Intel BX80605I7870 Data Sheet - Page 42

Register Description Device: 0 Function: 1 Offset: 40h Access as a Dword Bit Type 25:24 RW 21:20 RW 17:16 RW 13:12 RW 9:8 RW 5:4 RW Reset Value Description PAM3_LOENABLE. 0D0000h-0D3FFFh Attribute (LOENABLE). This field controls the steering of read and write cycles that address the BIOS area from 0D0000h to 0D3FFFh. 0 00 = DRAM Disabled: All accesses are directed to ESI. 01 = Read Only: All reads are sent to DRAM. All writes are forwarded to ESI. 10 = Write Only: All writes are send to DRAM. Reads are serviced by ESI. 11 = Normal DRAM Operation: All reads and writes are serviced by DRAM. PAM2_HIENABLE. 0CC000h-0CFFFFh Attribute (HIENABLE). This field controls the steering of read and write cycles that address the BIOS area from 0CC000h to 0CFFFFh. 0 00 = DRAM Disabled: All accesses are directed to ESI. 01 = Read Only: All reads are sent to DRAM. All writes are forwarded to ESI. 10 = Write Only: All writes are send to DRAM. Reads are serviced by ESI. 11 = Normal DRAM Operation: All reads and writes are serviced by DRAM. PAM2_LOENABLE. 0C8000h-0CBFFFh Attribute (LOENABLE). This field controls the steering of read and write cycles that address the BIOS area from 0C8000h to 0CBFFFh. 0 00 = DRAM Disabled: All accesses are directed to ESI. 01 = Read Only: All reads are sent to DRAM. All writes are forwarded to ESI. 10 = Write Only: All writes are send to DRAM. Reads are serviced by ESI. 11 = Normal DRAM Operation: All reads and writes are serviced by DRAM. PAM1_HIENABLE. 0C4000h-0C7FFFh Attribute (HIENABLE). This field controls the steering of read and write cycles that address the BIOS area from 0C4000h to 0C7FFFh. 0 00 = DRAM Disabled: All accesses are directed to ESI. 01 = Read Only: All reads are sent to DRAM. All writes are forwarded to ESI. 10 = Write Only: All writes are send to DRAM. Reads are serviced by ESI. 11 = Normal DRAM Operation: All reads and writes are serviced by DRAM. PAM1_LOENABLE. 0C0000h-0C3FFFh Attribute (LOENABLE). This field controls the steering of read and write cycles that address the BIOS area from 0C0000h to 0C3FFFh. 0 00 = DRAM Disabled: All accesses are directed to ESI. 01 = Read Only: All reads are sent to DRAM. All writes are forwarded to ESI. 10 = Write Only: All writes are send to DRAM. Reads are serviced by ESI. 11 = Normal DRAM Operation: All reads and writes are serviced by DRAM. PAM0_HIENABLE. 0F0000h-0FFFFFh Attribute (HIENABLE). This field controls the steering of read and write cycles that address the BIOS area from 0F0000h to 0FFFFFh. 0 00 = DRAM Disabled: All accesses are directed to ESI. 01 = Read Only: All reads are sent to DRAM. All writes are forwarded to ESI. 10 = Write Only: All writes are send to DRAM. Reads are serviced by ESI. 11 = Normal DRAM Operation: All reads and writes are serviced by DRAM. 42 Datasheet