INT 60 - MDEBUG - SET STATUS
        AH = 02h
        DS:SI -> password or a null byte
        ES = new value for the register SE
        DI = new value for the register OF
        CH = new monitor color if nonzero
        CL = new interpreter color if nonzero
        BH = new monitor start line if nonzero
        BL = new interpreter start line if nonzero
        AL = new ASCII code for the hotkey ('A'..'Z', 'a'..'z') if nonzero
        DL = new status of the special keys (SHIFT, ALT, CTRL) for the hotkey
            if nonzero
        DH = if nonzero, new basic process number for communication with the
            drivers (DH = multiplex number for the display driver,
            DH+1 = multiplex number for the command driver or drivers)
Return: AX = return code
            FFFFh call not allowed
            FFFEh password is invalid
            FFFDh display mode is invalid
            0000h successful, status changed
           else AL = error code
                    bit 0 invalid monitor start line
                        1 invalid interpreter start line
                        2 invalid hotkey
                        3 invalid process number
                      4-7 reserved
Note:   the values of the registers SE and OF are always changed, the other
          values are only changed if they are valid