Comtrol API (6508) for the MS-DOS - Manual (Page 23)

23 API Functions
aaEnPeriodicEvent
aaEnPeriodicEvent
Enables or disables dispatching of the periodic event
function.
aaEnPeriodicEvent(State)
int State
TRUE to enable dispatching of
the periodic event function,
FALSE to disable dispatching.
void
The periodic event function is called 274 times a
second. Once installed, the periodic event function is
not dispatched until it is enabled with the
aaEnPeriodicEvent() function. The aaEnPeriodicEvent()
function can also be used to disable dispatching of the
periodic event function.
The event function must be installed with
aaInstallPeriodicEvent() before enabling dispatching.
Function
Purpose
Call
Return
Comments
Warning
aaExit
Performs cleanup when exiting from an application
program.
aaExit()
void
This function does cleanup tasks required when
exiting from an application, such as halting controller
interrupts and restoring the
IRQ vector used by the
controller.
Once aaInit() has been called, aaExit() must be called
before exiting the application program.
If the application program can be exited using the
CTRL+C or CTRL+BREAK keys, then the default DOS
CTRL+C handler must be replaced with a handler that
calls aaExit(). You can use the aaInstallCtrlCHandler()
function for this purpose.
Purpose
Call
Return
Comments
Warning