INT 67 - LIM EMS 4.0 - PREPARE EXPANDED MEMORY HARDWARE FOR WARM BOOT AH = 5Ch Return: AH = status (see #03663) Note: when MS-DOS v6.xx EMM386 is loaded and the keyboard driver supports INT 15/AH=4Fh (keyboard intercept) calls, the system may hang instead of booting if this function is called just prior to a jump to F000h:FFF0h