Ampro Corporation XTX 820 - Manual (Page 77)

Chapter 4 BIOS Setup Utility
XTX 820 Reference Manual 71
∗ If [Auto] is selected, the BIOS will auto detect the number of sectors per block for transfer
from the hard disk drive to the memory. The data transfer to and from the device will
occur multiple sectors at a time.
♦ PIO Mode – [Auto], [0], [1], [2], [3], or [4]
This field sets the IDE PIO (Programmable I/O) mode and programs the timing cycles
between the IDE drive and the programmable IDE controller. As the PIO mode increases, the
cycle time decreases.
∗ If [Auto] is selected, the BIOS auto detects the PIO mode.
∗ If [0] is selected, the BIOS uses PIO mode 0, with a data transfer rate of 3.3 MBs.
∗ If [1] is selected, the BIOS uses PIO mode 1, with a data transfer rate of 5.2 MBs.
∗ If [2] is selected, the BIOS uses PIO mode 2, with a data transfer rate of 8.3 MBs.
∗ If [3] is selected, the BIOS uses PIO mode 3, with a data transfer rate of 11.1 MBs.
∗ If [4] is selected, the BIOS uses PIO mode 4, with a data transfer rate of 16.6 MBs.
♦ DMA Mode – [Auto], [SWDMA0], [SWDMA01], [SWDMA2], [MWDMA0], [MWDMA1],
[MWDMA2], [UDMA0], [UDMA1], [UDMA2], [UDMA3], [UDMA4], [UDMA5], or
[UDMA6]
This field allows you to select DMA modes and adjust the respective transfer rate. The list of
available DMA modes are dependent on the IDE device and its supported modes, including
the transfer speed and cable type (40-pin or 80-pin).
∗ If [Auto] is selected, the BIOS auto detects the DMA Mode. Use this value if the IDE
disk drive support cannot be determined.
∗ If [SWDMA0] is selected, the BIOS uses Single Word DMA mode 0, with a data transfer
rate of 2.1 MBs.
∗ If [SWDMA1] is selected, the BIOS uses Single Word DMA mode 1, with a data transfer
rate of 4.2 MBs.
∗ If [SWDMA2] is selected, the BIOS uses Single Word DMA mode 2, with a data transfer
rate of 8.3 MBs.
∗ If [MWDMA0] is selected, the BIOS uses Double Word DMA mode 0, with a data
transfer rate of 4.2 MBs.
∗ If [MWDMA1] is selected, the BIOS uses Double Word DMA mode 1, with a data
transfer rate of 13.3 MBs.
∗ If [MWDMA2] is selected, the BIOS uses Double Word DMA mode 2, with a data
transfer rate of 16.6 MBs.
∗ If [UDMA0] is selected, the BIOS uses Ultra DMA mode 0, with a data transfer rate of
16.6 MBs.
∗ If [UDMA1] is selected, the BIOS uses Ultra DMA mode 1, with a data transfer rate of
25 MBs.
∗ If [UDMA2] is selected, the BIOS uses Ultra DMA mode 2, with a data transfer rate of
33.3 MBs.
NOTE If you select UDMA3, UDMA4, UDMA5, or UDMA6, an 80-conductor
ATA cable is required.
∗ If [UDMA3] is selected, the BIOS uses Ultra DMA mode 3, with a data transfer rate of
44.4 MBs. To use this mode, an 80-conductor ATA cable is required.
∗ If [UDMA4] is selected, the BIOS uses Ultra DMA mode 4, with a data transfer rate of
66.6 MBs. To use this mode, an 80-conductor ATA cable is required.