Updating an old Remote Control

I recently replaced the controller of my old Graupner mc-17 remote control with a current ARM Cortex-M4 @ 96MHz (Teensy 3.1). Yesterday I soldered the sockets for the LCD, the buttons, and the ammeter which gives me access to almost all peripherals (only the power switch and the additional linear channel are still missing). I already found an Arduino library for the LCD controller NEC mPD7225, thanks tronixstuff, but the display which Graupner used differs from the standard one. Basically the LCD works, but the demo sketch just gives scrambled output. I guess I’ll have to reverse-engineer this application specific LCD.

mc-17 with new Teesny 3.1 micro-controller
Graupner mc-17 top