INT 2F CU - MS Windows WINOLDAP - SWITCHING ??? AX = 4602h Return: ??? Note: the DOS 5+ kernel intercepts this function and copies the previously-saved MCBsee Memory Control Block from the DOS data segment into the MCBsee Memory Control Block following the caller's PSPsee Program Segment Prefix memory block; in conjunction with AX=4601h, this intercept is used by DOS to avoid corruption of the Windows real-mode heap's end sentinel SeeAlso: AX=1700h,AX=4601h