Bios Addresses - HP E-PC C10 Technical Reference Manual

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
0000 0500 - 0009 FC00
0009 FC00 - 0009 FFFF
000A_0000 - 000B_FFFF
000C 0000 - 000C 7FFF
000C 8000 - 000F FFFF
000E 0000 - 000F FFFF
10 0000 - FF FFFF
100 0000 - 1FF FFFF
200 0000 -3FF FFFF
400 0000 -1FFF FFFF
FFF80000 - FFFF FFFF
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 8-bit and 16-bit registers (called
I/O ports) located in the various system components.
34
Real-mode IDT
BIOS Data Area
Used by OS
Extended BIOS Data Area
Video RAM or
SMRAM (not visible unless in SMM)
Video ROM
Adapter ROM, RAM, memory-mapped registers
System BIOS (Flash/Shadow)
Memory (1 MB to 16 MB)
Memory (16 MB to 32 MB)
Memory (32 MB to 64 MB)
Memory (64 MB to 512 MB)
512 KB BIOS (Flash)