*
* portio.h - PC port I/O Hardware support definitions and other
* low-level definitions.
*
*/
#ifndef PORTIO_H
#define PORTIO_H
# if defined(__GO32__) || defined(__DJGPP__)
#define __far
#include <go32.h>
#include <dpmi.h>
#include <sys/farptr.h>
#endif
# if defined(_MSC_VER)
#define outportb _outp
#define outportw _outpw
#define inportb _inp
# endif
# if defined(__BORLANDC__)
#define outportw outport
/* #define inportb inport */
# endif
# ifndef MK_PTR
/*
* Depending on environment, this is a macro to construct either:
*
* - a djgpp long 32 bit pointer from segment & offset values
* - a far pointer from segment and offset values
*
*/
# if defined(_MSC_VER) || defined(__BORLANDC__)
#define MK_PTR(seg, offset) (void __far *)(((unsigned long)seg << 16) \
+ (unsigned long)(unsigned)offset)
#define READ_ABSOLUTE(x) *(x)
#define READ_ABSOLUTE_WORD(x) *(x)
#define WRITE_ABSOLUTE(x,y) *(x) = (y)
#define WRITE_ABSOLUTE_WORD(x,y) *(x) = (y)
# endif
# if defined(__GO32__) || defined(__DJGPP__)
#define MK_PTR(seg, offset) (void *)(((unsigned)seg << 4) + (unsigned)offset)
#define READ_ABSOLUTE(x) \
(_farpeekb(_go32_conventional_mem_selector(), (unsigned)x))
#define READ_ABSOLUTE_WORD(x) \
(_farpeekw(_go32_conventional_mem_selector(), (unsigned)x))
#define WRITE_ABSOLUTE(x,y) \
_farpokeb(_go32_conventional_mem_selector(), (unsigned)x, (y))
#define WRITE_ABSOLUTE_WORD(x,y) \
_farpokew(_go32_conventional_mem_selector(), (unsigned)x, (y))
# endif
# ifdef OBSOLETE /* old djgpp V1.x way of mapping 1st MB */
#define MK_PTR(seg, offset) (void *)(0xE0000000+((((unsigned)seg << 4) \
+ (unsigned)offset)))
#define READ_ABSOLUTE(x) *(x)
#define READ_ABSOLUTE_WORD(x) *(x)
#define WRITE_ABSOLUTE(x,y) *(x) = (y)
#define WRITE_ABSOLUTE_WORD(x,y) *(x) = (y)
# endif
# endif /* MK_PTR */
#endif /* PORTIO_H */
/* portio.h */
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