Int 1A Fn B106  - Intel PCi BIOS V2.0c - Pci Bus-specific Operations       [X]

   AX = B106h
   BL = bus number
   EDX = Special Cycle data

Return: CF clear if successful
   CF set on error
   AH = status
       00h successful
       81h unsupported function
   EAX, EBX, ECX, and EDX may be modified
   all other flags (except IF) may be modified

Note:  this function may require up to 1024 byte of stack; it will not enable
     interrupts if they were disabled before making the call

See Also: AX=B186h