Intel 80312 I/O Companion Chip - ECEE

Intel ® 80312 I/O Companion ChipPCI Address Translation Unit5.7.30 Secondary Outbound I/O Window Value Register -SOIOWVRThe Secondary Outbound I/O Window Value Register (SOIOWVR) contains the secondary PCII/O address used to convert Intel ® 80312 I/O companion chip internal bus addresses. This addressis driven on the secondary PCI bus as a result of the secondary outbound ATU address translation.See Section 5.2.2.1, “Outbound Address Translation” on page 5-15 for details on outbound addresstranslation.The secondary I/O window is from Intel ® 80312 I/O companion chip internal bus address9001 0000H to 9001 FFFFH with the fixed length of 64 Kbytes.Table 5-58.Secondary Outbound I/O Window Value Register - SOIOWVRIOPAttributes31 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 Address126CHPCI Configuration Address Offset6CH - 6FHAttribute Legend:RV = ReservedPR = PreservedRS = Read/SetRW = Read/WriteRC = Read ClearRO = Read OnlyNA = Not AccessibleBit Default Description31:04 0000 000H Secondary Outbound I/O Window Value - Used to convert internal bus addresses to PCI addresses.03:00 0H ReservedDeveloper’s Manual 5-91