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+ - READ CONFIGURATION WORD AX = B109h BH = bus number BL = device/function number (bits 7-3 device, bits 2-0 function) DI = register number (0000h-00FFh, must be multiple of 2) (see #00878) Return: CF clear if successful CX = word read CF set on error AH = status (00h,87h) (see #00729) EAX, EBX, ECX, and EDX may be modified all other flags (except IF) may be modified Notes: this function may require up to 1024 byte of stack; it will not enable interrupts if they were disabled before making the call the meanings of BL and BH on entry were exchanged between the initial drafts of the specification and final implementation BUG: the Award 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. 4.51PG (dated 05/24/96) incorrectly returns FFFFh for register 00h if the PCI function number is nonzero SeeAlso: AX=B108h,AX=B10Ah,AX=B189h,INT 2F/AX=1684h/BX=304Ch