DFI 586ITBD, User Manual, Page: 66 / 89

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586ITBD System Board User’s Manual
IDE Primary Master/Slave UDMA and IDE Secondary Master/
Slave UDMA
These categories allow you to set the Ultra DMA in use. When Auto
is selected, the BIOS will select the best available option after checking
your hard drive or CD-ROM.
Auto The BIOS will automatically detect the settings for you.
Disabled The BIOS will not detect these categories.
On-Chip Primary PCI IDE and On-Chip Secondary PCI IDE
These categories allow you to enable or disable the primary and
secondary IDE controller. The default is Enabled. Select Disabled if you
want to add a different hard drive controller.
USB Keyboard Support
By default, USB Keyboard Support is Disabled. If you are operating
under DOS, make sure to enable this function.
KBC Input Clock
This is used to select the input clock of your keyboard. The options
are: 6MHz, 8MHz, 12MHz and 16MHz. The default is 8MHz.
Onboard FDC Controller
Enabled Enables the onboard floppy disk controller.
Disabled Disables the onboard floppy disk controller.
Onboard Serial Port 1 and Onboard Serial Port 2
Auto The system will automatically select an I/O address for the
onboard serial port 1 and serial port 2.
3F8/IRQ4, 2F8/IRQ3, 3E8/IRQ4, 2E8/IRQ3 Allows you to manually
select an I/O address for the onboard serial port 1 and
serial port 2.
Disabled Disables the onboard serial port 1 and/or serial port
2.
UART2 Mode Select
The system board supports IrDA function for wireless connectivity
between your computer and peripheral devices. You may not use