#pragma warning restore CS0162
/*
* /// <summary>
* /// Leaves the serial connection open
* /// Will attempt to detect /HALT notifications from Unirom
* /// and catch crash/exception events
* /// </summary>
* public static void DoMonitor(){
*
* // Note:
* // Mono hasn't implemented the activeSerial.ReceivedBytesThreshold methods yet
* // so we can't really use events. Instead the max we'll wait is 1ms to enter the
* // tight inner loop. Should be fine if you're not filling a ~2kb buffer in 1ms
*
* // a rolling buffer of the last 4 things recieved
* string lastMonitorBytes = "";
*
* while (true)
* {
*
* while (activeSerial.BytesToRead > 0)
* {
*
* // echo things to the screen
*
* int responseByte = activeSerial.ReadByte();
* Console.Write((char)(responseByte));
*
* // check if the PSX has crashed
*
* // TODO: use a more appropriate data collection, lol
* lastMonitorBytes += (char)responseByte;
* while ( lastMonitorBytes.Length > 4 )
* lastMonitorBytes = lastMonitorBytes.Remove( 0, 1 );
*
* if ( lastMonitorBytes == "HLTD" ){
*
* while ( true ){
*
* Console.WriteLine( "\nThe PSX may have crashed, enter debug mode? (y/n)" );
* Console.WriteLine( "(Also starts a TCP/SIO bridge on port 3333." );
* ConsoleKeyInfo c = Console.ReadKey();
* if ( c.KeyChar.ToString().ToLowerInvariant() == "y" ){
* GDB.GetRegs();
* GDB.DumpRegs();
* GDB.Init( 3333 );
* return;
* } else {
* Console.WriteLine( "\nReturned to monitor mode." );
* break;
* }
*
* }
*
*
* }
*
* }
*
* Thread.Sleep( 1 );
*
* }
*
*
* }
*/
/// <summary>
/// Puts Unirom into /debug mode and wipes everything from the end of the kernel
/// to the stack, where it will crash.
// 0x80010000 -> 0x801FFF??
/// </summary>
/// <param name="wipeValue">32 bit value to fill ram with</param>
/// <returns></returns>
public static bool Command_WipeMem(UInt32 wipeAddress, UInt32 wipeValue)
{
// if it returns true, we might enter /m (monitor) mode, etc
if (
!TransferLogic.ChallengeResponse(CommandMode.DEBUG)
)
{
Console.WriteLine("Couldn't determine if Unirom is in debug mode.");
return(false);
}
Thread.Sleep(200);
byte[] buffer = new byte[0x80200000 - wipeAddress]; // just shy of 2MB
for (int i = 0; i < buffer.Length / 4; i++)
{
BitConverter.GetBytes(wipeValue).CopyTo(buffer, i * 4);
}
Command_SendBin(wipeAddress, buffer);
// It won't return.
return(true);
}
public static void DebugInit(UInt32 localPort)
{
Console.WriteLine("Checking if Unirom is in debug mode...");
// if it returns true, we might enter /m (monitor) mode, etc
if (
!TransferLogic.ChallengeResponse(CommandMode.DEBUG)
)
{
Console.WriteLine("Couldn't determine if Unirom is in debug mode.");
return;
}
Console.WriteLine("Grabbing initial state...");
TransferLogic.Command_DumpRegs();
Console.WriteLine("Monitoring sio...");
Console.WriteLine("********************** WARNING ***************************");
Console.WriteLine("THE TCP BRIDGE DOES NOT CURRENTLY ACCEPT COMMANDS FROM GDB");
Console.WriteLine("********************** ******* ***************************");
Init(localPort);
}
//
// Memcard Functions
//
/// <summary>
/// Writes an entire memcard's contents
/// </summary>
/// <param name="inCard">0/1</param>
public static bool Command_MemcardUpload(UInt32 inCard, byte[] inFile)
{
if (!TransferLogic.ChallengeResponse(CommandMode.MCUP))
{
return(Error("No response from Unirom. Are you using 8.0.E or higher?"));
}
Console.WriteLine("Uploading card data...");
// send the card number
activeSerial.Write(BitConverter.GetBytes(inCard), 0, 4);
// file size in bytes, let unirom handle it
activeSerial.Write(BitConverter.GetBytes(inFile.Length), 0, 4);
activeSerial.Write(BitConverter.GetBytes(CalculateChecksum(inFile)), 0, 4);
if (TransferLogic.WriteBytes(inFile, false))
{
Console.WriteLine("File uploaded, check your screen...");
}
else
{
return(Error("Couldn't upload to unirom - no write attempt will be made", false));
}
return(true);
}
/// <summary>
/// Reads and dumps a memcard to disc
/// </summary>
/// <param name="inCard">0/1</param>
public static bool Command_MemcardDownload(UInt32 inCard, string fileName)
{
if (!TransferLogic.ChallengeResponse(CommandMode.MCDOWN))
{
return(Error("No response from Unirom. Are you using 8.0.E or higher?"));
}
// send the card number
activeSerial.Write(BitConverter.GetBytes(inCard), 0, 4);
Console.WriteLine("Reading card to ram...");
// it'll send this when it's done dumping to ram
if (!TransferLogic.WaitResponse("MCRD", false))
{
return(Error("Please see screen or SIO for error!"));
}
Console.WriteLine("Ready, reading....");
UInt32 addr = TransferLogic.read32();
Console.WriteLine("Data is 0x" + addr.ToString("x"));
UInt32 size = TransferLogic.read32();
Console.WriteLine("Size is 0x" + size.ToString("x"));
Console.WriteLine("Dumping...");
byte[] lastReadBytes = new byte[size];
TransferLogic.ReadBytes(addr, size, lastReadBytes);
if (System.IO.File.Exists(fileName))
{
string newFilename = fileName + GetSpan().TotalSeconds.ToString();
Console.Write("\n\nWARNING: Filename " + fileName + " already exists! - Dumping to " + newFilename + " instead!\n\n");
fileName = newFilename;
}
try
{
File.WriteAllBytes(fileName, lastReadBytes);
}
catch (Exception e)
{
return(Error("Couldn't write to the output file + " + fileName + " !\nThe error returned was: " + e, false));
}
Console.WriteLine("File written to: " + fileName);
Console.WriteLine("It is raw .mcd format used by PCSX-redux, no$psx, etc");
return(true);
}
// final method that handles msg from the source, whether it's from wndproc or callbacks
void HandleSourceMsg(Message msg)
{
PlatformInfo.Current.Log.Debug("Got TWAIN msg " + msg);
switch (msg)
{
case Message.XferReady:
if (State < 6)
{
State = 6;
}
TransferLogic.DoTransferRoutine(this);
break;
case Message.DeviceEvent:
TWDeviceEvent de;
var rc = ((ITwainSessionInternal)this).DGControl.DeviceEvent.Get(out de);
if (rc == ReturnCode.Success)
{
SafeSyncableRaiseOnEvent(OnDeviceEvent, DeviceEvent, new DeviceEventArgs(de));
}
break;
case Message.CloseDSReq:
case Message.CloseDSOK:
DisableReason = msg;
// even though it says closeDS it's really disable.
// dsok is sent if source is enabled with uionly
// some sources send this at other states so do a step down
if (State > 5)
{
// rather than do a close here let the transfer logic handle the close down now
//ForceStepDown(4);
_closeRequested = true;
}
else if (State == 5)
{
// needs this state check since some source sends this more than once
((ITwainSessionInternal)this).DisableSource();
}
break;
}
}
public static bool SetRegs()
{
// read the pointer to TCB[0]
byte[] ptrBuffer = new byte[4];
if (!TransferLogic.ReadBytes(0x80000110, 4, ptrBuffer))
{
return(false);
}
UInt32 tcbPtr = BitConverter.ToUInt32(ptrBuffer, 0);
Console.WriteLine("TCB PTR " + tcbPtr.ToString("X"));
// Convert regs back to a byte array and bang them back out
byte[] tcbBytes = new byte[TCB_LENGTH_BYTES];
Buffer.BlockCopy(tcb.regs, 0, tcbBytes, 0, TCB_LENGTH_BYTES);
TransferLogic.Command_SendBin(tcbPtr, tcbBytes);
return(true);
}
public static bool GetRegs()
{
// read the pointer to TCB[0]
byte[] ptrBuffer = new byte[4];
if (!TransferLogic.ReadBytes(0x80000110, 4, ptrBuffer))
{
return(false);
}
UInt32 tcbPtr = BitConverter.ToUInt32(ptrBuffer, 0);
Console.WriteLine("TCB PTR " + tcbPtr.ToString("X"));
byte[] tcbBytes = new byte[TCB_LENGTH_BYTES];
if (!TransferLogic.ReadBytes(tcbPtr, (int)GPR.COUNT * 4, tcbBytes))
{
return(false);
}
Buffer.BlockCopy(tcbBytes, 0, tcb.regs, 0, tcbBytes.Length);
return(true);
}
public static void Init()
{
Console.WriteLine("Checking if Unirom is in debug mode...");
// if it returns true, we might enter /m (monitor) mode, etc
if (
!TransferLogic.ChallengeResponse(CommandMode.DEBUG)
)
{
Console.WriteLine("Couldn't determine if Unirom is in debug mode.");
return;
}
Console.WriteLine("Grabbing initial state...");
TransferLogic.Command_DumpRegs();
Console.WriteLine("Monitoring sio...");
InitSocket();
MonitorSIOAndSocket();
}
/// <summary>
/// We've parsed everything from stdin, let's start processing it.
/// </summary>
/// <returns>success?</returns>
private static bool DoStuff()
{
PrintUsage(true);
//
// Process the secondary/standalone commands
// /fast, /slow, /m, etc
//
if (enterFastMode)
{
// start in normal mode and send a "FAST" command
// unirom doesn't have to respond, so if it's already in fast mode, no biggie
if (!NewSIO(SIOSPEED.SLOW))
{
return(false);
}
// The bytes "FAST" with no null terminator
activeSerial.Write(BitConverter.GetBytes(0x54534146), 0, 4);
Thread.Sleep(100);
// Switch to fast
if (!NewSIO(SIOSPEED.FAST))
{
return(false);
}
}
else if (enterSlowMode)
{
// As above, but returns to 115200 so you don't have to 'nops /fast' all the time
// going to assume Unirom's in fast mode.. so start there and negotiate back down
if (!NewSIO(SIOSPEED.FAST))
{
return(false);
}
// The bytes "FAST" with no null terminator
activeSerial.Write(BitConverter.GetBytes(0x574F4C53), 0, 4);
Thread.Sleep(100);
// Now switch back
if (!NewSIO(SIOSPEED.SLOW))
{
return(false);
}
}
else
{
if (!NewSIO(SIOSPEED.SLOW))
{
return(false);
}
}
// If we got /m on its own
if (monitorComms && argCommand == CommandMode.NOT_SET)
{
GDB.MonitorSerialToSocket();
return(true);
}
// we just did 'nops /fast /m' or something
if (allArgsAreSecondary)
{
return(true);
}
//
// A little cleanup...
//
if (usingCachedComPort)
{
Console.WriteLine("Using port " + argComPort + " from comport.txt\n");
}
// Clear the SIO buffer incase the last program has been spamming
Console.WriteLine("Emptying buffer... ");
while (activeSerial.BytesToRead != 0)
{
Console.Write("" + (char)activeSerial.ReadByte());
}
Console.WriteLine("...done!\n\n");
//
// Process the primary commands
//
// Upload
if (argCommand == CommandMode.SEND_EXE)
{
TransferLogic.Command_SendEXE(inFile);
}
if (argCommand == CommandMode.SEND_BIN)
{
TransferLogic.Command_SendBin(argAddr, inFile);
}
if (argCommand == CommandMode.SEND_ROM)
{
TransferLogic.Command_SendROM(argAddr, inFile);
}
// Program flow
if (argCommand == CommandMode.JUMP_JMP)
{
TransferLogic.Command_JumpAddr(argAddr);
}
if (argCommand == CommandMode.JUMP_CALL)
{
TransferLogic.Command_CallAddr(argAddr);
}
// Pokeypoke
if (argCommand == CommandMode.POKE8)
{
byte[] bytes = { (byte)(argValue & 0xFF) };
TransferLogic.Command_SendBin(argAddr, bytes);
}
if (argCommand == CommandMode.POKE16)
{
short shorty = (byte)(argValue & 0xFFFF);
byte[] bytes = BitConverter.GetBytes(shorty);
TransferLogic.Command_SendBin(argAddr, bytes);
}
if (argCommand == CommandMode.POKE32)
{
byte[] bytes = BitConverter.GetBytes(argValue);
TransferLogic.Command_SendBin(argAddr, bytes);
}
// Utility
if (argCommand == CommandMode.PING)
{
TransferLogic.ChallengeResponse(argCommand);
}
if (argCommand == CommandMode.RESET)
{
TransferLogic.WriteChallenge(argCommand.challenge());
}
// Debug functions
if (argCommand == CommandMode.DEBUG)
{
// if it returns true, we might enter /m (monitor) mode, etc
if (
!TransferLogic.ChallengeResponse(argCommand)
)
{
return(false);
}
}
if (argCommand == CommandMode.HALT)
{
TransferLogic.ChallengeResponse(argCommand);
}
if (argCommand == CommandMode.CONT)
{
TransferLogic.ChallengeResponse(argCommand);
}
if (argCommand == CommandMode.REGS)
{
TransferLogic.Command_DumpRegs();
}
if (argCommand == CommandMode.SETREG)
{
if (!TransferLogic.Command_SetReg(argRegister, argValue))
{
return(Error("Couldn't set reg " + argRegister + " to " + argValue, false));
}
}
// Hook functions
if (
argCommand == CommandMode.HOOKREAD ||
argCommand == CommandMode.HOOKWRITE ||
argCommand == CommandMode.HOOKEXEC
)
{
if (TransferLogic.ChallengeResponse(argCommand))
{
activeSerial.Write(BitConverter.GetBytes(argAddr), 0, 4);
}
}
// Memory card
if (argCommand == CommandMode.MCUP)
{
if (!TransferLogic.Command_MemcardUpload(argCard, inFile))
{
return(false);
}
}
if (argCommand == CommandMode.WIPEMEM)
{
if (!TransferLogic.Command_WipeMem(argAddr, argValue))
{
return(false);
}
}
if (argCommand == CommandMode.MCDOWN)
{
if (!TransferLogic.Command_MemcardDownload(argCard, argFileName))
{
return(false);
}
}
// Peek / Read functions
if (argCommand == CommandMode.DUMP)
{
if (!TransferLogic.Command_Dump(argAddr, argSize))
{
return(false);
}
}
if (argCommand == CommandMode.WATCH)
{
TransferLogic.Watch(argAddr, argSize);
return(true);
}
//
// Major work in progress
//
if (argCommand == CommandMode.GDB)
{
GDB.DebugInit(argPort);
}
if (argCommand == CommandMode.BRIDGE)
{
GDB.Init(argPort);
}
//
// All done, are we leaving the comms monitor open?
//
if (monitorComms)
{
GDB.MonitorSerialToSocket();
}
else
{
Console.WriteLine("\n Bye!");
activeSerial.Close();
}
return(true);
} // void Transfer
private static bool Transfer()
{
PrintUsage(true);
activeSerial = new SerialPort(argComPort, 115200, Parity.None, 8, StopBits.Two);
// Required for e.g. SharkLink & Yaroze cable compat. Doesn't interfere with the 3-wire setups
activeSerial.Handshake = Handshake.None;
activeSerial.DtrEnable = true;
activeSerial.RtsEnable = true;
if (fastMode)
{
activeSerial.ReadTimeout = TIMEOUT;
activeSerial.WriteTimeout = TIMEOUT;
try {
activeSerial.Open();
} catch (Exception exception) {
Console.WriteLine("Error opening temporary serial port on " + argComPort + "!");
Console.WriteLine(exception.Message);
return(false);
}
// The bytes "FAST" with no null terminator
activeSerial.Write(BitConverter.GetBytes(0x54534146), 0, 4);
Thread.Sleep(100);
activeSerial.Close();
// We need to find a suitable overlap in frequencies which can be divided
// from the Playstation's clock and from the FTDI/clone, with some wiggle room.
//
// PSX/libs uses whole integer divisions of 2073600 for anything over 115200
// giving us 518400 close to the half-megabyte mark.
//
// Most FTDI/clones seem to operate in 2xinteger divisions of 48mhz
// giving us 510000 or 521000 close to the half-megabyte mark. e.g. (48m/47/2) or (48m/46/2)
//
// 5210000 (and even 518400) is a little fast, but the lower end
// of things (510000 to 518300) seems pretty stable.
//
// note: psx @ 518400, pc @ 510000
//
activeSerial = new SerialPort(argComPort, 510000, Parity.None, 8, StopBits.Two);
// Required for e.g. SharkLink & Yaroze cable compat. Doesn't interfere with the 3-wire setups
activeSerial.Handshake = Handshake.None;
activeSerial.DtrEnable = true;
activeSerial.RtsEnable = true;
}
// Now the main serial port
activeSerial.ReadTimeout = TIMEOUT;
activeSerial.WriteTimeout = TIMEOUT;
try {
activeSerial.Open();
} catch (Exception exception) {
Console.WriteLine("Error opening the serial port on " + argComPort + "!");
Console.WriteLine(exception.Message);
return(false);
}
// just lets us skip a ton of ifs
if (monitorComms && argCommand == CommandMode.NOT_SET)
{
TransferLogic.DoMonitor();
return(true);
}
if (usingCachedComPort)
{
Console.WriteLine("Using port " + argComPort + " from comport.txt\n");
}
// Clear the SIO buffer incase the last program has been spamming
Console.WriteLine("Emptying buffer... ");
while (activeSerial.BytesToRead != 0)
{
Console.Write("" + (char)activeSerial.ReadByte());
}
Console.WriteLine("...done!\n\n");
if (argCommand == CommandMode.SEND_EXE)
{
TransferLogic.Command_SendEXE(argAddr, inFile, CalculateChecksum(inFile, true));
}
if (argCommand == CommandMode.SEND_BIN)
{
TransferLogic.Command_SendBin(argAddr, inFile, CalculateChecksum(inFile));
}
// Unirom 8 mode - requires a response after checking that
// things will fit on the cart.
if (argCommand == CommandMode.SEND_ROM)
{
TransferLogic.Command_SendROM(argAddr, inFile, CalculateChecksum(inFile));
}
if (argCommand == CommandMode.RESET)
{
TransferLogic.WriteChallenge(argCommand.challenge());
}
// Unirom 8.0.4 and up, enables kernel-resident SIO
if (argCommand == CommandMode.DEBUG)
{
// if it returns true, we might enter /m (monitor) mode, etc
if (
!TransferLogic.ChallengeResponse(argCommand)
)
{
return(false);
}
}
if (argCommand == CommandMode.DUMP)
{
lastReadBytes = new byte[argSize];
TransferLogic.Command_DumpBytes(argAddr, argSize, lastReadBytes);
string fileName = "DUMP_" + argAddr.ToString("X8") + "_to_" + argSize.ToString("X8") + ".bin";
if (System.IO.File.Exists(fileName))
{
string newFilename = fileName + GetSpan().TotalSeconds.ToString();
Console.Write("\n\nWARNING: Filename " + fileName + " already exists! - Dumping to " + newFilename + " instead!\n\n");
fileName = newFilename;
}
try{
File.WriteAllBytes(fileName, lastReadBytes);
} catch (Exception e) {
Error("Couldn't write to the output file + " + fileName + " !\nThe error returned was: " + e, false);
return(false);
}
} // DUMP
if (argCommand == CommandMode.PING)
{
TransferLogic.ChallengeResponse(argCommand);
}
if (argCommand == CommandMode.GDB)
{
GDB.Init();
}
if (argCommand == CommandMode.JUMP_JMP)
{
TransferLogic.Command_JumpAddr(argAddr);
}
if (argCommand == CommandMode.JUMP_CALL)
{
TransferLogic.Command_CallAddr(argAddr);
}
if (argCommand == CommandMode.HALT)
{
TransferLogic.ChallengeResponse(argCommand);
}
if (argCommand == CommandMode.CONT)
{
TransferLogic.ChallengeResponse(argCommand);
}
if (argCommand == CommandMode.REGS)
{
TransferLogic.Command_DumpRegs();
}
if (argCommand == CommandMode.SETREG)
{
TransferLogic.Command_SetReg(argRegister, argAddr);
}
if (argCommand == CommandMode.WATCH)
{
TransferLogic.Watch(argAddr, argSize);
return(true);
} // WATCH
if (monitorComms)
{
TransferLogic.DoMonitor();
}
else
{
Console.WriteLine("\n This is where we part ways!");
activeSerial.Close();
}
return(true);
} // void Transfer
/// <summary>
/// The monitor recieved 0x00, 'p' ...
/// Read the command ID bytes following that and process them.
/// </summary>
public static bool ReadCommand()
{
Console.WriteLine("Got PCDRV ...");
// Wait till we get the PCDrv function code
while (serial.BytesToRead == 0)
{
}
PCDrvCodes funcCode = (PCDrvCodes)TransferLogic.read32();
Console.WriteLine("Got function code: " + funcCode);
// TODO: split these off into discrete functions?
// PCInit
if (funcCode == PCDrvCodes.PCINIT_101)
{
serial.Write("OKAY");
serial.Write(new byte[] { 0 }, 0, 1);
return(true);
}
// PCCreat
if (funcCode == PCDrvCodes.PCCREAT_102)
{
// tell unirom to start with the filename, etc
serial.Write("OKAY");
string fileName = GetFilename();
if (fileName == "")
{
return(false);
}
UInt32 parameters = TransferLogic.read32();
bool isDir = ((parameters & 16) != 0);
Console.WriteLine($"PCCreat( {fileName}, {parameters} )");
PCFile pcFile = GetOpenFile(fileName);
if (pcFile != null)
{
// We're already tracking this file, just return it's handle
Console.WriteLine("File already open, handle=" + pcFile.handle);
serial.Write("OKAY");
serial.Write(BitConverter.GetBytes(pcFile.handle), 0, 4);
return(true);
}
FileStream fStream;
try {
if (isDir)
{
throw new Exception("Directories are not supported!");
}
else
{
if (!File.Exists(fileName))
{
FileStream tempStream = File.Create(fileName);
tempStream.Flush();
tempStream.Close();
tempStream.Dispose();
}
else
{
Console.WriteLine($"File {fileName} already exists, using that...");
}
fStream = new FileStream(fileName, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
}
// open it read/write until otherwise specified via PCOpen
UInt32 handle = NextHandle();
TrackFile(fileName, handle, fStream, PCFileMode.READWRITE);
serial.Write("OKAY");
serial.Write(BitConverter.GetBytes(handle), 0, 4);
return(true);
} catch (Exception e) {
Console.WriteLine($"Error creating file '{fileName}', ex={e}");
serial.Write("NOPE");
return(false);
}
} // PCCREAT_102
// PCOpen
if (funcCode == PCDrvCodes.PCOPEN_103)
{
serial.Write("OKAY");
string fileName = GetFilename();
if (fileName == "")
{
return(false);
}
PCFileMode fileModeParams = (PCFileMode)TransferLogic.read32();
Console.WriteLine($"PCOpen( {fileName}, {fileModeParams} )");
PCFile f = GetOpenFile(fileName);
if (f != null)
{
// just return the handle for this file...
if (f.fileMode != fileModeParams)
{
Console.WriteLine($"File {f.handle} already open, switching params to {fileModeParams}");
f.fileMode = fileModeParams;
}
else
{
Console.WriteLine("File already open, handle=" + f.handle);
}
serial.Write("OKAY");
serial.Write(BitConverter.GetBytes(f.handle), 0, 4);
return(true);
}
if (!File.Exists(fileName))
{
Console.WriteLine("File doesn't exist!");
goto nope;
}
FileStream fs = null;
try{
fs = File.Open(fileName, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
} catch (Exception e) {
Console.WriteLine($"Error opening file '{fileName}', ex={e}");
goto nope;
}
UInt32 handle = NextHandle();
TrackFile(fileName, handle, fs, fileModeParams);
Console.WriteLine("Returning file, handle=" + handle);
serial.Write("OKAY");
serial.Write(BitConverter.GetBytes(handle), 0, 4);
return(true);
nope :;
Console.WriteLine("Failed..");
serial.Write("NOPE");
return(false);
} // PCOPEN_103
// PCClose
if (funcCode == PCDrvCodes.PCCLOSE_104)
{
serial.Write("OKAY");
// unirom sends extra params to save kernel
// space by grouping similar commands together.
UInt32 handle = TransferLogic.read32();
UInt32 unused1 = TransferLogic.read32();
UInt32 unused2 = TransferLogic.read32();
Console.WriteLine($"PCClose( {handle} ) unusedParams: {unused1},{unused2}");
PCFile f = GetOpenFile(handle);
try{
if (f == null)
{
Console.WriteLine("No such file... great success!");
serial.Write("OKAY"); // v0
serial.Write(BitConverter.GetBytes(0), 0, 4); // v1
return(true);
}
else
{
Console.WriteLine($"Closing file {f.fileName} with handle {f.handle}...");
serial.Write("OKAY"); // v0
serial.Write(BitConverter.GetBytes(f.handle), 0, 4); // v1 // let the garbage collector deal with it
ClosePCFile(f.handle);
return(true);
}
} catch (Exception e) {
Console.WriteLine("Error closing file..." + e);
serial.Write("NOPE"); // v0
// don't need to send v1
return(false);
}
} // PCCLOSE_104
// PCRead
if (funcCode == PCDrvCodes.PCREAD_105)
{
serial.Write("OKAY");
// unirom sends extra params to save kernel
// space by grouping similar commands together,
// so 'memaddr' is for debugging only.
// PCRead() takes (handle, buff*, len )
// but interally passes it to _SN_Read as
// ( 0, handle, len, buff* ), essentially
// shuffling regs A0,A1,A2 into A1,A3,A2.
// or just ( handle, len, buff* ). lol.
UInt32 handle = TransferLogic.read32();
int inLength = (int)TransferLogic.read32();
UInt32 memaddr = TransferLogic.read32(); // not used, debugging only
//Console.WriteLine( $"PCRead( {handle}, len={inLength}, dbg=0x{memaddr.ToString("X")} )" );
PCFile pcFile = GetOpenFile(handle);
Console.WriteLine($"PCRead( {handle}, len=0x{inLength.ToString("X")} ); MemAddr=0x{memaddr.ToString("X")}, File={pcFile}");
if (pcFile == null)
{
Console.WriteLine($"No file with handle 0x{handle.ToString("X")}, returning!");
serial.Write("NOPE"); // v0
// don't need to send v1
return(false);
}
else
{
Console.WriteLine("Reading file " + pcFile.fileName);
}
long streamLength = 0;
try{
FileStream fs = pcFile.fileStream;
streamLength = fs.Length;
byte[] bytes = new byte[inLength];
int bytesRead = fs.Read(bytes, 0, inLength);
if (bytesRead <= 0)
{
//throw new Exception( "Read 0 bytes from the file.." );
Console.WriteLine("Warning - no bytes were read from the file - returning zeros...");
}
// if we returned fewer bytes than requested, no biggie, the byte array is already set
serial.Write("OKAY"); // v0
serial.Write(BitConverter.GetBytes(bytes.Length), 0, 4); // v1
// Then
UInt32 check = TransferLogic.CalculateChecksum(bytes, false);
serial.Write(BitConverter.GetBytes(check), 0, 4);
TransferLogic.WriteBytes(bytes, false, true);
// again the weird order reflects a desire to save space within the psx kernel
// and reuse some functions
} catch (Exception e) {
Console.WriteLine($"Error reading file {pcFile.fileName} at pos={pcFile.fileStream.Position}, streamLength={streamLength} e={e}");
serial.Write("NOPE");
return(false);
}
} // PCREAD_105
// PCWrite
if (funcCode == PCDrvCodes.PCWRITE_106)
{
serial.Write("OKAY");
// PCWrite() takes (handle, buff*, len )
// but interally passes it to _SN_Write as
// ( 0, handle, len, buff* ), essentially
// shuffling regs A0,A1,A2 into A1,A3,A2.
// or just ( handle, len, buff* ). lol.
UInt32 handle = TransferLogic.read32();
int inLength = (int)TransferLogic.read32();
UInt32 memaddr = TransferLogic.read32(); // not used, debugging only
PCFile pcFile = GetOpenFile(handle);
if (pcFile == null)
{
Console.WriteLine($"No file with handle 0x{handle.ToString("X")}, returning!");
serial.Write("NOPE"); // v0
// don't need to send v1
return(false);
}
Console.WriteLine($"PCWrite( {handle}, len={inLength} ); fileName={pcFile.fileName} SourceAddr={memaddr.ToString( "X" )}, File={pcFile}");
if (pcFile.fileMode == PCFileMode.READONLY)
{
Console.WriteLine("Error: File is readonly!");
serial.Write("NOPE");
return(false);
}
serial.Write("OKAY");
try {
FileStream fs = pcFile.fileStream;
byte[] bytes = new byte[inLength];
bool didRead = TransferLogic.ReadBytes_Raw((UInt32)inLength, bytes);
if (!didRead)
{
throw new Exception("there was an error reading the stream from the psx!");
}
Console.WriteLine($"Read {inLength} bytes, flushing to {pcFile.fileName}...");
fs.Write(bytes, 0, inLength);
fs.Flush(true);
serial.Write("OKAY"); // v0
serial.Write(BitConverter.GetBytes(bytes.Length), 0, 4); // v1
// again the weird order reflects a desire to save space within the psx kernel
// and reuse some functions
} catch (Exception e) {
Console.WriteLine($"Error writing file {pcFile.fileName}, streamLength={inLength} e={e}");
serial.Write("NOPE");
return(false);
}
return(true);
} //PCWRITE 106
if (funcCode == PCDrvCodes.PCSEEK_107)
{
serial.Write("OKAY");
UInt32 handle = TransferLogic.read32();
int seekPos = (int)TransferLogic.read32();
SeekOrigin seekOrigin = (SeekOrigin)TransferLogic.read32();
PCFile pcFile = GetOpenFile(handle);
string fileName = pcFile != null ? pcFile.fileName : "";
Console.WriteLine($"PCSeek file {handle} to {seekPos}, type={seekOrigin}, fileName={fileName}");
if (pcFile == null)
{
Console.WriteLine("Error: There is no file with handle 0x" + handle.ToString("X"));
serial.Write("NOPE");
return(false);
}
// Let's actually open the file and seek it to see if we bump into any issues
try {
FileStream fs = pcFile.fileStream;
//fs.Seek( pcFile.filePointer, pcFile.seekMode );
fs.Seek(seekPos, seekOrigin);
Console.WriteLine("Seeked position " + fs.Position);
serial.Write("OKAY");
serial.Write(BitConverter.GetBytes(fs.Position), 0, 4);
} catch (System.Exception e) {
Console.WriteLine($"Exception when seeking file {handle}, e={e}");
serial.Write("NOPE");
return(false);
}
} //PCSEEK_107
return(true);
}