INT 2F - Futurus Team - INSTALLATION CHECK
        AX = A4E0h
Return: AL = 52h ("R") if installed
            AH = major version plus 30h ("0")
            ES:BX -> ??? (INT A4 handler???)
Note:   older versions of Right Hand Man (from which Team evolved) store the
          signature "RH" at offset 103h in the INT 2F handler's segment