HP Vectra Technical Reference Manual page 17

Memory Map Block Diagram
Interrupt Vectors
STD-BIOS Data Area
STD-BIOS Data Expansion Area and
Temporary DOS Buffers
Disc Operating System - (DOS)
Application Program Area
EX-BIOS Data Area
Video Display Memory
Video Adapter Card ROM
Adapter Card Option ROM
Processor ROM Extension
BIOS ROM
Extended Memory (Up to 15MB)
Image of ROM at OEOOOOH - OFFFFFH
OOOOOOH
~
0OO400H
0OO600H
0OO700H
Variable·
Top of Available RAM··
Top of RAM···
OAOOOOH
OCOOOOH
~
OC8000H
OEOOOOH
OFOOOOH
100000H
OFEOOOOH
8 ROM BIOS Overview
·The length of the operating system is revision dependent.
* *The Top of Available RAM is dependent on system configuration, in a
256KB system it is usually 03FOOOH while in 640KB system it is usually
09FOOOH.
* * *The Top of RAM is dependent on system configuration, in a 256KB
system it is 03FFFFH while in 640KB system it is 09FFFFH.
Figure 2.1
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