HP Vectra Technical Reference Manual page 114

SF_START (AJ<
=
0202H)
This subfunction enables the interrupts on the HP 8259A slave interrupt controller.
On Entry: AH
=
F_SYSTEM (02H)
AL
=
SF_START (02H)
BP
=
V_S8259 (001 EH)
On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
SF_ VERSION_DESC (AJ<
=
0206H)
This subfunction returns the release date code and a double word pointer to the current version
number. The date code consists of two BCD coded bytes containing the year and week of
release. The BL register contains the number of years since 1960 and the BH register contains the
week of the year.
On Entry: AH
=
F_SYSTEM (02H)
AL
=
SF_ VERSION_DESC (06H)
BP
=
V_S8259 (001 EH)
On Exit: AH
=
Return Status Code
BX
=
Release date code
CX
=
Number of bytes in current version number
ES:DI
=
Pointer to the current version number
Registers Altered: AX, BX, CX, DI, ES, BP, DS
SF_ENABLE_SVC (AJ<
=
00400H)
This function unmasks (enables) the 8041 SVC interrupt on the HP 8259A slave controller.
On Entry: AH
=
F_IO_CONTROL (04H)
AL
=
SF_ENABLE_SVC (DOH)
,... BP
=
V_S8259 (001 EH)
On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
Input System and HP-HIL 105