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Technical Reference

Table 11 lists the system memory map.

Table 11. System Memory Map

Address Range

(decimal)

Address Range

(hex)

Size

Description

1024 K - 8388608 K 100000 - 1FFFFFFFF 8191 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

2.2 DMA Channels

Table 12. DMA Channels

DMA Channel Number Data Width System Resource

0 8 or 16 bits Open

1 8 or 16 bits Parallel port

2 8 or 16 bits Diskette drive

3 8 or 16 bits Parallel port (for ECP or EPP)

4 8 or 16 bits DMA controller

5 16 bits Open

6 16 bits Open

7 16 bits Open

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 95 96

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