102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/*
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* Project 64 - A Nintendo 64 emulator.
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*
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* (c) Copyright 2001 zilmar (zilmar@emulation64.com) and
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* Jabo (jabo@emulation64.com).
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*
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* pj64 homepage: www.pj64.net
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*
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* Permission to use, copy, modify and distribute Project64 in both binary and
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* source form, for non-commercial purposes, is hereby granted without fee,
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* providing that this license information and copyright notice appear with
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* all copies and any derived work.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event shall the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Project64 is freeware for PERSONAL USE only. Commercial users should
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* seek permission of the copyright holders first. Commercial use includes
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* charging money for Project64 or software derived from Project64.
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*
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* The copyright holders request that bug fixes and improvements to the code
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* should be forwarded to them so if they want them.
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*
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*/
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#include <windows.h>
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#include <stdio.h>
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#include "main.h"
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#include "CPU.h"
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static HANDLE hSramFile = NULL;
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void CloseSram (void) {
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if (hSramFile) {
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CloseHandle(hSramFile);
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hSramFile = NULL;
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}
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}
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BOOL LoadSram (void) {
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char File[255], Directory[255];
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LPVOID lpMsgBuf;
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GetAutoSaveDir(Directory);
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sprintf(File,"%s%s.sra",Directory,RomName);
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hSramFile = CreateFile(File,GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ,NULL,OPEN_ALWAYS,
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL);
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if (hSramFile == INVALID_HANDLE_VALUE) {
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switch (GetLastError()) {
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case ERROR_PATH_NOT_FOUND:
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CreateDirectory(Directory,NULL);
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hSramFile = CreateFile(File,GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ,
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NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL);
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if (hSramFile == INVALID_HANDLE_VALUE) {
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,NULL,GetLastError(),MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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(LPTSTR) &lpMsgBuf,0,NULL
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);
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DisplayError(lpMsgBuf);
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LocalFree( lpMsgBuf );
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return FALSE;
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}
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break;
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default:
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,NULL,GetLastError(),MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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(LPTSTR) &lpMsgBuf,0,NULL
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);
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DisplayError(lpMsgBuf);
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LocalFree( lpMsgBuf );
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return FALSE;
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}
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}
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return TRUE;
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}
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void DmaFromSram(BYTE * dest, int StartOffset, int len) {
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DWORD dwRead;
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if (hSramFile == NULL) {
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if (!LoadSram()) {
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return;
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}
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}
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SetFilePointer(hSramFile,StartOffset,NULL,FILE_BEGIN);
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ReadFile(hSramFile,dest,len,&dwRead,NULL);
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}
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void DmaToSram(BYTE * Source, int StartOffset, int len) {
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DWORD dwWritten;
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if (hSramFile == NULL) {
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if (!LoadSram()) {
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return;
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}
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}
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SetFilePointer(hSramFile,StartOffset,NULL,FILE_BEGIN);
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WriteFile(hSramFile,Source,len,&dwWritten,NULL);
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}
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