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System DMA specifications
Hardware DMA | System function |
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DMA0 | Not applicable |
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DMA1* | Not applicable |
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DMA2* | Not applicable |
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DMA3 | Not applicable |
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DMA4 | Direct memory access controller |
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DMA5* | Available for PC Card |
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DMA6 | Not assigned |
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DMA7 | Not assigned |
*PC Card controller can use DMA 1, 2, or 5.
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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48 | KB | Video BIOS | |
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160 KB | Unused | ||
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64 | KB | System BIOS | |
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15 | MB | Extended memory | |
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58 | MB | Super extended memory | |
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58 | MB | Unused | |
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2 MB | Video memory (direct access) | ||
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4 GB | Unused | ||
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64 | KB | System BIOS | |
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System DMA specifications 85