Function 68, subfunction 1 - switch to the next thread.
The function completes the current time slice allocated to the
thread and switches to the next. (Which thread in which process
will be next, is unpredictable). Later, when execution queue
will reach the current thread, execution will be continued.
Parameters:
- eax = 68 - function number
- ebx = 1 - subfunction number
Returned value:
- function does not return value