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Chapter 3
3-4 Integrated Peripherals
This section provides information on setting peripheral devices. By choosing the
Integrated Peripherals option from the CMOS Setup Utility menu (Figure 3-1), the screen
below is displayed. This sample screen contains the manufacturer's default values for the
motherboard.
VIA OnChip IDE Device:
Press [Enter] to enter the sub-menu, which contains the following items for advanced
control:
1. OnChip IDE Channel 0/1
You can set this to disable the OnChip IDE controller if you are going to add a higher
performance IDE board.
2. IDE Prefetch Mode
Enabling this function will enhance the system efficiency.
3. Primary/Secondary Master/Slave PIO
The four IDE PIO (programmed Input/Output) fields let you set a PIO mode (0-4) for
each IDE device that the internal PCI IDE interface supports. Modes 0 through 4 provide
successively increased performance. In Auto mode, the system automatically determines
the best mode for each device.
4. Primary/Secondary Master/Slave UDMA
Ultra DMA implementation is possible only if your IDE device supports it and your
operating environment contains a DMA driver. If both your hard drive and software
support Ultra DMA, select [Auto] to enable BIOS support.
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Figure 3-5
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