Int 1A/AX=B18Bh

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PCI BIOS v2.0c+ - WRITE CONFIGURATION BYTE (32-bit)

AX = B18Bh
BH = bus number
BL = device/function number (bits 7-3 device, bits 2-0 function)
DI = register number (0000h-00FFh)
CL = byte to write

Return:
As for AX=B10Bh

Note: The meanings of BL and BH on return were exchanged between the initial drafts of the specification and final implementation

See Also: AX=B10Bh - AX=B18Ch - AX=B18Dh

Category: Expansion Bus Bios - Int 1Ah - P

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