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[Forum] AmigaOne's *software* DMAANN.lu
Posted on 05-Jul-2004 01:07 GMT by atmel24 comments
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I would like to know why the AmigaOne has a software-based DMA instead of having a northbridge that has hardware DMA built-in?
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Comment 1Anonymous04-Jul-2004 23:15 GMT
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Comment 22Peter Gordon06-Jul-2004 06:23 GMT
AmigaOne's *software* DMA : Comment 23 of 24ANN.lu
Posted by Don Cox on 06-Jul-2004 07:27 GMT
In reply to Comment 22 (Peter Gordon):
"This technique could be used to make the ARM some kind of pseudo DMA controller if it wasn't the main processor in the system, IE the main processor tells the "DMA" ARM to start copying a file, and sets up a timer to interrupt it regularily from whatever other tasks it has to copy data around."

In other words, use an ARM as a bridge chip. One would expect chips specifically designed as Northbridge or Southbridge chips to work better.
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#24 Peter Gordon
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Comment 24Peter Gordon06-Jul-2004 09:54 GMT
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