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2 Technical Reference
What This Chapter Contains
2.1 Introduction.................................................................................................................37
2.2 Memory Map ..............................................................................................................37
2.3 DMA Channels ...........................................................................................................38
2.4 Fixed I/O Map.............................................................................................................38
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............................................................................................................56
2.10 Mechanical Considerations.........................................................................................58
2.11 Electrical Considerations ............................................................................................60
2.12 Thermal Considerations..............................................................................................61
2.13 Reliability....................................................................................................................63
2.14 Environmental ............................................................................................................64
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
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 Map
Table 10 lists the system memory map.
Table 10. 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 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