DMA head scratching me no understand it ???

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Chunter

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Joined
Jul 21, 2001
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78
Ok the problem i had was that my cd rom wasn't installing anything at all,so i switched over to my cd writer and everything would install as normal.
the problem "message" i was receiving was the blue screen of death but without any words,just a few zeroes randomly placed on the screen.
So i replaced the cd rom with a new one thinking that the old one was kaput,but i was still receiving the same bsod,so i scratched my head for a while, checked the cables as you do,spoke to my mate on the phone who was at first stumped for an answer..but then he phoned back and suggested unchecking DMA.
Now i was at first a bit sceptical as i've had DMA checked on this computer since day 1 but i unchecked and my problem disappeared..great now i've got two cd roms...
the only thing that is new to my system is a pci 512 sound card from creative..

ok my question is ... why did DMA work ok one day but not the next(could my soundcard be the culprit?) and what the hell does DMA actually do for you ? is it better with or without ?

Chunter
 

~Candy~

Retired Administrator
Joined
Jan 27, 2001
Messages
103,706
Ok, here's the scoop on your middle question:

DMA (Direct Memory Access) allows devices in your computer to transfer data directly to and from RAM without having to use the CPU as an intermediary. This system is a boost to overall system performance not only because the devices can respond more quickly but it also frees up the CPU to perform other tasks.

By default, DMA is disabled for CDROM type devices.
 
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