NEX 6620A User's Guide
Rev. B0 0301
BIOS Setup
4-18
IDE Prefetch Mode
The onboard IDE drive interfaces supports prefetching, for faster drive accesses. Set to Disabled if
your primary and/or econdary add-in IDE interface does not support prefetching.
The Choice: Enabled, Disabled.
Primary/Secondary Master/Slave PIO
The four IDE PIO (Programmed Input/Output) fields let you set a PIO mode (0-4) for each of the four
IDE devices that the onboard IDE interface supports. Modes 0 through 4 provide successively increased
performance. In Auto mode, the system automatically determines the best mode for each device.
The Choice: Auto, Mode 0, Mode 1, Mode 2, Mode 3 and Mode 4.
Primary/Secondary Master/Slave UDMA
Ultra DMA implementation is possible only if your IDE hard drive supports it and the operating
environment includes a DMA driver (Windows 95 OSR2 or a third-party IDE bus master driver). If your
hard drive and your system software both support Ultra DMA, select Auto to enable BIOS support.
The Choice: Auto, Disabled.
►
IO Device
Press <Enter> to enter the sub-menu, and you will see a sub-menu.
POWER ON Function
This item allows you the select power on event.
The Choice: Any Key, Button Only, Keyboard 98.
Onboard FDC Controller
Select Enabled if your system has a floppy disk controller (FDC) installed on the system board and you
wish to use it. If you install and-in FDC or the system has no floppy drive, select Disabled in this field.
The Choice: Enabled, Disabled.
Onboard Serial Port 1/Port 2
Select an address and corresponding interrupt for the first and second serial ports.
The Choice: 3F8/IRQ4, 2F8/IRQ3, 3E8/IRQ4, 2E8/IRQ3, Disabled, Auto.
UART Mode Select
This item allows you to select second serial port mode.
The Choice: Normal, IrDA, ASKIR.
UR2 Duplex Mode
This item allows you to select the IR half/full duplex function.
