Hi,

the PCIe interface of our PROFIBUS board has been recognised by all PCI-BIOS versions prior
 PCI-BIOS V2 !

 Are you excluding again 80% of all PCI interfaces which have a class code of UNKNOWN ?

Here is the pci -vv output with PCI-BIOS V2:

Class          = Unknown (Unknown)
Vendor ID      = 10b5h, PLX Technology, Inc. 
Device ID      = 86e1h, Unknown Unknown
PCI index      = 0h
Class Codes    = ff0000h
Revision ID    = ach
Bus number     = 7
Device number  = 4
Function num   = 0
Status Reg     = 2b0h
Command Reg    = 17h
	I/O space access enabled
	Memory space access enabled
	Bus Master enabled
	Special Cycle operations ignored
	Memory Write and Invalidate enabled
	Palette Snooping disabled
	Parity Error Response disabled
	Data/Address stepping disabled
	SERR# driver disabled
	Fast back-to-back transactions to different agents disabled
	PCI INTx enabled
Header type    = 0h Single-function
BIST           = 0h Build-in-self-test not supported
Latency Timer  = 20h
Cache Line Size= 10h un-cacheable
BAR - 0 [Mem]  = f0280000h 32bit length 512 enabled
BAR - 1 [I/O]  = 2000h length 256 enabled
BAR - 2 [Mem]  = f0200000h 32bit length 524288 enabled
Subsystem Vendor ID = 14a0h
Subsystem ID        = 2bh
Max Lat        = 0ns
Min Gnt        = 0ns
PCI Int Pin    = INT A
Interrupt line = 5
CPU Interrupt  = 5h
Capabilities Pointer = 40h
Capability ID        = 1h - Power Management
Capabilities         = 0h - 0h 
Capability ID        = 6h - CompactPCI Hot Swap
Capabilities         = 0h - 3h 
Capability ID        = 3h - VPD
Capabilities         = 0h - 0h 
Device Dependent Registers:
0x040:  0148 0000 0000 0000   064c 0000 0300 0000 
0x050:  0000 0000 0000 0000   0000 0000 0000 0000 
...
0x0f0:  0000 0000 0000 0000   0000 0000 0000 0000 

--Armin