A handful of DMA topics
Posted Jun 25, 2004 14:38 UTC (Fri) by
cthulhu (guest, #4776)
In reply to:
A handful of DMA topics by mmarkov
Parent article:
A handful of DMA topics
Check out Ian's email - the chip memory is in the CPU I/O address space.
If it accessible in the PCI or AGP space, it would show up in the CPU
memory space.
What I'm wondering now is how such chips have been used by drivers in the
past. My guess is that there were alternatives to using the I/O space,
or they didn't use DMA. In this case, the chip *must* DMA from its own
internal memory, and hence forced this enhancement.
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