72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/* SCCS Id: @(#)portio.h 3.4 1995/08/05 */
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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) (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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# endif
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# if defined(__GO32__) || defined(__DJGPP__)
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#define MK_PTR(seg, offset) (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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# 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) (void *)(0xE0000000+((((unsigned)seg << 4) \
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+ (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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# 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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