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AIMB-250 Series
74 AIMB-250 Series User’s Manual
Item Options Description
On-Chip Primary PCI IDE
On-Chip Secondary PCI IDE
Enabled
Disabled
The chipset contains a PCI IDE interface with
support for two IDE channels. Select Enabled to
activate the primary/secondary IDE interface.
Select Disabled to deactivate this interface.
IDE Primary Master PIO
IDE Primary Slave PIO
IDE Secondary Master PIO
IDE Secondary Slave PIO
Auto
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
The 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.
IDE Primary Master UDMA
IDE Primary Slave UDMA
IDE Secondary Master UDMA
IDE Secondary Slave UDMA
Auto
Disabled
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 the hard drive and the system
software both support Ultra DMA, select Auto to
enable BIOS support.
3.5.4.2 Onboard Device
Item Options Description
USB Controller
Enabled
Disabled
This item allows you to set the USB Controller.
USB 2.0 Controller
Disabled
Enabled
This item allows you to set the USB 2.0
Controller.
USB Keyboard Support
Enabled
Disabled
This item allows you to set the system’s USB
keyboard to Enabled/Disabled.
USB Mouse Support
Enabled
Disabled
This item allows you to set the system’s USB
Mouse to Enabled/Disabled.
AC97 Audio
Auto
Disabled
This item allows you to decide to Auto/disable
the Codec chip to support AC97 Audio.