73 lines
1.1 KiB
C
73 lines
1.1 KiB
C
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//
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// MODULE : MEMIO.C
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// PURPOSE : Memory mapped IO
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// AUTHOR : JBS Yadawa
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// CREATED : 7/20/96
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//
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//
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// Copyright (C) 1996 SGS-THOMSON Microelectronics
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//
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//
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// REVISION HISTORY :
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//
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// DATE :
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//
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// COMMENTS :
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//
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#include "common.h"
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#include "stdefs.h"
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#include <conio.h>
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#include "memio.h"
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volatile PUCHAR lpBase = NULL;
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volatile PUSHORT lpWordPtr = NULL;
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volatile PULONG lpDwordPtr = NULL;
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BOOL FARAPI AllocMemoryBase(DWORD addr, DWORD memsize)
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{
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lpBase = (volatile PUCHAR)addr;
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lpWordPtr = (volatile PUSHORT)addr;
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lpDwordPtr = (volatile PULONG)addr;
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return TRUE;
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}
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BOOL FARAPI FreeMemoryBase(void)
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{
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lpBase = NULL;
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return TRUE;
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}
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void FARAPI memOutByte(WORD reg, BYTE Val)
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{
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lpBase[reg] = Val;
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}
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void FARAPI memOutWord(WORD reg, WORD Val)
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{
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lpWordPtr[reg>>1] = Val;
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}
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void FARAPI memOutDword(WORD reg, DWORD Val)
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{
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lpDwordPtr[reg>>2] = Val;
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}
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BYTE FARAPI memInByte(WORD reg)
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{
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return lpBase[reg];
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}
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WORD FARAPI memInWord(WORD reg)
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{
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return lpWordPtr[reg>>1];
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}
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DWORD FARAPI memInDword(WORD reg)
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{
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return lpDwordPtr[reg>>2];
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}
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