Nios+PCI doesn't work together, help.

[Altera_Forum]

I create Nios+PCI compiler (PCI target 32-bit) system on Cyclone II. When PCI is connected, Nios doesn't load any software, but works good without PCI. I've made PCI in reset, without clk - doesn't help. 

 What I can do else? What is the problem? http://www.alteraforum.com/images/smilies/confused.gif

[Altera_Forum]

I'm also using Nios II + PCI core on Cyclone III but I instantiated the PCI separately from the SOPC just for future flexibility, and everything works well. Check in SOPC Builder to make sure your PCI core's Avalon MM Master to not connected to the CPU core at all, and that it should be connected to the proper Avalon MM Slave. (Otherwise, it wouldn't be able to generate SOPC.)

[Altera_Forum]

I reduced Nios clock frequency (from 66MHz to 33), and the system started good. So I consider this problem is due to internal routing timings problem.