AxibugEmuOnline/References/virtuanessrc097-master/NES/ROM.h
2024-08-05 17:58:53 +08:00

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//////////////////////////////////////////////////////////////////////////
// //
// NES ROM Cartridge class //
// Norix //
// written 2001/02/20 //
// last modify ----/--/-- //
//////////////////////////////////////////////////////////////////////////
#ifndef __ROM_INCLUDED__
#define __ROM_INCLUDED__
#pragma warning(disable:4786)
#include <string>
using namespace std;
#include "typedef.h"
#include "macro.h"
#pragma pack( push, 1 )
typedef struct tagNESHEADER {
BYTE ID[4];
BYTE PRG_PAGE_SIZE;
BYTE CHR_PAGE_SIZE;
BYTE control1;
BYTE control2;
BYTE reserved[8];
} NESHEADER;
typedef struct tagNSFHEADER {
BYTE ID[5];
BYTE Version;
BYTE TotalSong;
BYTE StartSong;
WORD LoadAddress;
WORD InitAddress;
WORD PlayAddress;
BYTE SongName[32];
BYTE ArtistName[32];
BYTE CopyrightName[32];
WORD SpeedNTSC;
BYTE BankSwitch[8];
WORD SpeedPAL;
BYTE NTSC_PALbits;
BYTE ExtraChipSelect;
BYTE Expansion[4]; // must be 0
} NSFHEADER;
#pragma pack( pop )
class ROM
{
public:
ROM( const char* fname );
virtual ~ROM();
// ROM control byte #1
enum { ROM_VMIRROR = 0x01, ROM_SAVERAM = 0x02,
ROM_TRAINER = 0x04, ROM_4SCREEN = 0x08 };
// ROM control byte #2
enum { ROM_VSUNISYSTEM = 0x01 };
// Get NESHEADER
NESHEADER* GetNesHeader() { return &header; }
// Get NSFHEADER
NSFHEADER* GetNsfHeader() { return &nsfheader; }
// Get ROM buffer pointer
LPBYTE GetPROM() { return lpPRG; }
LPBYTE GetVROM() { return lpCHR; }
LPBYTE GetTRAINER() { return lpTrainer; }
LPBYTE GetDISKBIOS() { return lpDiskBios; }
LPBYTE GetDISK() { return lpDisk; }
// Get ROM size
BYTE GetPROM_SIZE() { return header.PRG_PAGE_SIZE; }
BYTE GetVROM_SIZE() { return header.CHR_PAGE_SIZE; }
// Get PROM
DWORD GetPROM_CRC() { return crc; }
DWORD GetROM_CRC() { return crcall; }
DWORD GetVROM_CRC() { return crcvrom; }
// Get FDS ID
DWORD GetMakerID() { return fdsmakerID; }
DWORD GetGameID() { return fdsgameID; }
// ROM control
BOOL IsVMIRROR() { return header.control1 & ROM_VMIRROR; }
BOOL Is4SCREEN() { return header.control1 & ROM_4SCREEN; }
BOOL IsSAVERAM() { return header.control1 & ROM_SAVERAM; }
BOOL IsTRAINER() { return header.control1 & ROM_TRAINER; }
BOOL IsVSUNISYSTEM() { return header.control2 & ROM_VSUNISYSTEM; }
BOOL IsPAL() { return bPAL; }
// Mapper
INT GetMapperNo() { return mapper; }
// Disks
INT GetDiskNo() { return diskno; }
// NSF
BOOL IsNSF() { return bNSF; }
BYTE GetNSF_SIZE() { return NSF_PAGE_SIZE; }
// ROM Paths
const char* GetRomPath() { return path; }
const char* GetRomName() { return name; }
const char* GetFullPathName() { return fullpath; }
// File check
// 0:ERROR 1:HEADER OK -1:BAD HEADER
static INT IsRomFile( const char* fname );
protected:
NESHEADER header;
NSFHEADER nsfheader;
LPBYTE lpPRG;
LPBYTE lpCHR;
LPBYTE lpTrainer;
LPBYTE lpDiskBios;
LPBYTE lpDisk;
// PROM CRC
DWORD crc;
DWORD crcall;
DWORD crcvrom;
DWORD fdsmakerID, fdsgameID;
INT mapper;
INT diskno;
// For PAL(Database)
BOOL bPAL;
// For NSF
BOOL bNSF;
INT NSF_PAGE_SIZE;
CHAR path[_MAX_PATH];
CHAR name[_MAX_FNAME];
CHAR fullpath[_MAX_PATH];
//
void FilenameCheck( const char* fname );
private:
};
/*
A. iNES Format (.NES)
---------------------
+--------+------+------------------------------------------+
| Offset | Size | Content(s) |
+--------+------+------------------------------------------+
| 0 | 3 | 'NES' |
| 3 | 1 | $1A |
| 4 | 1 | 16K PRG-ROM page count |
| 5 | 1 | 8K CHR-ROM page count |
| 6 | 1 | ROM Control Byte #1 |
| | | %####vTsM |
| | | | ||||+- 0=Horizontal mirroring |
| | | | |||| 1=Vertical mirroring |
| | | | |||+-- 1=SRAM enabled |
| | | | ||+--- 1=512-byte trainer present |
| | | | |+---- 1=Four-screen mirroring |
| | | | | |
| | | +--+----- Mapper # (lower 4-bits) |
| 7 | 1 | ROM Control Byte #2 |
| | | %####00PV |
| | | | | |+- 1=VS-Unisystem Images |
| | | | | +-- 1=PlayChoice10 Images |
| | | | | |
| | | +--+----- Mapper # (upper 4-bits) |
| 8-15 | 8 | $00 |
| 16-.. | | Actual 16K PRG-ROM pages (in linear |
| ... | | order). If a trainer exists, it precedes |
| ... | | the first PRG-ROM page. |
| ..-EOF | | CHR-ROM pages (in ascending order). |
+--------+------+------------------------------------------+
*/
#endif // !__ROM_INCLUDED__