Int 1A Fn B186  - Pci Bios V2.0c+ - Pci Bus-specific Operations (32-bit)   [X]

   AX = B186h
   BH = bus number
   EDX = Special Cycle data

Return: as for AX=B106h

Note:  the meanings of BL and BH on return were exchanged between the initial
     drafts of the specification and final implementation

See Also: AX=B106h