144 lines
3.6 KiB
C#
144 lines
3.6 KiB
C#
using System;
|
|
using System.Collections;
|
|
using System.Collections.Generic;
|
|
using UnityEngine;
|
|
|
|
namespace VirtualNes.Core
|
|
{
|
|
public enum EnumRomControlByte1 : byte
|
|
{
|
|
ROM_VMIRROR = 0x01,
|
|
ROM_SAVERAM = 0x02,
|
|
ROM_TRAINER = 0x04,
|
|
ROM_4SCREEN = 0x08,
|
|
}
|
|
|
|
public enum EnumRomControlByte2 : byte
|
|
{
|
|
ROM_VSUNISYSTEM = 0x01
|
|
}
|
|
|
|
public enum EnumRomType
|
|
{
|
|
InValid,
|
|
NES,
|
|
/// <summary> Nintendo Disk System </summary>
|
|
FDS,
|
|
NSF
|
|
}
|
|
|
|
public struct NSFHEADER
|
|
{
|
|
byte[] ID;
|
|
byte Version;
|
|
byte TotalSong;
|
|
byte StartSong;
|
|
ushort LoadAddress;
|
|
ushort InitAddress;
|
|
ushort PlayAddress;
|
|
byte[] SongName;
|
|
byte[] ArtistName;
|
|
byte[] CopyrightName;
|
|
ushort SpeedNTSC;
|
|
byte[] BankSwitch;
|
|
ushort SpeedPAL;
|
|
byte NTSC_PALbits;
|
|
byte ExtraChipSelect;
|
|
byte[] Expansion; // must be 0
|
|
|
|
|
|
public static int SizeOf()
|
|
{
|
|
return 128;
|
|
}
|
|
|
|
public static NSFHEADER GetDefault()
|
|
{
|
|
var res = new NSFHEADER();
|
|
res.ID = new byte[5];
|
|
res.SongName = new byte[32];
|
|
res.ArtistName = new byte[32];
|
|
res.CopyrightName = new byte[32];
|
|
res.BankSwitch = new byte[8];
|
|
res.Expansion = new byte[4];
|
|
return res;
|
|
}
|
|
}
|
|
|
|
public struct NESHEADER
|
|
{
|
|
public byte[] ID;
|
|
public byte PRG_PAGE_SIZE;
|
|
public byte CHR_PAGE_SIZE;
|
|
public byte control1;
|
|
public byte control2;
|
|
public byte[] reserved;
|
|
|
|
public bool CheckValid()
|
|
{
|
|
return GetRomType() != EnumRomType.InValid;
|
|
}
|
|
|
|
public static int SizeOf()
|
|
{
|
|
return 16;
|
|
}
|
|
|
|
public EnumRomType GetRomType()
|
|
{
|
|
if (ID[0] == 'N' && ID[1] == 'E' && ID[2] == 'S' && ID[3] == 0x1A)
|
|
return EnumRomType.NES;
|
|
if (ID[0] == 'F' && ID[1] == 'D' && ID[2] == 'S' && ID[3] == 0x1A)
|
|
return EnumRomType.FDS;
|
|
if (ID[0] == 'N' && ID[1] == 'E' && ID[2] == 'S' && ID[3] == 'M')
|
|
return EnumRomType.NSF;
|
|
|
|
return EnumRomType.InValid;
|
|
}
|
|
|
|
public static NESHEADER GetDefault()
|
|
{
|
|
var res = new NESHEADER();
|
|
res.ID = new byte[4];
|
|
res.reserved = new byte[8];
|
|
return res;
|
|
}
|
|
|
|
public static NESHEADER Read(Span<byte> data)
|
|
{
|
|
var res = new NESHEADER();
|
|
res.ID = data.Slice(0, 4).ToArray();
|
|
res.PRG_PAGE_SIZE = data[4];
|
|
res.CHR_PAGE_SIZE = data[5];
|
|
res.control1 = data[6];
|
|
res.control2 = data[7];
|
|
res.reserved = data.Slice(8, 8).ToArray();
|
|
|
|
return res;
|
|
}
|
|
|
|
public byte[] DataToBytes()
|
|
{
|
|
byte[] res = new byte[16];
|
|
res[0] = ID[0];
|
|
res[1] = ID[1];
|
|
res[2] = ID[2];
|
|
res[3] = ID[3];
|
|
res[4] = PRG_PAGE_SIZE;
|
|
res[5] = CHR_PAGE_SIZE;
|
|
res[6] = control1;
|
|
res[7] = control2;
|
|
res[8] = reserved[0];
|
|
res[9] = reserved[1];
|
|
res[10] = reserved[2];
|
|
res[11] = reserved[3];
|
|
res[12] = reserved[4];
|
|
res[13] = reserved[5];
|
|
res[14] = reserved[6];
|
|
res[15] = reserved[7];
|
|
|
|
return res;
|
|
}
|
|
}
|
|
}
|