} = 0x0000; // 16-bit
public AudioHardware(ROMData romData, ROMSet romset = ROMSet.PacMan)
{
if (romset != ROMSet.PacMan && romset != ROMSet.MsPacMan)
{
throw new ArgumentException($"Unexpected ROM set: {romset}");
}
_romset = romset;
var rom1 = romData.Data[ROMs.PAC_MAN_SOUND_1.FileName];
var rom2 = romData.Data[ROMs.PAC_MAN_SOUND_2.FileName];
_soundROMs = new byte[512];
Array.Copy(rom1, 0, _soundROMs, 0, 256);
Array.Copy(rom2, 0, _soundROMs, 256, 256);
}
public VideoHardware(ROMData romData, ROMSet romset = ROMSet.PacMan)
{
if (romset != ROMSet.PacMan && romset != ROMSet.MsPacMan)
{
throw new ArgumentException($"Unexpected ROM set: {romset}");
}
_romset = romset;
_colorROM = romData.Data[ROMs.PAC_MAN_COLOR.FileName];
_paletteROM = romData.Data[ROMs.PAC_MAN_PALETTE.FileName];
_tileROM = romData.Data[romset == ROMSet.MsPacMan ? ROMs.MS_PAC_MAN_TILE.FileName : ROMs.PAC_MAN_TILE.FileName];
_spriteROM = romData.Data[romset == ROMSet.MsPacMan ? ROMs.MS_PAC_MAN_SPRITE.FileName : ROMs.PAC_MAN_SPRITE.FileName];
_frameBuffer = new Image <Rgba32>(RESOLUTION_WIDTH, RESOLUTION_HEIGHT, new Rgba32()
{
R = 0, G = 0, B = 0, A = 255
});
}
public static ROMData LoadFromDisk(ROMSet romset, string directoryPath, bool enforceValidChecksum = true)
{
var romData = new ROMData();
List <ROMFile> romFiles = null;
if (romset == ROMSet.PacMan)
{
romFiles = ROMs.PAC_MAN;
}
else if (romset == ROMSet.MsPacMan)
{
romFiles = ROMs.MS_PAC_MAN;
}
else
{
throw new ArgumentException($"Unexpected romset: {romset}");
}
foreach (var romFile in romFiles)
{
var path = Path.Combine(directoryPath, romFile.FileName);
string alternatePath = null;
if (!String.IsNullOrWhiteSpace(romFile.AlternateFileName))
{
alternatePath = Path.Combine(directoryPath, romFile.AlternateFileName);
}
byte[] rom = null;
// Attempt to load the ROM file data from the primary and secondary file names.
if (File.Exists(path))
{
rom = File.ReadAllBytes(path);
}
if (!String.IsNullOrWhiteSpace(alternatePath) && File.Exists(alternatePath))
{
rom = File.ReadAllBytes(alternatePath);
}
var alternateFileNameMessage = romFile.AlternateFileName == null ? "" : $"(or alternate name '{romFile.AlternateFileName}')";
if (rom == null)
{
throw new Exception($"Could not locate the '{romFile.Description}' ROM file '{romFile.FileName}'{alternateFileNameMessage} with CRC32 of '{romFile.CRC32}' at the location: {path}");
}
// The ROM size should always match.
if (romFile.Size != rom.Length)
{
throw new Exception($"The file size for '{romFile.Description}' ROM file '{romFile.FileName}'{alternateFileNameMessage} at the location: {path} was {rom.Length} bytes, but we are expecting {romFile.Size} bytes.");
}
// Perform a quick checksum to determine if we got the correct file.
var crc32 = new CRC32();
var checksum = crc32.Get(rom).ToString("X8");
if (checksum != romFile.CRC32)
{
var message = $"The CRC32 checksum for '{romFile.Description}' ROM file '{romFile.FileName}'{alternateFileNameMessage} at the location: {path} was calculated as '{checksum}', but we are expecting '{romFile.CRC32}'.";
if (enforceValidChecksum)
{
throw new Exception(message);
}
else
{
Console.WriteLine($"[WARNING] {message}");
}
}
// Add the binary ROM data to the set indexed by file name.
romData.Data[romFile.FileName] = rom;
}
return(romData);
}
