Technical Reference
Desktop Board ResourcesMemory Map
Table 27. System Memory Map
Address Range (decimal) | Address Range (hex) | Size | Description | |
1024 K - 524288 K | 100000 - 1FFFFFFF | 511 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 |
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|
|
| 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 |
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|
|
| memory manager software) |
512 | K - 639 K | 80000 - 9FBFF | 127 KB | Extended conventional memory |
0 K - 512 K | 00000 - 7FFFF | 512 KB | Conventional memory | |
DMA Channels
Table 28. DMA Channels
DMA Channel Number | Data Width |
0 | 8 or 16 bits |
1 | 8 or 16 bits |
2 | 8 or 16 bits |
3 | 8 or 16 bits |
4 | 8 or 16 bits |
5 | 16 bits |
6 | 16 bits |
7 | 16 bits |
System Resource
Audio
Audio / parallel port
Diskette drive
Parallel port (for ECP or EPP) / audio
DMA controller
Open
Open
Open
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