Intel D845EPI Intel Desktop Board D845EPI Technical Product Specification - Page 37

Technical Reference

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2 Technical Reference What This Chapter Contains 2.1 Introduction...37 2.2 Memory Map ...37 2.3 Fixed I/O Map...38 2.4 DMA Channels ...39 2.5 PCI Configuration Space Map 39 2.6 Interrupts ...40 2.7 PCI Interrupt Routing Map 41 2.8 Connectors ...43 2.9 Jumper Blocks...54 2.10 Mechanical Considerations 56 2.11 Electrical Considerations 58 2.12 Thermal Considerations 59 2.13 Reliability ...61 2.14 Environmental ...61 2.1 Introduction Sections 2.2 - 2.6 contain several standalone tables. Table 11 describes the system memory map, Table 12 shows the I/O map, Table 13 lists the DMA channels, Table 14 defines the PCI configuration space map, and Table 15 describes the interrupts. The remaining sections in this chapter are introduced by text found with their respective section headings. 2.2 Memory Map Table 11. System Memory Map Address Range (decimal) Address Range (hex) 1024 K - 2097152 K 100000 - 7FFFFFFF 960 K - 1024 K F0000 - FFFFF 896 K - 960 K E0000 - EFFFF 800 K - 896 K C8000 - DFFFF 640 K - 800 K 639 K - 640 K A0000 - C7FFF 9FC00 - 9FFFF 512 K - 639 K 0 K - 512 K 80000 - 9FBFF 00000 - 7FFFF Size 2047 MB 64 KB 64 KB 96 KB 160 KB 1 KB 127 KB 512 KB Description Extended memory Runtime BIOS Reserved Available high DOS memory (open to the PCI bus) Video memory and BIOS Extended BIOS data (movable by memory manager software) Extended conventional memory Conventional memory 37

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37
2 Technical Reference
What This Chapter Contains
2.1
Introduction
.................................................................................................................
37
2.2
Memory Map
..............................................................................................................
37
2.3
Fixed I/O Map
.............................................................................................................
38
2.4
DMA Channels
...........................................................................................................
39
2.5
PCI Configuration Space Map
....................................................................................
39
2.6
Interrupts
....................................................................................................................
40
2.7
PCI Interrupt Routing Map
..........................................................................................
41
2.8
Connectors
.................................................................................................................
43
2.9
Jumper Blocks
............................................................................................................
54
2.10
Mechanical Considerations
.........................................................................................
56
2.11
Electrical Considerations
............................................................................................
58
2.12
Thermal Considerations
..............................................................................................
59
2.13
Reliability
....................................................................................................................
61
2.14
Environmental
............................................................................................................
61
2.1 Introduction
Sections 2.2 - 2.6 contain several standalone tables.
Table 11 describes the system memory map,
Table 12 shows the I/O map, Table 13 lists the DMA channels, Table 14 defines the PCI
configuration space map, and Table 15 describes the interrupts.
The remaining sections in this
chapter are introduced by text found with their respective section headings.
2.2 Memory Map
Table 11.
System Memory Map
Address Range (decimal)
Address Range (hex)
Size
Description
1024 K - 2097152 K
100000 - 7FFFFFFF
2047 MB
Extended memory
960 K - 1024 K
F0000 - FFFFF
64 KB
Runtime BIOS
896 K - 960 K
E0000 - EFFFF
64 KB
Reserved
800 K - 896 K
C8000 - DFFFF
96 KB
Available high DOS memory (open
to the PCI bus)
640 K - 800 K
A0000 - C7FFF
160 KB
Video memory and BIOS
639 K - 640 K
9FC00 - 9FFFF
1 KB
Extended BIOS data (movable by
memory manager software)
512 K - 639 K
80000 - 9FBFF
127 KB
Extended conventional memory
0 K - 512 K
00000 - 7FFFF
512 KB
Conventional memory