37
2 Technical
Reference
What This Chapter Contains
2.1
Memory Map ................................................................................................................ 37
2.2
DMA Channels ............................................................................................................. 38
2.3
Fixed I/O Map............................................................................................................... 39
2.4
PCI Configuration Space Map...................................................................................... 40
2.5
Interrupts ...................................................................................................................... 41
2.6
PCI Conventional Interrupt Routing Map ..................................................................... 42
2.7
Connectors................................................................................................................... 43
2.8
Jumper Block ............................................................................................................... 52
2.9
Mechanical Considerations .......................................................................................... 53
2.10
Electrical Considerations.............................................................................................. 55
2.11
Thermal Considerations ............................................................................................... 57
2.12
Reliability...................................................................................................................... 59
2.13
Environmental .............................................................................................................. 60
2.14
Regulatory Compliance................................................................................................ 61
2.1 Memory Map
Table 9 lists the system memory map.
Table 9.
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
Potential available high DOS
memory (open to the PCI
Conventional bus). Dependent on
video adapter used.
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