Intel BLKD945GNTL Product Specification - Page 47
Technical Reference
UPC - 735858174701
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2 Technical Reference What This Chapter Contains 2.1 Introduction ...47 2.2 Memory Resources ...47 2.3 DMA Channels ...49 2.4 Fixed I/O Map...50 2.5 PCI Configuration Space Map 51 2.6 Interrupts ...52 2.7 PCI Conventional Interrupt Routing Map 53 2.8 Connectors...55 2.9 Jumper Block ...67 2.10 Mechanical Considerations 68 2.11 Electrical Considerations 71 2.12 Thermal Considerations 73 2.13 Reliability...75 2.14 Environmental ...76 2.15 Regulatory Compliance 77 2.1 Introduction Sections 2.2 - 2.6 contain several standalone tables. Table 10 describes the system memory map, Table 11 lists the DMA channels, Table 12 shows the I/O map, Table 13 defines the PCI Conventional bus configuration space map, and Table 14 describes the interrupts. The remaining sections in this chapter are introduced by text found with their respective section headings. 2.2 Memory Resources 2.2.1 Addressable Memory The board utilizes 4 GB of addressable system memory. Typically the address space that is allocated for PCI Conventional bus add-in cards, PCI Express configuration space, BIOS (SPI Flash), and chipset overhead resides above the top of DRAM (total system memory). On a system that has 4 GB of system memory installed, it is not possible to use all of the installed memory due to system address space being allocated for other system critical functions. These functions include the following: • BIOS/ SPI Flash (2 MB) • Local APIC (19 MB) • Digital Media Interface (40 MB) • Front side bus interrupts (17 MB) • PCI Express configuration space (256 MB) 47