INT 67 - Microsoft EMM386.EXE v4.20+ - INSTALLATION CHECK AX = FFA5h Return: AX = 845Ah/84A5h if loaded BX:CX -> API entry point (see #03666) Notes: this call is available even if EMM386 is not providing EMS the returned AX is 845Ah inside of MSWindows, 84A5h under bare DOS if no other program has hooked INT 67, an alternate installation check is to test for the string "MICROSOFT EXPANDED MEMORY MANAGER 386" at offset 14h in the INT 67 handler's segment; the word immediately preceding this string contains the offset of the API entry point SeeAlso: AH=3Fh,AX=FFA5h/BX=4345h,INT 21/AX=4402h"EMM386.EXE"