HP Vectra Technical Reference Manual page 304

F_INS_FREEOWNDS (AH
=
12H)
Installs a vector in the next free entry of the HP_VECTOLTABLE and calls it with an SF_INIT
function. Upon returning from initialization, the routine returns its DS in the BX register.
Warning
If the SF_INIT function returns with an error code of RS_FAIL (OFEH) the power-on
self test sequence will be executed.
On Entry: BP
=
V_SYSTEM (12H)
AH
=
F_INS_FREEOWNDS (12H)
BX
=
Vector address to be installed
ES:DI
=
CS:IP of the device
On Exit: AH
=
Return Status Code
o
=
RS_SUCCESSFUL
Registers Altered: AH, BP, DS
F_INS_FREEGETDS (AH = 14H)
Installs a vector in the next free entry of the HP_VECTOLTABLE and calls it with an SF_INIT
function. This function is used if the driver needs EX-BIOS RAM for its data segment.
F_INS_FREEGETDS calls the routine to initialize with the "last used DS" in the BX register. The
routine's initialization code decrements the "last used DS" value and returns it to
F_INS_FREEGETDS.
Warning
If the SF_INIT function returns with an error code of RS_FAIL (OFEH) the power-on
self test sequence will be executed.
On Entry: BP
=
V_SYSTEM (12H)
AH
=
F_INS_FREEGETDS (14H)
ES:DI
=
CS:IP of the routine
On Exit: AH
=
Return Status Code
o
=
RS_SUCCESSFUL
Registers Altered: AH, BP, DS
Example: Install the ACME_INT vector in the next free vector and allocate two paragraphs of
data when its initialization routine gets called.
System Drivers 295