Technical Reference; Memory Map; System Memory Map - Intel D945PLNM Specification

2 Technical Reference

What This Chapter Contains
2.1 Memory Map ................................................................................................................ 41
2.2 Fixed I/O Map............................................................................................................... 42
2.3 DMA Channels ............................................................................................................. 43
2.4 PCI Configuration Space Map...................................................................................... 43
2.5 Interrupts ...................................................................................................................... 44
2.6 PCI Conventional Interrupt Routing Map ..................................................................... 45
2.7 Connectors................................................................................................................... 46
2.8 Jumper Block ............................................................................................................... 56
2.9 Mechanical Considerations .......................................................................................... 57
2.10 Electrical Considerations.............................................................................................. 59
2.11 Thermal Considerations ............................................................................................... 61
2.12 Reliability...................................................................................................................... 63
2.13 Environmental .............................................................................................................. 64
2.14 Regulatory Compliance................................................................................................ 65

2.1 Memory Map

Table 8 lists the system memory map.
Table 8.

System Memory Map

Address Range (decimal)
1024 K - 2097152 K
960 K - 1024 K
896 K - 960 K
800 K - 896 K
640 K - 800 K
639 K - 640 K
512 K - 639 K
0 K - 512 K
Address Range (hex)
100000 - 7FFFFFFF
F0000 - FFFFF
E0000 - EFFFF
C8000 - DFFFF
A0000 - C7FFF
9FC00 - 9FFFF
80000 - 9FBFF
00000 - 7FFFF
Size Description
2047 MB Extended memory
64 KB Runtime BIOS
64 KB Reserved
96 KB Potential available high DOS
memory (open to the PCI
Conventional bus). Dependent on
video adapter used.
160 KB Video memory and BIOS
1 KB Extended BIOS data (movable by
memory manager software)
127 KB Extended conventional memory
512 KB Conventional memory
41