INT 60 u - HP 95LX System Manager - LET SYSMGR PROCESS FILE SEL MENU KEYSTROKE
        DI = 0207h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file menu structure (see INT 60/DI=0205h)
                DWORD   pointer to edit record (see INT 60/DI=0400h)
                WORD    keystroke
Return: AX = status
            0000h keystroke processed, call INT 60/DI=0206h to refresh menu
            0001h redisplay application area before refreshing menu
            0002h user confirmed selection, filename is in edit record's buffer
            0003h user aborted menu
            FFFBh bad filename
            FFFCh bad directory
            FFFDh bad drive
            FFFEh unknown keystroke
            FFFFh keystroke known but invalid in current context
        STACK unchanged
SeeAlso: INT 60/DI=0205h,INT 60/DI=0208h

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