Samsung SN-S082D Service Manual page 21

5-4. Compatibility Issues and Suggested Actions
What is DMA Mode?
DAM (Direct Memory Access) allows autonomous transfer of data
between the main memory and peripheral devices without CPU
intervention which reduces the CPU load for multi-tasking,
and increases the transfer speed.
- It minimizes the number of interrupts for inputs and outputs during
program execution increasing system efficiency.
It provides direct exchange of I/O data at high speed between the main
memory and peripheral devices without going through the CPU.
- In DMA mode, data are transferred directly among peripheral devices without
the intervention of CPU. However, DMA mode cannot be selected if the
mainboard does not support the DMA mode. In addition, DMA mode cannot
be selected if an external connection device is used.
- In DMA mode, a number of mainboard using VIA chipsets and some specialized
mainboard may have compatibility issues. Check for DMA mode support on your
mainboard before using the mode. If the mainboard does not support the
DMA mode, then change the mode to PIO mode.
DMA Selection
Windows98 & WinME
Select DMA by clicking
-> CD/ROM -> Drive Property -> Select
Windows2000 & Windows XP
Select DMA by clicking
Hardware Wizard -> IDE ATA / ATAPI Controller -> Secondary IDE Cable Controller
Property -> Advanced
The DMA selection procedure may vary depending upon the OS environment.
Verify that the DMA selection has been performed correctly after the selection
process.
Start -> Settings -> Control Panel -> System -> Hardware Wizard
Start -> Settings -> Control Panel -> System -> Hardware ->
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