///\r
/// Inconsistent with specification here: \r
/// In PI1.0 spec, PEI_SERVICES_SIGNATURE is defined as 0x5652455320494550. But \r
///\r
/// Inconsistent with specification here: \r
/// In PI1.0 spec, PEI_SERVICES_SIGNATURE is defined as 0x5652455320494550. But \r