PCI interfaceing Vendor ID.......

[sztibi82]

Hi all.
I checked the control panel for my network adapter, and found the followings:

Input/output range: D400-D4FF
Memory rangeFFF7F00-DFFF7FFF
Interrupt request:11

It is a realterk network adapter....

I went into a program reading the first bytes, words from the above writen I/O range, and i found different data than expected.

I mean the data is else that it sould be.

From where can i read exactly the vendor ID, and other usefull data?

 

[echo47]

The PCI Vendor ID is located in PCI Configuration Space. That is different from I/O space and memory space. Accessing PCI Configuration Space requires special PCI bus cycles.

If you are using Windows, maybe this will help you:
"Accessing PCI Device Configuration Space"
https://msdn2.microsoft.com/en-us/library/aa906253.aspx

 

[sztibi82]

Thanks for the answere

I want to design a PCI interface, so i need to know exactly where it is located, to be able to place on my design the needed data.

 

[echo47]

Here is the layout of the 64-byte PCI Configuation Space Header:
**broken link removed**

For complete info about PCI bus, see the conventional "PCI Local Bus Specification". It is not free, however you may be able to find a copy somewhere.
https://www.pcisig.com/specifications/conventional/