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dma and bus mastering
i have a xpst850r with 384ram dell dimension desktop with 512 cache. i recently found that my uncached speed was about 1/2 of what it should have been. it was suggested to turn ON the bus mastering by checking the dma box for the hard drive. after retesting my system it showed the uncached speed increased 100% but the system seems to be glitching more than it should. why did enabling the dma for the hard drive do this? any experts out there?
ROBERTJL
19 Posts
139
0
Posted September 23rd, 2000 16:00
n. Memory access that does not involve the microprocessor and is frequently used for data transfer directly between memory and an "intelligent" peripheral device, such as a disk drive. Acronym: DMA. [http://support.microsoft.com/support/glossary/] by using dma one reduces the workload on the cpu to operate a device because fewer cpu cycles are required. when i enabled dma for my cd-rom there was a dramatic difference in speed when windows accessed the drive.