All bits zero indicates normal. bit 1 (lsb) indicates receive phasor underflow bit 2 indicates receive phasor overflow bit 3 indicates receive phasor empty bit 4 indicates receive phasor full bit 5 indicates receive phasor fifo error bit 6 indicates KGROS status bit 7 indicates KGLOS status bit 8 indicates receive phasor not applicable bit 9 indicates transmit phasor underflow bit 10 indicates transmit phasor overflow bit 11 indicates transmit phasor empty bit 12 indicates transmit phasor full bit 13 indicates transmit phasor fifo error bit 14 indicates KG status is not applicable bit 15 is reserved bit 16 indicates transmit phasor not applicable If port does not have a phasor, the return value will be x8080. Bits 6 and 7 are applicable only to SDM module and reflect the KG-resync lines status as follows: bit 6|bit 7 0 | 0 KG-status O.K. disabled / disabled 1 | 0 KG-status ERR enabled / disabled 0 | 1 KG-status ERR disabled / enabled 1 | 1 KG-status ERR enabled / enabled .