INT 1A - PCI BIOS v2.0c+ - WRITE CONFIGURATION WORD (32-bit) AX = B18Ch BH = bus number BL = device/function number (bits 7-3 device, bits 2-0 function) DI = register number (multiple of 2 less than 0100h) CX = word to write Return: as for AX=B10Ch Note: the meanings of BL and BH on return were exchanged between the initial drafts of the specification and final implementation SeeAlso: AX=B10Ch,AX=B18Bh,AX=B18Dh