//0x38 bytes (sizeof)
struct _HEADLESS_LOADER_BLOCK
{
UCHAR UsedBiosSettings; //0x0
UCHAR DataBits; //0x1
UCHAR StopBits; //0x2
UCHAR Parity; //0x3
ULONG BaudRate; //0x4
ULONG PortNumber; //0x8
UCHAR* PortAddress; //0xc
USHORT PciDeviceId; //0x10
USHORT PciVendorId; //0x12
UCHAR PciBusNumber; //0x14
USHORT PciBusSegment; //0x16
UCHAR PciSlotNumber; //0x18
UCHAR PciFunctionNumber; //0x19
ULONG PciFlags; //0x1c
struct _GUID SystemGUID; //0x20
UCHAR IsMMIODevice; //0x30
UCHAR TerminalType; //0x31
UCHAR InterfaceType; //0x32
UCHAR RegisterBitWidth; //0x33
UCHAR RegisterAccessSize; //0x34
};