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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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82G33 bảng dữ liệu(PDF) 57 Page - Intel Corporation |
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82G33 bảng dữ liệu(HTML) 57 Page - Intel Corporation |
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57 / 437 page  System Address Map Datasheet 57 3.1.3 Expansion Area (C_0000h – D_FFFFh) This 128 KB ISA Expansion region (000C_0000h – 000D_FFFFh) is divided into eight 16 KB segments. Each segment can be assigned one of four Read/Write states: read- only, write-only, read/write, or disabled. Typically, these blocks are mapped through (G)MCH and are subtractive decoded to ISA space. Memory that is disabled is not remapped. Non-snooped accesses from PCI Express or DMI to this region are always sent to DRAM. Table 3-1. Expansion Area Memory Segments Memory Segments Attributes Comments 0C0000h – 0C3FFFh WE RE Add-on BIOS 0C4000h – 0C7FFFh WE RE Add-on BIOS 0C8000h – 0CBFFFh WE RE Add-on BIOS 0CC000h – 0CFFFFh WE RE Add-on BIOS 0D0000hH – 0D3FFFh WE RE Add-on BIOS 0D4000h – 0D7FFFh WE RE Add-on BIOS 0D8000h – 0DBFFFh WE RE Add-on BIOS 0DC000h – 0DFFFFh WE RE Add-on BIOS 3.1.4 Extended System BIOS Area (E_0000h-E_FFFFh) This 64 KB area (000E_0000h – 000E_FFFFh) is divided into four 16 KB segments. Each segment can be assigned independent read and write attributes so it can be mapped either to main DRAM or to DMI Interface. Typically, this area is used for RAM or ROM. Memory segments that are disabled are not remapped elsewhere. Non-snooped accesses from PCI Express or DMI to this region are always sent to DRAM. Table 3-2. Extended System BIOS Area Memory Segments Memory Segments Attributes Comments 0E0000h – 0E3FFFh WE RE BIOS Extension 0E4000h – 0E7FFFh WE RE BIOS Extension 0E8000h – 0EBFFFh WE RE BIOS Extension 0EC000h – 0EFFFFh WE RE BIOS Extension |
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