public void Start()
{
// Get length
int cmos = 1;
DiskDriveRequest request = new DiskDriveRequest(DiskDrive.LEN, 0, 0);
southbridge.WriteToPort(cmos, request);
southbridge.ClockTick();
DiskDriveRequest result = southbridge.ReadFromPort <DiskDriveRequest>(cmos);
int length = (int)result.data;
int sectorSize = 512;
int chunks = length / sectorSize;
int rem = length % sectorSize;
List <byte> bios = new List <byte>();
// Get BIOS
for (int i = 0; i < chunks; i++)
{
request = new DiskDriveRequest(DiskDrive.READ, (uint)i * 512, 512);
southbridge.WriteToPort(cmos, request);
southbridge.ClockTick();
result = southbridge.ReadFromPort <DiskDriveRequest>(cmos);
bios.AddRange(result.diskData);
}
if (rem != 0)
{
request = new DiskDriveRequest(DiskDrive.READ, (uint)chunks * 512, (uint)rem);
southbridge.WriteToPort(cmos, request);
southbridge.ClockTick();
result = southbridge.ReadFromPort <DiskDriveRequest>(cmos);
bios.AddRange(result.diskData);
}
northbridge.WriteMemory(0, bios.ToArray(), (uint)bios.Count);
cpu.Start();
}
protected void WriteMemory()
{
if (Parent == null)
{
throw new Exception("Not connected to VM. Parent is null.");
}
if (Northbridge == null)
{
throw new Exception("Not connected to northbridge.");
}
uint16_t address = registers.Read <uint16_t>(Register.MAR);
uint16_t length = registers.Read <uint16_t>(Register.MLR);
byte[] value = new byte[0];
switch (length.Value)
{
case 8:
value = registers.Read(Register.MDR);
break;
case 4:
value = registers.Read(Register.MDR32);
break;
case 2:
value = registers.Read(Register.MDR16);
break;
case 1:
value = registers.Read(Register.MDR8);
break;
}
try
{
Northbridge.WriteMemory(address, value, (uint)value.Length);
}
catch (MemoryAccessException)
{
// Raise interrupt
SetFlag(CPUFlags.MemoryError);
}
}
