Intel 80312 I/O Companion Chip - ECEE

Intel ® 80312 I/O Companion ChipPeripheral Memory-Mapped RegistersTable A-2. Peripheral Memory-Mapped Register Locations (Sheet 1 of 8)Intel ® 80312I/O CompanionChipPeripheralPCI to PCI Bridge UnitRegister Description (Name)RegisterSize inBitsInternal BusAddressPCIConfigurationSpace RegisterNumberVendor ID Register 16 0000 1000H 00HDevice ID Register 16 0000 1002H 00HPrimary Command Register 16 0000 1004H 01HPrimary Status Register 16 0000 1006H 01HRevision ID Register 8 0000 1008H 02HClass Code Register 24 0000 1009H 02HCacheline Size Register 8 0000 100CH 03HPrimary Latency Timer Register 8 0000 100DH 03HHeader Type Register 8 0000 100EH 03HReservedx0000 100FHthrough0000 1017HPrimary Bus Number Register 8 0000 1018H 06HSecondary Bus Number Register 8 0000 1019H 06HSubordinate Bus Number Register 8 0000 101AH 06HSecondary Latency Timer Register 8 0000 101BH 06HI/O Base Register 8 0000 101CH 07HI/O Limit Register 8 0000 101DH 07HSecondary Status Register 16 0000 101EH 07HMemory Base Register 16 0000 1020H 08HMemory Limit Register 16 0000 1022H 08HPrefetchable Memory Base Register 16 0000 1024H 09HPrefetchable Memory Limit Register 16 0000 1026H 09HReservedx0000 1028Hthrough0000 1033HCapabilities Pointer Register 8 0000 1034H 0DHReservedx0000 1035Hthrough0000 103DHBridge Control Register 16 0000 103EH 0FHExtended Bridge Control Register 16 0000 1040H 10HSecondary IDSEL Control Register 16 0000 1042H 10HPrimary Bridge Interrupt Status Register 32 0000 1044H 11HSecondary Bridge Interrupt Status Register 32 0000 1048H 12HSecondary Arbitration Control Register 32 0000 104CH 13HPCI Interrupt Routing Select Register 32 0000 1050H 14HSecondary I/O Base Register 8 0000 1054H 15HSecondary I/O Limit Register 8 0000 1055H 15HReservedx0000 1056Hthrough0000 1057HSecondary Memory Base Register 16 0000 1058H 16HSecondary Memory Limit Register 16 0000 105AH 16HSecondary Decode Enable Register 16 0000 105CH 17HDeveloper’s Manual A-5