/// <summary>
/// Identifies a PS/2 device.
/// </summary>
/// <param name="aPort">The port of the PS/2 device to identify.</param>
/// <param name="aDevice">An instance of the identified device.</param>
private void IdentifyDevice(byte aPort, out Device aDevice)
{
aDevice = null;
if (aPort == 1 || aPort == 2)
{
var xSecondPort = aPort == 2;
WaitToWrite();
SendDeviceCommand(DeviceCommand.DisableScanning, xSecondPort);
WaitToWrite();
SendDeviceCommand(DeviceCommand.IdentifyDevice, xSecondPort);
byte xFirstByte = 0;
byte xSecondByte = 0;
if (ReadByteAfterAckWithTimeout(ref xFirstByte))
{
/*
* |--------|---------------------------|
* | Byte | Device Type |
* |--------|---------------------------|
* | 0x00 | Standard PS/2 mouse |
* |--------|---------------------------|
* | 0x03 | Mouse with scroll wheel |
* |--------|---------------------------|
* | 0x04 | 5-button mouse |
* |--------|---------------------------|
* | 0x50 | Laptop Touchpad |
* |--------|---------------------------|
*/
if (xFirstByte == 0x00 || xFirstByte == 0x03 || xFirstByte == 0x04 || xFirstByte == 0x50)
{
var xDevice = new PS2Mouse(aPort, xFirstByte);
xDevice.Initialize();
aDevice = xDevice;
}
/*
* |-----------------|----------------------------------------------------------------|
* | Bytes | Device Type |
* |-----------------|----------------------------------------------------------------|
* | 0xAB, 0x41 | MF2 keyboard with translation enabled in the PS/2 Controller |
* | or 0xAB, 0xC1 | (not possible for the second PS/2 port) |
* |-----------------|----------------------------------------------------------------|
* | 0xAB, 0x83 | MF2 keyboard |
* |-----------------|----------------------------------------------------------------|
*/
else if (xFirstByte == 0xAB && ReadDataWithTimeout(ref xSecondByte))
{
// TODO: replace xTest with (xSecondByte == 0x41 || xSecondByte == 0xC1)
// when the stack corruption detection works better for complex conditions
var xTest = (xSecondByte == 0x41 || xSecondByte == 0xC1);
if (xTest && aPort == 1)
{
var xDevice = new PS2Keyboard(aPort);
xDevice.Initialize();
aDevice = xDevice;
}
else if (xSecondByte == 0x83)
{
var xDevice = new PS2Keyboard(aPort);
xDevice.Initialize();
aDevice = xDevice;
}
}
}
/*
* |--------|---------------------------------------------------------------------|
* | Byte | Device Type |
* |--------|---------------------------------------------------------------------|
* | None | Ancient AT keyboard with translation enabled in the PS/Controller |
* | | (not possible for the second PS/2 port) |
* |--------|---------------------------------------------------------------------|
*/
else if (aPort == 1)
{
var xDevice = new PS2Keyboard(aPort);
xDevice.Initialize();
aDevice = xDevice;
}
if (aDevice == null)
{
mDebugger.SendInternal("(PS/2 Controller) Device detection failed:");
mDebugger.SendInternal("First Byte: " + xFirstByte);
mDebugger.SendInternal("Second Byte: " + xSecondByte);
Console.WriteLine("(PS/2 Controller) Device detection failed.");
Console.WriteLine("This is usually Fine for USB to PS / 2 Emulation");
Console.WriteLine("Press any key to Resume (Good Luck)");
Console.ReadLine();
}
}
else
{
throw new Exception("(PS/2 Controller) Port " + aPort + " doesn't exist");
}
}
/// <summary>
/// Identifies a PS/2 device.
/// </summary>
/// <param name="aPort">The port of the PS/2 device to identify.</param>
/// <param name="aDevice">An instance of the identified device.</param>
private Device IdentifyDevice(byte aPort)
{
if (aPort == 1 || aPort == 2)
{
var xSecondPort = aPort == 2;
if (!SendDeviceCommand(DeviceCommand.DisableScanning, xSecondPort))
{
return(null);
}
if (!SendDeviceCommand(DeviceCommand.IdentifyDevice, xSecondPort))
{
return(null);
}
byte xFirstByte = 0;
byte xSecondByte = 0;
if (ReadByteAfterAckWithTimeout(ref xFirstByte))
{
/*
* |--------|---------------------------|
* | Byte | Device Type |
* |--------|---------------------------|
* | 0x00 | Standard PS/2 mouse |
* |--------|---------------------------|
* | 0x03 | Mouse with scroll wheel |
* |--------|---------------------------|
* | 0x04 | 5-button mouse |
* |--------|---------------------------|
*/
if (xFirstByte == 0x00 || xFirstByte == 0x03 || xFirstByte == 0x04)
{
var xDevice = new PS2Mouse(this, aPort, xFirstByte);
xDevice.Initialize();
return(xDevice);
}
/*
* |-----------------|----------------------------------------------------------------|
* | Bytes | Device Type |
* |-----------------|----------------------------------------------------------------|
* | 0xAB, 0x41 | MF2 keyboard with translation enabled in the PS/2 Controller |
* | or 0xAB, 0xC1 | (not possible for the second PS/2 port) |
* |-----------------|----------------------------------------------------------------|
* | 0xAB, 0x83 | MF2 keyboard |
* |-----------------|----------------------------------------------------------------|
*/
else if (xFirstByte == 0xAB && ReadDataWithTimeout(ref xSecondByte))
{
// TODO: replace xTest with (xSecondByte == 0x41 || xSecondByte == 0xC1)
// when the stack corruption detection works better for complex conditions.
//
// https://github.com/CosmosOS/IL2CPU/issues/8
//
var xTest = (xSecondByte == 0x41 || xSecondByte == 0xC1);
if (xTest && aPort == 1)
{
var xDevice = new PS2Keyboard(this, aPort);
xDevice.Initialize();
return(xDevice);
}
else if (xSecondByte == 0x83)
{
var xDevice = new PS2Keyboard(this, aPort);
xDevice.Initialize();
return(xDevice);
}
}
}
/*
* |--------|---------------------------------------------------------------------|
* | Byte | Device Type |
* |--------|---------------------------------------------------------------------|
* | None | Ancient AT keyboard with translation enabled in the PS/Controller |
* | | (not possible for the second PS/2 port) |
* |--------|---------------------------------------------------------------------|
*/
else if (aPort == 1)
{
var xDevice = new PS2Keyboard(this, aPort);
xDevice.Initialize();
return(xDevice);
}
mDebugger.SendInternal("(PS/2 Controller) Device detection failed:");
mDebugger.SendInternal("First Byte: " + xFirstByte);
mDebugger.SendInternal("Second Byte: " + xSecondByte);
return(null);
}
else
{
throw new Exception("(PS/2 Controller) Port " + aPort + " doesn't exist");
}
}