Intel 80312 I/O Companion Chip - ECEE

Intel ® 80312 I/O Companion ChipPCI Address Translation Unit5.7.42 Secondary Outbound DAC Window Value Register -SODWVRThe Secondary Outbound DAC Window Value Register (SODWVR) contains the secondary PCIDAC address used to convert an Intel ® 80312 I/O companion chip internal bus address. Thisaddress is driven on the secondary PCI bus as a result of the secondary outbound ATU addresstranslation. See Section 5.2.2.1, “Outbound Address Translation” on page 5-15 for details onoutbound address translation. This register is used in conjunction with the Secondary OutboundUpper 64-Bit DAC Register.The secondary DAC window is from Intel ® 80312 I/O companion chip internal bus address8C00 000H to 8FFF FFFFH with the fixed length of 64 Mbytes.Table 5-70.Secondary Outbound DAC Window Value Register - SODWVRIOPAttributes31 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 ro roPCIAttributesrw rw rw rw rw rw rw rwrw rw rw rw rw rw rw rwrw rw rw rw rw rw rw rw rw rw rw rwrvrvroroIntel ® 80200 Processor Local Bus Address129CHPCI Configuration Address Offset9CH - 9FHAttribute Legend:RV = ReservedPR = PreservedRS = Read/SetRW = Read/WriteRC = Read ClearRO = Read OnlyNA = Not AccessibleBit Default Description31:04 0000 000H Secondary Outbound DAC Window Value - The secondary ATU uses this value to convert Intel® 80312I/O companion chip internal bus addresses to PCI addresses.03:02 00 2 ReservedBurst Order - This bit field shows the address sequence during a memory burst. Only linear01:00 00 2 incrementing mode is supported.5-106 Developer’s Manual