INT 1A - PCI BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. v2.0c+ - FIND PCI CLASS CODE (32-bit)
	AX = B183h
	ECX = class code (bits 23-0)
	SI = device index (0-n)
Return: as for AX=B103h
SeeAlso: AX=B103h