/// <summary>
/// Performs the LBA28.
/// </summary>
/// <param name="operation">The operation.</param>
/// <param name="drive">The drive NBR.</param>
/// <param name="lba">The lba.</param>
/// <param name="data">The data.</param>
/// <param name="offset">The offset.</param>
/// <returns></returns>
protected bool PerformLBA28(SectorOperation operation, uint drive, uint lba, byte[] data, uint offset)
{
if (drive >= MaximumDriveCount || !driveInfo[drive].Present)
{
return(false);
}
DeviceHeadPort.Write8((byte)(0xE0 | (drive << 4) | ((lba >> 24) & 0x0F)));
FeaturePort.Write8(0);
SectorCountPort.Write8(1);
LBAHighPort.Write8((byte)((lba >> 16) & 0xFF));
LBAMidPort.Write8((byte)((lba >> 8) & 0xFF));
LBALowPort.Write8((byte)(lba & 0xFF));
CommandPort.Write8((operation == SectorOperation.Write) ? IDECommand.WriteSectorsWithRetry : IDECommand.ReadSectorsWithRetry);
if (!WaitForReadyStatus())
{
return(false);
}
var sector = new DataBlock(data);
//TODO: Don't use PIO
if (operation == SectorOperation.Read)
{
for (uint index = 0; index < 256; index++)
{
sector.SetUShort(offset + (index * 2), DataPort.Read16());
}
}
else
{
//NOTE: Transferring 16bits at a time seems to fail(?) to write each second 16bits - transferring 32bits seems to fix this (???)
for (uint index = 0; index < 128; index++)
{
DataPort.Write32(sector.GetUInt(offset + (index * 4)));
}
//Cache flush
DoCacheFlush();
}
return(true);
}
/// <summary>
/// Probes for this device.
/// </summary>
/// <returns></returns>
public override void Probe()
{
configAddress.Write32(BaseValue);
var found = configAddress.Read32() == BaseValue;
Device.Status = (found) ? DeviceStatus.Available : DeviceStatus.NotFound;
}
/// <summary>
/// Writes to configuration space
/// </summary>
/// <param name="bus">The bus.</param>
/// <param name="slot">The slot.</param>
/// <param name="function">The function.</param>
/// <param name="register">The register.</param>
/// <param name="value">The value.</param>
void IPCIController.WriteConfig32(byte bus, byte slot, byte function, byte register, uint value)
{
configAddress.Write32(GetIndex(bus, slot, function, register));
configData.Write32(value);
}
/// <summary>
/// Sends the command.
/// </summary>
/// <param name="command">The command.</param>
/// <param name="value">The value.</param>
protected void SendCommand(uint command, uint value)
{
indexPort.Write32(command);
valuePort.Write32(value);
}
/// <summary>Sends the command.</summary>
/// <param name="command">The command.</param>
/// <param name="value">The value.</param>
protected void SVGASetRegister(uint command, uint value)
{
indexPort.Write32(command);
valuePort.Write32(value);
}