AXIOMTEK AX12270 User Manual page 48

AX12270 PC/104 Module Series User's Manual
IDE DMA transfer access
Automatic data transfer between system memory and IDE
device with minimum CPU intervention. This improves data
throughput and frees CPU to perform other tasks.
OnChip IDE Channel0/1
The board supports two channel of ordinary IDE interface.
Select "Enabled" to activate each channel separately.
IDE Prefetch Mode
Selecting "Enabled" reduces latency between each drive
read/write cycle, but may cause instability in IDE
subsystems that cannot support such fast performance. If
you are getting disk drive errors, try setting this value to
Disabled. This field does not appear when the Internal
PCI/IDE field, above, is Disabled.
IDE 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 to 4 provide
successively increased performance. In Auto mode, the
system automatically determines the best mode for each
device.
IDE Master/Slave UDMA
Select the mode of operation for the IDE drive. Ultra DMA-
33/66/100/133 implementation is possible only if your IDE
hard drive supports it and the operating environment
includes a DMA driver. If your hard drive and your system
software both support Ultra DMA-33/66/100/133, select Auto
to enable UDMA mode by BIOS.
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.
Press <Esc> to return to the Integrated Peripherals page.
42 Award BIOS Utility