PORTIBM PC Portable (uses same BIOS as XT) 0CF8-0CFF - PCI Configuration Mechanism 1 - Configuration Registers SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 0CF8h"Mechanism 2" 0CF8d -W configuration address port (see #P0944) 0CFCd RW configuration data port (when PORTIBM PC Portable (uses same BIOS as XT) 0CF8h bit 31 is set) Bitfields for PCI configuration address port: Bit(s) Description (Table P0944) 1-0 reserved (00) 7-2 configuration register number (see #00878) 10-8 function 15-11 device number 23-16 bus number 30-24 reserved (0) 31 enable configuration space mapping Note: configuration registers are considered DWORDs, so the number in bits 7-2 is the configuration space address shifted right two bits SeeAlso: #P0945