231466.pdf
8237A High Performance Programmable DMA Controller
Description of the 8237A chip and its functions.
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howdma.htm
How does the DMA work (by: pcguts)
Quick document describing the DMA chips and what they can do.
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howto.htm
How to program the DMA (tutorial by: breakpoint)
Introduction on using the DMA chips, description of it's registers, and sample code
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