System | Memory Map |
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Memory | is | mapped |
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Figure | shows | the memory map for a correctly functioning | |||||||||||||||
system. Memory | can | be | mapped | differently if POST detects an error | |||||||||||||
in | system | board | memory or RT/CMOS RAM. In the figure, the | ||||||||||||||
variablex represents the number | of 1MB blocks of system board | ||||||||||||||||
memory | starting | at | or | above the | hex 100000 boundary. | ||||||||||||
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Hex | Address | Range |
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| Function |
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00000000 | to | 0009FFFF |
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| 640KB | system board | RAM |
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000A0000 | to | 000BFFFF |
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| Video | RAM |
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000C0000 | to | 000C7FFF |
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| System | board | video | BIOS | ROM | mapped | to | |||||
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| RAM |
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000C8000 | to | 000EFFFF |
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| Channel | ROM |
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000F0000 | to | 000FFFFF |
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| 64KB | system | board ROM mapped to RAM |
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00100000 | to | (00100000 | + |
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| xMB | system | board RAM |
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xMB) |
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FFFF0000 | to | FFFFFFFF |
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| 64KB | system | board | ROM |
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| (same as 000F0000 to 000FFFFF) |
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Figure | Memory | Map |
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System | Board | Memory | Connector | for | DIMM |
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The | system | board |
| of | ThinkPad | 560 | has | one | DIMM | connector that |
directly accepts one
The system board of ThinkPad 560E has one DIMM connector that directly accepts one