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