How to use system DMA?

I want to use system DMA controller on the motherboard.
I know that I have to turn to WDM, but I havn't found any useful information.
Can you guys give me some examples or articles about that?
Thanks!!!
--
shingo for windows driving & winCE driving

ps:
I want to use system DMA to transfer data from a device attatched on PCIe
bus to system Memory.
or Can I write a system DMA example for transfering data from one place to
another in the DDR memory?
--
shingo for windows driving & winCE driving


"shingo" wrote:

> I want to use system DMA controller on the motherboard.
> I know that I have to turn to WDM, but I havn't found any useful information.
> Can you guys give me some examples or articles about that?
> Thanks!!!
> --
> shingo for windows driving & winCE driving

>I want to use system DMA controller on the motherboard.

This works for ISA devices only. Since ISA is dead, this works only for a) floppy b) LPT port c) some ancient Sound Blaster cards.

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com

> I want to use system DMA to transfer data from a device attatched on PCIe
> bus to system Memory.

Impossible, system DMA does not work for PCI.

For PCI, the device must be a DMA busmaster.

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com