INT 67 - LIM EMS 4.0 - MOVE/EXCHANGE MEMORY REGION AH = 57h AL = subfunction 00h move memory region 01h exchange memory region DS:SI -> structure describing source and destination (see #03653) Return: AH = status (see #03652) Note: source and destination may overlap for a move, in which case the copy direction is chosen such that the destination receives an intact copy of the source region