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SubjectRe: Ideas for abstracting driver IO from bus implementation?
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> > The OS does it.
>
> I take it that this is not true of buses that the CPU can't see, and that the
> I2O controller looks after those.

Yes

> > The CPU->I2O controller interface is defined right now for PCI. The I2O
> > controller can itself control anything the hardware allows it to on the
> > busses. Indeed I2O would work over ISA 8) it would just suck a lot that way.
>
> I'm not sure, but I think you may have misunderstood what I meant... Can the
> I2O controller configure and control ISA devices, such as a PnP SCSI card.

In theory. I'm not aware of any I2O devices controlling anything but PCI
and hotswap PCI


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