Hi guys,

I've been tinkering with my code on how to access my PCI card memory mapped BAR.

I've checked the config using port cf8h-cfch register, it shows BAR0=F4000000h.

My device is a fpga board. I coded the board by myself. It works when i use the diagnostic software provided with the card, i can read/write to the memory address f4000000h using it.

What it does is just acts like RAM, just store data in the memory address. I just dont know how to access it.

Can anyone help me? I want to access it using simple means, similar to how you read/write to the pci config register, and not by learning microsoft DDK.

Thanks.

I maybe wrong, but i think it simular to read/write to pci reg, this code may help, http://www.programmersheaven.com/download/23237/download.aspx
Note: you may not be able to do much from with in XP, win98 sould be OK.

Im using WinxP.......

WinIO, giveIO, all those only open IO ports, but not the memory mapped io ports.

Is there any solution?

Code a driver - that really IS the best way to do stuff. Alternatively a mix of accessing the windows equivalent of /dev/mem mixed with user-mode I/O access... but that's pretty dirty IMHO.

Or boot to a more hardware hacker friendly OS .