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OnChip IDE Channal0/Channel1 
The integrated peripheral controller contains an IDE interface with support for two IDE 
channels.  Select Enabled to activate each channel separately.  The settings are: Enabled and 
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 settings are: Auto, Mode 0, Mode 1, Mode 
2, Mode 3, Mode 4. 
Primary/Secondary Master/Slave UDMA 
Ultra DMA/33 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/33 
and Ultra DMA/66, select Auto to enable BIOS support.  The settings are: Auto, Disabled. 

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 (most new drives do), select Enabled for 
automatic detection of the optimal number of block read/writes per sector the drive can 
support.  The settings are: Enabled, Disabled.