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BIOS Addresses
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This section provides a summary of the main features of the HP system BIOS. This is software that provides an interface between the computer hardware and the operating system.The procedure for updating the System ROM firmware is described on page 68.
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Reserved memory used by accessory boards must be located in the area from C8000h to EFFFFh.
0000 0000 - 0000 03FF | |
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0000 0400 - 0000 04FF | BIOS Data Area |
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0000 0500 - 0009 FC00 | Used by Operating System |
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0009 FC00 - 0009 FFFF | Extended BIOS Data Area |
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000A_0000 - 000B_FFFF | Video RAM or |
| SMRAM (not visible unless in SMM) |
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000C 0000 - 000C 7FFF | Video ROM (VGA ROM) |
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000C 8000 - 000F FFFF | Adapter ROM, RAM, |
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000E | 128 KB BIOS (Flash/Shadow) |
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0001 | Memory (1 MB to 16 MB) |
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0010 | Memory (16 MB to 32 MB) |
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0020 | Memory (32 MB to 64 MB) |
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0040 | Memory (64 MB to 128 MB) |
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0080 | Memory (128 MB to 2 GB) |
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FECO 0000 | I/O APIC |
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FEEO 0000 | Local APIC (each CPU) |
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FFFE | 128 KB BIOS (Flash) |
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