public override void Start()
{
if (Device.Status != DeviceStatus.Available)
{
return;
}
ControlPort.Write8(0);
for (byte drive = 0; drive < maximunDriveCount; drive++)
{
DoIdentifyDrive(drive);
}
}
/// <summary>
/// Writes the settings.
/// </summary>
/// <param name="settings">The settings.</param>
protected void WriteSettings(byte[] settings)
{
// Write MISCELLANEOUS reg
miscellaneousOutputWrite.Write8(settings[0]);
// Write SEQUENCER regs
for (byte i = 0; i < 5; i++)
{
sequencerAddress.Write8(i);
sequencerData.Write8(settings[1 + i]);
}
// Unlock CRTC registers
crtControllerIndexColor.Write8(0x03);
crtControllerDataColor.Write8((byte)(crtControllerData.Read8() | 0x80));
crtControllerIndexColor.Write8(0x11);
crtControllerDataColor.Write8((byte)(crtControllerData.Read8() & ~0x80));
// Make sure they remain unlocked
settings[0x03] = (byte)(settings[0x03] | 0x80);
settings[0x11] = (byte)(settings[0x11] & ~0x80);
// Write CRTC regs
for (byte i = 0; i < 25; i++)
{
crtControllerIndexColor.Write8(i);
crtControllerDataColor.Write8(settings[6 + i]);
}
// Write GRAPHICS CONTROLLER regs
for (byte i = 0; i < 9; i++)
{
graphicsControllerAddress.Write8(i);
graphicsControllerData.Write8(settings[31 + i]);
}
// Write ATTRIBUTE CONTROLLER regs
for (byte i = 0; i < 21; i++)
{
inputStatus1ReadB.Read8();
attributeAddress.Write8(i);
attributeAddress.Write8(settings[52 + i]);
}
// Lock 16-color palette and unblank display */
inputStatus1ReadB.Read8();
attributeAddress.Write8(0x20);
}
/// <summary>
/// Writes the specified ch.
/// </summary>
/// <param name="ch">The ch.</param>
public void Write(byte ch)
{
try
{
spinLock.Enter();
while (!CanTransmit())
{
;
}
thrBase.Write8(ch);
}
finally
{
spinLock.Exit();
}
}
private void DoIdentifyDrive(byte index)
{
//HAL.DebugWriteLine("Device " + index.ToString() + " ID...");
driveInfo[index].Present = false;
//Send the identify command to the selected drive
DeviceHeadPort.Write8((byte)((index == 0) ? 0xA0 : 0xB0));
SectorCountPort.Write8(0);
LBALowPort.Write8(0);
LBAMidPort.Write8(0);
LBAHighPort.Write8(0);
CommandPort.Write8(IDECommand.IdentifyDrive);
if (StatusPort.Read8() == 0)
{
//HAL.DebugWriteLine("Device " + index.ToString() + " doesnt exist...");
//Drive doesn't exist
return;
}
//Wait until a ready status is present
if (!WaitForReadyStatus())
{
return; //There's no ready status, this drive doesn't exist
}
if (LBAMidPort.Read8() != 0 && LBAHighPort.Read8() != 0) //Check if the drive is ATA
{
//In this case the drive is ATAPI, which is not supported
//HAL.DebugWriteLine("Device " + index.ToString() + " not ATA");
return;
}
//Wait until the identify data is present (256x16 bits)
if (!WaitForIdentifyData())
{
//HAL.DebugWriteLine("Device " + index.ToString() + " ID error");
return;
}
//Read the identification info
var info = new DataBlock(512);
for (uint ix = 0; ix < 256; ix++)
{
info.SetUShort(ix * 2, DataPort.Read16());
}
//Find the addressing mode
bool lba48Supported = ((info.GetUShort(IdentifyDrive.CommandSetSupported83) & 0x200) == 0x200);
driveInfo[index].AddressingMode = (lba48Supported ? AddressingMode.LBA48 : AddressingMode.LBA28);
//Find the max LBA count
uint lba28SectorCount = info.GetUInt(IdentifyDrive.MaxLBA28);
ulong lba48SectorCount = info.GetULong(IdentifyDrive.MaxLBA48);
//HAL.DebugWriteLine("LBA48BIT=" + lba48Supported.ToString());
//HAL.DebugWriteLine("LBA28 =" + lba28SectorCount.ToString("X2"));
if (!lba48Supported) //No LBA48
{
driveInfo[index].MaxLBA = lba28SectorCount;
}
else //LBA48 supported
{
if (lba28SectorCount == 0x0FFFFFFF) //Check the limit according to the d1699r3f-ata8-acs.pdf (4.10.4 IDENTIFY DEVICE data)
{
driveInfo[index].MaxLBA = (uint)lba48SectorCount;
}
else
{
driveInfo[index].MaxLBA = lba28SectorCount;
}
}
//An ATA drive is present and ready to use
driveInfo[index].Present = true;
//HAL.DebugWriteLine("Device " + index.ToString() + " present - MaxLBA=" + driveInfo[index].MaxLBA.ToString());
}
private void DoIdentifyDrive(byte index)
{
driveInfo[index].Present = false;
//Send the identify command to the selected drive
DeviceHeadPort.Write8((byte)((index == 0) ? 0xA0 : 0xB0));
SectorCountPort.Write8(0);
LBALowPort.Write8(0);
LBAMidPort.Write8(0);
LBAHighPort.Write8(0);
CommandPort.Write8(IDECommand.IdentifyDrive);
if (StatusPort.Read8() == 0)
{
//Drive doesn't exist
return;
}
//Wait until a ready status is present
if (!WaitForReadyStatus())
{
return; //There's no ready status, this drive doesn't exist
}
if (LBAMidPort.Read8() != 0 && LBAHighPort.Read8() != 0) //Check if the drive is ATA
{
//In this case the drive is ATAPI
//HAL.DebugWriteLine("Device " + index.ToString() + " not ATA");
return;
}
//Wait until the identify data is present (256x16 bits)
if (!WaitForIdentifyData())
{
//HAL.DebugWriteLine("Device " + index.ToString() + " ID error");
return;
}
//An ATA drive is present
driveInfo[index].Present = true;
//Read the identification info
var info = new DataBlock(512);
for (uint ix = 0; ix < 256; ix++)
{
info.SetUShort(ix * 2, DataPort.Read16());
}
//Find the addressing mode
var lba28SectorCount = info.GetUInt(IdentifyDrive.MaxLBA28);
AddressingMode aMode = AddressingMode.NotSupported;
if ((info.GetUShort(IdentifyDrive.CommandSetSupported83) & 0x200) == 0x200) //Check the LBA48 support bit
{
aMode = AddressingMode.LBA48;
driveInfo[index].MaxLBA = info.GetUInt(IdentifyDrive.MaxLBA48);
}
else if (lba28SectorCount > 0) //LBA48 not supported, check LBA28
{
aMode = AddressingMode.LBA28;
driveInfo[index].MaxLBA = lba28SectorCount;
}
driveInfo[index].AddressingMode = aMode;
//HAL.DebugWriteLine("Device " + index.ToString() + " present - MaxLBA=" + driveInfo[index].MaxLBA.ToString());
}
