Intel 80312 I/O Companion Chip - ECEE

Intel ® 80312 I/O Companion ChipPCI Address Translation Unit5.7.26 Primary Outbound I/O Window Value Register - POIOWVRThe Primary Outbound I/O Window Value Register (POIOWVR) contains the primary PCI I/Oaddress used to convert the internal bus access to a PCI address. This address is driven on theprimary PCI bus as a result of the primary outbound ATU address translation. See Section 5.2.2.1,“Outbound Address Translation” on page 5-15 for details on outbound address translation.The primary I/O window is from Intel ® 80312 I/O companion chip internal bus address 9000 000Hto 9000 FFFFH with the fixed length of 64 Kbytes.Table 5-54.Primary Outbound I/O Window Value Register - POIOWVRIOPAttributes31 28 24 20 16 12 8 4 0rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rv rv rv rvPCIAttributesrwrw rw rw rw rw rw rwrw rw rw rw rw rw rw rwrw rw rw rw rw rw rw rw rw rw rwrwrvrvrvrvIntel ® 80200 Processor Local Bus Address125CHPCI Configuration Address Offset5CH - 5FHAttribute Legend:RV = ReservedPR = PreservedRS = Read/SetRW = Read/WriteRC = Read ClearRO = Read OnlyNA = Not AccessibleBit Default Description31:04 0000 000H Primary Outbound I/O Window Value - Used to convert internal bus addresses to PCI addresses.03:00 0H ReservedDeveloper’s Manual 5-87