Intel BOXD865PERL Product Specification - Page 52
Detailed System Memory Address Map
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Intel Desktop Board D865PERL Technical Product Specification memory, AGP aperture set for 256 MB, and the PCI cards are requesting 200 MB of system address space. 4 GB Top of System Address Space FLASH APIC Reserved ~20 MB PCI Memory Range (contains AGP window, AGP aperture, PCI, and ICH ranges) DRAM Range DOS Compatibility Memory Top of usable DRAM (memory visible to the operating system) 1 MB 640 KB 0 MB 0FFFFFH 0F0000H 0EFFFFH 0E0000H 0DFFFFH 0C0000H 0BFFFFH 0A0000H 09FFFFH 00000H Upper BIOS area (64 KB) Lower BIOS area (64 KB; 16 KB x 4) Add-in Card BIOS and Buffer area (128 KB; 16 KB x 8) Standard PCI/ ISA Video Memory (SMM Memory) 128 KB * DOS area (640 KB) 1 MB 960 KB 896 KB 768 KB 640 KB 0 KB * Optionally mapped to the internal AGP OM16106 Figure 18. Detailed System Memory Address Map 52