HP Vectra Technical Reference Manual page 311

F_
YIELD (AH
=
2AH)
Currently loads AH with RS_SUCCESSFUL and does an IRET. This is a "hook" for multitasking
systems.
On Entry: BP
=
V_SYSTEM (12H)
AH
=
F_YIELD (2AH)
On Exit: AH
=
Return Status Code
Registers Altered: AH, BP, DS
F_SND_CLICLENABLE (AH
=
30H)
Enables the keyclick function and flushes any pending keyclicks.
On Entry: BP
=
V_SYSTEM (12H)
AH
=
F_SND_CLICLENABLE (30H)
On Exit: AH
=
Return Status Code
Registers Altered: AH, BP, DS.
F_SND_CLICLDISABLE (AH = 32H)
Disables the keyclick function, sets the EX-BIOS global data area T_SND_CLICLDURA byte to
zero, and flushes any pending keyclicks.
On Entry: BP
=
V_SYSTEM (12H)
AH
=
F _SND_CLICLDISABLE (32H)
On Exit: AH
=
Return Status Code
Registers Altered: AH, BP, DS
302 System Drivers