Int 67H [EMS 3.0] Function 4BH (75) Get handle count

Returns the number of active expanded memory handles.

Call with:

AH = 4BH

Returns:

If function successful

AH = 00H

BX = number of active EMM handles

If function unsuccessful

AH = error code

Notes:

If the returned number of EMM handles is zero, the expanded memory manager is idle, and none of the expanded memory is in use.

The value returned by this function is not necessarily the same as the number of programs using expanded memory because one program may own multiple EMM handles.

The number of active EMM handles never exceeds 255.