The PD17P236 is a model of the PD17236 with a one-time PROM instead of an internal mask ROM. Since the user can write programs to the PD17P236, it is ideal for experimental production or small-scale production of the PD17230, 17231, 17232, 17233, 17234, 17235, or 17236 systems. When reading this document, also read the documents related to the PD17230, 17231, 17232, 17233, 17234, 17235, and 17236.