Bitfields for Intel 82378/82379 ISA Address Decoder ROM Block Enable:
Bit(s)	Description	)
 7	enable 880K-896K (EC00h-EFFFh)
 6	enable 864K-880K (E800h-EBFFh)
 5	enable 848K-864K (E400h-E7FFh)
 4	enable 832K-848K (E000h-E3FFh)
 3	enable 816K-832K (DC00h-DFFFh)
 2	enabel 800K-816K (D800h-DBFFh)
 1	enable 784K-800K (D400h-D7FFh)
 0	enable 768K-784K (D000h-D3FFh)
Note:	ISA accesses within any enabled ranges are forwarded to the PCI bus
SeeAlso: #01064,#01069