INT 1A - PCI BIOS v2.0c+ - PCI BUS-SPECIFIC OPERATIONS (32-bit)

	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
SeeAlso: AX=B106h