private bool ChecksumProgram()
{
Crc16 crc = new Crc16();
// bootsector
ushort chksumCalc = 0x0;
ushort chksumFile = 0x0;
ushort initial = 0;
byte[] Initial_Value = new byte[0x2];
Buffer.BlockCopy(sim.buffFull, 0x6066, Initial_Value, 0x0, 0x2);
Array.Reverse(Initial_Value);
initial = BitConverter.ToUInt16(Initial_Value, 0);
chksumCalc = BitConverter.ToUInt16(Initial_Value, 0);
// label5.Text = chksumCalc.ToString("X4"); // initial value
chksumFile = BitConverter.ToUInt16(sim.buffFull, 0x6050);
// label3.Text = chksumFile.ToString("X4");
// all ms41`s
chksumCalc = crc.CCB(sim.buffFull, 0x06100, FindCheckEnd(sim.buffFull, 0x7FFF), chksumCalc);
chksumCalc = crc.CCB(sim.buffFull, 0x00000, FindCheckEnd(sim.buffFull, 0x3FFF), chksumCalc);
// must be 8 parts
//chksumCalc = crc.CCB(sim.buffFull1, 0x20000, FindCheckEnd(sim.buffFull1, 0x3FFFF), chksumCalc);
byte[] buf = new byte[0x20000]; // rearange memory for checksum calculation
Buffer.BlockCopy(sim.buffFull, 0x24000, buf, 0x00000, 0x4000);
Buffer.BlockCopy(sim.buffFull, 0x20000, buf, 0x04000, 0x4000);
Buffer.BlockCopy(sim.buffFull, 0x2c000, buf, 0x08000, 0x4000);
Buffer.BlockCopy(sim.buffFull, 0x28000, buf, 0x0C000, 0x4000);
Buffer.BlockCopy(sim.buffFull, 0x34000, buf, 0x10000, 0x4000);
Buffer.BlockCopy(sim.buffFull, 0x30000, buf, 0x14000, 0x4000);
Buffer.BlockCopy(sim.buffFull, 0x3c000, buf, 0x18000, 0x4000);
Buffer.BlockCopy(sim.buffFull, 0x38000, buf, 0x1C000, 0x4000);
chksumCalc = crc.CCB(buf, 0x00000, FindCheckEnd(buf, 0x1FFFF), chksumCalc);
if (chksumFile != chksumCalc)
{
byte[] update = new byte[0x2];
update = BitConverter.GetBytes(chksumCalc);
sim.buffFull[0x6050] = update[0x00];
sim.buffFull[0x6051] = update[0x01];
richTextBox1.Text += "Checksum ProgramSec -- Value: " + chksumFile.ToString("X4") + " Comp: " + chksumCalc.ToString("X4") + "\t\t\t(Checksum ERROR)\r\n" + "\r\n";
toolStripMenuItem3.Enabled = true;
toolStripMenuItem2.Enabled = true;
return(true);
}
richTextBox1.Text += "Checksum ProgramSec -- Value: " + chksumFile.ToString("X4") + " Comp: " + chksumCalc.ToString("X4") + "\t\t\t(Checksum OK)\r\n";
return(false);
}
public bool ChecksumBootSector()
{
// bootsector
Crc16 crc = new Crc16();
ushort chksumCalc = 0x4711; // hardcoded initial value
int chksumFile = BitConverter.ToUInt16(sim.buffFull, 0x5C80);
chksumCalc = crc.CCB(sim.buffFull, 0x4000, 0x5C14, chksumCalc);
if (chksumFile != chksumCalc)
{
byte[] update = new byte[0x2];
update = BitConverter.GetBytes(chksumCalc);
sim.buffFull[0x5C80] = update[0x00];
sim.buffFull[0x5C81] = update[0x01];
richTextBox1.Text += "Checksum Bootsector -- Value: " + chksumFile.ToString("X4") + " Comp: " + chksumCalc.ToString("X4") + "\t\t\t(Checksum ERROR)\r\n";
toolStripMenuItem3.Enabled = true;
toolStripMenuItem2.Enabled = true;
return(true);
}
richTextBox1.Text += "Checksum Bootsector -- Value: " + chksumFile.ToString("X4") + " Comp: " + chksumCalc.ToString("X4") + "\t\t\t(Checksum OK)\r\n";
return(false);
}
