
4 BIOS overview
BIOS addresses
BIOS addresses
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.
system memory map
0000 | 0000 | - 0000 03FF | ||
|
|
|
| |
0000 | 0400 | - 0000 04FF | BIOS Data Area | |
|
|
|
| |
0000 | 0500 | - 0009 FC00 | Used by OS | |
|
|
| ||
0009 | FC00 - 0009 FFFF | Extended BIOS Data Area | ||
|
| |||
000A_0000 - 000B_FFFF | Video RAM or | |||
|
|
|
| SMRAM (not visible unless in SMM) |
|
|
|
| |
000C | 0000 | - 000C 7FFF | Video ROM | |
|
|
|
| |
000C | 8000 | - 000F FFFF | Adapter ROM, RAM, | |
|
|
| ||
000E 0000 | - 000F FFFF | System BIOS (Flash/Shadow) | ||
|
| |||
10 0000 - FF FFFF | Memory (1 MB to 16 MB) | |||
|
|
| ||
100 0000 | - 1FF FFFF | Memory (16 MB to 32 MB) | ||
|
|
| ||
200 0000 | Memory (32 MB to 64 MB) | |||
|
|
| ||
400 0000 | Memory (64 MB to 512 MB) | |||
|
| |||
FFF80000 - FFFF FFFF | 512 KB BIOS (Flash) | |||
|
|
|
|
|
hp I/O port map (I/O addresses used by the system)
Peripheral devices, accessory devices and system controllers are accessed via the system I/O space, which is not located in system memory space. The 64 KB of addressable I/O space comprises
34