> Hmm. My knowledge may be a bit dated in this matter, but as I recall the
> 8237 DMA controller standard on PCs only supports DMA requests up to 128k (and
> then only on the upper 4 DMA channels). The low 4 DMA channels were
> byte-granular and could only transfer 64k. Am I correct in assuming from this
> discussion that the state of affairs is somewhat different nowadays?
Uh, yeah. Standard PCI h/w usually has 32 bit dma engines, and a lot have 64
bit.
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