78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/* NetHack 3.7 portio.h $NHDT-Date: 1596498273 2020/08/03 23:44:33 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.10 $ */
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/* Copyright (c) NetHack PC Development Team 1995 */
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/* NetHack may be freely redistributed. See license for details. */
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/* */
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/*
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* portio.h - PC port I/O Hardware support definitions and other
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* low-level definitions.
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*
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*/
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#ifndef PORTIO_H
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#define PORTIO_H
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#if defined(__GO32__) || defined(__DJGPP__)
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#define __far
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#include <go32.h>
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#include <dpmi.h>
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#include <sys/farptr.h>
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#endif
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#if defined(_MSC_VER)
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#define outportb _outp
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#define outportw _outpw
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#define inportb _inp
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#endif
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#if defined(__BORLANDC__)
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#define outportw outport
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/* #define inportb inport */
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#endif
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#ifndef MK_PTR
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/*
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* Depending on environment, this is a macro to construct either:
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*
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* - a djgpp long 32 bit pointer from segment & offset values
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* - a far pointer from segment and offset values
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*
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*/
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#if defined(_MSC_VER) || defined(__BORLANDC__)
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#define MK_PTR(seg, offset) \
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(void __far *)(((unsigned long) seg << 16) \
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+ (unsigned long) (unsigned) offset)
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#define READ_ABSOLUTE(x) *(x)
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#define READ_ABSOLUTE_WORD(x) *(x)
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#define WRITE_ABSOLUTE(x, y) *(x) = (y)
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#define WRITE_ABSOLUTE_WORD(x, y) *(x) = (y)
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#define WRITE_ABSOLUTE_DWORD(x, y) *(x) = (y)
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#endif
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#if defined(__GO32__) || defined(__DJGPP__)
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#define MK_PTR(seg, offset) \
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(void *)(((unsigned) seg << 4) + (unsigned) offset)
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#define READ_ABSOLUTE(x) \
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(_farpeekb(_go32_conventional_mem_selector(), (unsigned) x))
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#define READ_ABSOLUTE_WORD(x) \
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(_farpeekw(_go32_conventional_mem_selector(), (unsigned) x))
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#define WRITE_ABSOLUTE(x, y) \
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_farpokeb(_go32_conventional_mem_selector(), (unsigned) x, (y))
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#define WRITE_ABSOLUTE_WORD(x, y) \
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_farpokew(_go32_conventional_mem_selector(), (unsigned) x, (y))
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#define WRITE_ABSOLUTE_DWORD(x, y) \
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_farpokel(_go32_conventional_mem_selector(), (unsigned) x, (y))
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#endif
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#ifdef OBSOLETE /* old djgpp V1.x way of mapping 1st MB */
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#define MK_PTR(seg, offset) \
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(void *)(0xE0000000 + ((((unsigned) seg << 4) + (unsigned) offset)))
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#define READ_ABSOLUTE(x) *(x)
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#define READ_ABSOLUTE_WORD(x) *(x)
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#define WRITE_ABSOLUTE(x, y) *(x) = (y)
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#define WRITE_ABSOLUTE_WORD(x, y) *(x) = (y)
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#define WRITE_ABSOLUTE_DWORD(x, y) *(x) = (y)
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#endif
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#endif /* MK_PTR */
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#endif /* PORTIO_H */
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/* portio.h */
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