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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 4.51PG (dated 05/24/96) incorrectly returns FFFFh for register 00h if the PCI function number is nonzero
See Also:
AX=B108h - AX=B10Ah - AX=B189h - INT 2F/AX=1684
Category:
Expansion Bus Bios
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Int 1Ah
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P
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