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IDE HDD Block Mode

Block mode is also called “block transfer”, “multiple commands”, or “multiple sector read/write”. If your IDE hard drive supports block mode, please select “Enabled” for automatic detection of the optimal number of block read/write per sector the drive supports.

The choices: Enabled, Disabled

Onboard Serial Port 1/ Port 2

Normally, the board’s I/O chips will occupy a certain portion of memory space. For each I/O device, the computer provides and I/O address. The more devices attached the more address needed to organize the memory storage areas. If all the I/O devices are fun running through the same address, your devices would come to a near halt. Also, the corresponding interrupt needs to be selected.

The choices: Disabled, 3F8/IRQ4, 2F8/IRQ3, 3E8/IRQ4,

2E8/IRQ3, Auto

UART 2 Mode

If you do not disable Onboard Serial Port 2, you will have to select an operating mode for the second serial port.

The choices: Standard, HPSIR, ASKIR

If you select HRSIR or ASKIT, you have to set the following tow functions.

IR Function Duplex

Select the value required by the IR device connected to the IR port. Full-duplex mode permits simultaneous two-direction transmission. Half-duplex mode permits transmission in one direction only at a time.

The choices: Full, Half

Chapter3 Award BIOS Setup

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Intel SBC-780 manual  IDE HDD Block Mode,  Onboard Serial Port 1/ Port,  Uart 2 Mode,  IR Function Duplex