On Sat, Jun 02, 2001 at 06:31:20PM +0100, Tim Waugh wrote:
> On Sat, Jun 02, 2001 at 06:03:33PM +0100, Jesús Torres wrote:
>
> > - I read that there isn't DMA support on PCI. It has bus master support
>
> That's true for the Linux driver, as a side effect of not using PCI
> interrupts yet. It just needs a small tweak and some testing to get
> it going though, so long as the PCI card has ECP support (and it's
> also supported by the Linux driver).
>
> But why switch away from a DMA ECP-capable onboard port anyway?
I have a throughtput of 500 KB/s with a onboard port. The motive is
a access time of 2uS to the port.
I think that using a PCI card I will solve my speed problems with a
better access time.
Is it true?
If I understand you the Linux driver need a small tweak and some testing
to get it using PCI interrupts. I will can to use PIO access mode with
it.
The main problem of it, is the CPU overload but there isn't DMA
suppport.
Is The DMA support a restriction of the Linux driver or of the PCI bus?
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