VTDAPI_Timer_Start

; Obtain the entry point address in VTDAPI_Addr
mov di, SEG TimerParams
mov es, di
mov bx, OFFSET TimerParams
mov ax, VTDAPI_Timer_Start
call VTDAPI_Addr

mov [Timer_ID], ax
 

Register a timer callback to be called at periodic intervals. Limited to 32 timers.

• Returns a 16-bit handle to the timer if successful; otherwise returns zero.

TimerParams

Address of VTDAPI_Timer_Parameters structure.