public string InitDisk()
{
ch.WriteCommand(CMD_TEST_CONNECT);
byte status;
do
{
status = ch.ReadStatus();
} while (status == 0);
var result = (UsbPacketResult)(status & 0x7F); // WaitAndGetResult();
if (result == UsbPacketResult.NoDeviceConnected)
{
return("*** No device connected");
}
BusResetAndSetHostWithSofMode();
ch.WriteCommand(CMD_DISK_MOUNT);
result = WaitAndGetResult();
if (result != UsbPacketResult.Ok)
{
return("*** No proper storage device connected");
}
var data = new byte[36];
ReadUsbData(data, 0);
return(Encoding.ASCII.GetString(data.Skip(8).ToArray()));
}
private void Cpu_MemoryAccess(object sender, MemoryAccessEventArgs e)
{
if (e.Address == 0x20)
{
if (e.EventType == MemoryAccessEventType.BeforePortRead)
{
e.CancelMemoryAccess = true;
if (waitingMultiDataTransferLength)
{
waitingMultiDataTransferLength = false;
e.Value = chPorts.ReadData();
multiDataTransferRemaining = e.Value;
multiDataTransferPointer = 0;
if (e.Value > 0)
{
multiDataTransferBuffer = chPorts.ReadMultipleData(multiDataTransferRemaining);
}
}
else if (multiDataTransferRemaining > 0)
{
e.Value = multiDataTransferBuffer[multiDataTransferPointer];
multiDataTransferPointer++;
multiDataTransferRemaining--;
}
else
{
e.Value = chPorts.ReadData();
}
}
else if (e.EventType == MemoryAccessEventType.BeforePortWrite)
{
e.CancelMemoryAccess = true;
if (waitingMultiDataTransferLength)
{
waitingMultiDataTransferLength = false;
multiDataTransferBuffer = new byte[e.Value];
multiDataTransferPointer = 0;
multiDataTransferRemaining = e.Value;
chPorts.WriteData(e.Value);
}
else if (multiDataTransferRemaining > 0)
{
multiDataTransferBuffer[multiDataTransferPointer] = e.Value;
multiDataTransferPointer++;
multiDataTransferRemaining--;
if (multiDataTransferRemaining == 0)
{
chPorts.WriteMultipleData(multiDataTransferBuffer);
}
}
else
{
chPorts.WriteData(e.Value);
}
}
}
else if (e.Address == 0x21)
{
if (e.EventType == MemoryAccessEventType.BeforePortRead)
{
e.CancelMemoryAccess = true;
e.Value = chPorts.ReadStatus();
}
else if (e.EventType == MemoryAccessEventType.BeforePortWrite)
{
e.CancelMemoryAccess = true;
chPorts.WriteCommand(e.Value);
if (e.Value == CMD_RD_USB_DATA0 || e.Value == CMD_WR_HOST_DATA)
{
waitingMultiDataTransferLength = true;
}
}
}
else if (e.Address == 0xAA)
{
if (e.EventType == MemoryAccessEventType.AfterPortWrite)
{
var wasOn = (aaPortValue & 0x40) == 0;
var on = (e.Value & 0x40) == 0;
if (on != wasOn)
{
Debug.WriteLine("CAPS " + (on ? "ON" : "OFF"));
}
aaPortValue = e.Value;
}
else if (e.EventType == MemoryAccessEventType.AfterPortRead)
{
e.Value = aaPortValue;
}
}
}