OSDev.org

Posted: **Fri Jun 23, 2023 8:19 am**

This page is too brief and I can't learn from it.
I even don't know how to get the Bus Master Register.
Is there anyone help me?

Posted: **Fri Jun 23, 2023 10:06 am**

The "address" of the Bus Master Register is stored in BAR4, in the PCI Configuration Space of the disk controller.

Ensure that you understand PCI devices and how to read the configuration space before trying to program a PCI device.

Posted: **Sat Jun 24, 2023 8:54 am**

iansjack wrote:
The "address" of the Bus Master Register is stored in BAR4, in the PCI Configuration Space of the disk controller.
Ensure that you understand PCI devices and how to read the configuration space before trying to program a PCI device.

Thanks.I've found the relative pages, and my DMA works properly now!

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