Acrosser AR-B1894 - Manual (Page 35)

4.2.4.3.3 On-Chip Primary/Secondary PCI IDE
The chipset contains a PCI IDE interface with support for two IDE channels.
Select Enabled to activate the primary IDE interface. Select Disabled to
deactivate this interface.
4.2.4.3.4 IDE Primary/Secondary Master/Slave PIO
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.
4.2.4.3.5 IDE 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 the hard drive and the system software both
support Ultra DMA, select Auto to enable BIOS support.
4.2.4.3.6 On-Chip Serial ATA
The chipset contains a SATA IDE interface with support for two IDE channels.
Select Enabled to activate the primary IDE interface (Channel0). Select Disabled
to deactivate this interface.
4.2.4.3.7 PATA IDE Mode
This function allows to select PATA IDE mode.