Tyan Computer GX21 RxD, TxD Active, Hi, Hi / Hi, Lo / Lo, Hi / Lo, Lo, IR Transmission Delay

The available modes are as follows:

•ASKIR - The ASKIR setting allows infrared serial com- munication at a maximum baud rate of 56K baud.

•HPSIR - The HPSIR setting allows infrared serial com- munication at a maximum baud rate of 115K baud.

•FIR - The FIR (Fast IR) setting allows infrared serial communication at a maximum baud rate of 4M baud.

•Normal - Sets serial port 2 to operate in normal mode. This is the default setting.

RxD, TxD Active

This BIOS feature allows you to set the infra-red reception (RxD) and transmission (TxD) polarity and is linked to the second serial port. If you disable the second serial port, this feature will not be available.

There are four options available, based on combinations of Hi and Lo. You will need to consult your IR peripheral's docu- mentation to determine the correct polarity. Choosing the wrong polarity will prevent a proper IR connection from being established with the IR peripheral. The choices are:

Hi, Hi / Hi, Lo / Lo, Hi / Lo, Lo

IR Transmission Delay

Enabling this option introduces a 4 character delay when SIR is changed from TX mode to RX mode. The choices are:

Enabled / Disabled

UR2 Duplex Mode

This setting defines whether the IR port should operate in full duplex or half duplex mode. In full duplex mode, the IR port can receive and transmit at the same time. In half duplex mode, the IR port can either receive or transmit but cannot do both at the same time. Full duplex allows for better and faster communication. The choices are:

Half / Full

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