HP Vectra Technical Reference Manual page 29

Interrupt Vectors
and
HP_VECTOLTABLE
STD-BIOS
DRIVER
EX-BIOS
DRIVER
DATA
AREA
HP_HEADER
HP_ENTRY_
CODE
IP
CS
OS
IP
CS
IP
CS
INTERRUPT HP_VECTOR_
VECTORS TABLE
EX-BIOS DRIVER
INT OH
IP
IP
C'S
CS
OS
EX-BIOS
DRIVER
IP
IP
CODE
CS CS
9
OS
0'
U
INT 06FH
t - - - - - - - - - 4
INT OFFH
t - - - - - - - I
Figure 2.2
20 ROM BIOS Overview