![System memory map specifications](/images/new-backgrounds/222435/222435193x1.webp)
Specifications
System memory map specifications
Size | Memory address | System function |
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640 KB | Base memory | |
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128 KB | Video memory | |
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64 KB | Video BIOS | |
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64 KB | System BIOS | |
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| 00100000- XFFFFFFF | Extended memory (based on |
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| memory installed) |
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| PCI bus | |
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| High precision event timer | |
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| PCI bus | |
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Maintenance and Service Guide |