HP Vectra Technical Reference Manual page 445

SF_INTERVAL (AX
=
0214H)
Reports to the driver that its interval event number has occurred.
On Entry: AH
=
F_SYSTEM (02H)
AL
=
SF_INTERVAL (14H)
BP
=
Driver's vector address
On Exit: AH
=
Return Status Code
SF_TEST (AX
=
0216H)
The driver performs a hardware test and reports RS_FAIL if the test failed. A driver need only
execute a test procedure if it directly interfaces to physical hardware.
On Entry: AH
=
F_SYSTEM (02H)
AL
=
SF_TEST (16H)
BP
=
Driver's vector address
On Exit: AH
=
Return Status Code
On test failure:
ex
=
The length of the string pointed to by ES:DI
ES:DI
=
Pointer to a string of information about the nature of the error
F_10_CONTROL (AH
=
04H)
This is a collection of driver dependant control subfunctions. Drivers of the same class should
implement similar subfunctions. The following is a list of predefined driver subfunction codes and
a brief description of their purpose and parameters:
SF_LOCK (AX
=
0400H)
Reserves the indicated addresses on an already allocated driver for exclusive access.
On Entry: AH
=
F_IO_CONTROL (04H)
AL
=
SF_LOCK
(OOH)
DH,DL
=
Major and minor address (Optional)
BP
=
Driver's vector address
On Exit: AH
=
Return Status Code
436 Driver Writer's Guide