Themis RES-12XR3, Installation Manual

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RES-12XR3 Installation Manual - Configuration 7 Version 1.1
3-16
Themis Computer
PIO Mode
The IDE PIO (Programmable I/O) Mode programs timing cycles between the IDE
drive and the programmable IDE controller. As the PIO mode increases, the cycle
time decreases. The options are
Auto (default), 0, 1, 2, 3, and 4.
Select Auto (default) to allow the AMI BIOS to automatically detect the PIO mode.
Use this value if the IDE storage drive support cannot be determined.
Select 0—4 to allow the AMI BIOS to use PIO mode 0—4. It has a data transfer rate
of 3.3 MB/s—16.6MB/s. See
Table 3-1 below for PIO Mode Select options.
DMA Mode
Select Auto to allow the BIOS to automatically detect IDE DMA mode when the
IDE storage device support cannot be determined. The options are Auto (default),
SWDMAn, MWDMAn, and UDMAn. See
Table 3-2 below for DMA Mode Select
Options.
Table 3-1. PIO Mode Select Options
Option Selected PIO Mode Max. Transfer Rate
0 PIO Mode 0 3.3 MB/s
1 PIO Mode 1 5.2 MB/s
2 PIO Mode 2 8.3 MB/s
3 PIO Mode 3 11.1 MB/s
4 PIO Mode 4 16.6 MB/s
Table 3-2.
DMA Mode Select Options
Option Selected DMA Mode Max. Transfer Rate
SWDMA 0 Single-Word DMA 0 2.1 MB/s
SWDMA 1 Single-Word DMA 1 4.2 MB/s
SWDMA 2 Single-Word DMA 2 8.3 MB/s
MWDMA 0 Multi-Word DMA 0 4.2 MB/s
MWDMA 1 Multi-Word DMA 1 13.3 MB/s
MWDMA 2 Multi-Word DMA 2 16.6 MB/s