WORD
The bit set to TRUE indicates which error has occurred in which COM port.
Bit 0: COM0 Overrun error
Bit 1: COM0 Framing error
Bit 2: COM0 Parity error
Bit 7: COM0 Overflow error
Bit 8: COM1 Overrun error
Bit 9: COM1 Framing error
Bit A: COM1 Parity error
Bit F: COM1 Overflow error