/// <summary>
/// Reads the Cartridge ROM
/// </summary>
/// <param name="startAddress">The start address</param>
/// <param name="length">The length to read</param>
/// <returns></returns>
private static byte[] RomRead(uint startAddress, int length)
{
CommandPacketTransmit(TransmitCommand.RomRead, startAddress, length, 0);
UsbInterface.ProgressBarTimerInterval = length > MAX_ROM_SIZE / 2 ? 0x100000 : 0x80000;
var time = DateTime.Now.Ticks;
var data = UsbInterface.Read(length);
time = DateTime.Now.Ticks - time;
Console.WriteLine($"OK. speed: {GetSpeedString(data.Length, time)}"); //TODO: this should be in the main program! or at least return the time!
return(data);
}
/// <summary>
/// Receives a command response from the USB port
/// </summary>
/// <returns>the full response in bytes</returns>
private static byte[] CommandPacketReceive()
{
var cmd = UsbInterface.Read(16);
if (Encoding.ASCII.GetString(cmd).ToLower().StartsWith("cmd") || Encoding.ASCII.GetString(cmd).ToLower().StartsWith("RSP"))
{
switch ((ReceiveCommand)cmd[3])
{
case ReceiveCommand.CommsReply:
return(cmd);
case ReceiveCommand.CommsReplyLegacy: //Certain ROM's may reply that used the old OSes without case sensitivity on the test commnad, this ensures they are handled.
throw new Exception($"Outdated OS, please update to {MINIMUM_OS_VERSION} or above!");
default:
throw new Exception("Unexpected response received from USB port.");
}
}
else
{
throw new Exception("Corrupted response received from USB port.");
}
}