The actual duration of the wait is always an integral multiple of 976 microseconds.Suspends the calling program for a specified interval in microseconds.
Call with:
AH = 86H
CX:DX = microseconds to wait
Returns:
If function successful (wait was performed)
Carry flag = clear
If function unsuccessful (wait was not performed)
Carry flag = set
Notes:
The actual duration of the wait is always an integral multiple of 976 microseconds.
Use of this function allows programmed, hardware-independent delays at a finer resolution than can be obtained through use of the MS-DOS Get Time function (Int 21H Function 2CH, which returns time in hundredths of a second).
See also Int 15H Function 83H, which triggers a semaphore after a specified interval but does not suspend the calling program.