Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results


Before Posting...

Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging

The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.

Check out The OSR Learning Library at:

Re: Can read PCI config space, but not normal space o-n one motherboard?

OSR_Community_UserOSR_Community_User Member Posts: 110,217
> Are you sure that the physical memory is assigned to the same
> region. Is
> that runtime space pointed by BAR0 or BAR1?

No, it isn't the same address. That's why I read the Base Address Register
first. Is there any other way of doing it? I thought that step was
required for PCI devices.

> Alternatively, is it also available in I/O space?


Another piece of data, though: It turns out that it works fine on the "bad"
motherboard if I ENABLE Plug-and-Play in the BIOS (which we disable by
default). Since the only PNP devices in the system are some "legacy" ISA
devices that have only fixed I/O at location 0x100, I don't see how that
causes any issue. But that's clearly the path I have to go down now...
Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. Sign in or register to get started.

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Kernel Debugging 13-17 May 2024 Live, Online
Developing Minifilters 1-5 Apr 2024 Live, Online
Internals & Software Drivers 11-15 Mar 2024 Live, Online
Writing WDF Drivers 20-24 May 2024 Live, Online