Bitfields for Intel 82378/82379 MEMCS# Control Register:
Bit(s)	Description	)
 7-5	reserved (0)
 4	MEMCS# Master Enable
 3	write enable for 0F0000h-0FFFFFh
 2	read enable for 0F0000h-0FFFFFh
 1	write enable for 080000h-09FFFFh
 0	read enable for 080000h-09FFFFh
SeeAlso: #01064