Downloading AP4 for RL78 1.12.0091 from our website was free. AP4 for RL78 was developed to work on Windows 7, Windows 8, Windows 10 or Windows 11 and is compatible with 32-bit systems. The following version: 1.1 was the most frequently downloaded one by the program users. This free program was originally developed by Renesas Electronics Corporation. The software lies within System Utilities, more precisely Device Assistants. The program's installer is commonly called Applilet4.exe.
From the developer:
AP4 is a standalone tool for automatically generating control programs (device driver programs) for peripheral modules in accordance with user settings. RL78 microcontroller is based upon a 16 bit CISC architecture with analogue rich functionality. AP4 provides a multi-tabbed interface where you can easily setup controller parameters using block diagrams, drop-down menus, and check-boxes, without programming.
You may want to check out more software, such as Renesas YRPBRL78G13, which might be related to AP4 for RL78.