Source:  AIOCOMX

Explanation:  AIOCOMX detected a 16550 UART device in the port hardware, disabled the 16550 FIFO mode, and set the maximum port speed to X. The NOFIFO parameter on the LOAD AIOCOMX command line disabled the FIFO mode, and the MAXRATE=parameter set the maximum port speed to X. If the MAXRATE= parameter is not used, the default maximum port speed is2,400 bps.

Action:  If the port settings are acceptable, no action is required. If you want to change port operation, you must unload and reload AIOCOMX.

You can view the command line load parameters by entering the LOAD AIOCOMX ?command.