Looks like a classic T6963 display module.
U8g2 library supports this controller, but this specific dimension is not yet supported. Still you should be able to see "something" with the existing u8g2 drivers. My suggestion is this:
- Setup your hardware
1.1 Remember to connect pin FG the display to ground
1.2 Get a suitable -20V to -25V source for your V0 input (according to your datasheet chapter 7). DC-DC converter like the AM1P-0524DZ might be required here.
1.3 Connect your display to your Arduino, best is to make connection table (Arduino Pin number vs. display pin name) - Install U8g2 library in the Arduino
- Use this constructor for your display u8g2setupcpp · olikraus/u8g2 Wiki · GitHub
- Update the constructor arguments according to your connection table
- Execute examples, make some pictures
- Create an issue on the u8g2 github page and we will work together to implement the 256x128 display variant
Other option might be to search for a different T6963 Arduino lib which supports your resolution...
Oliver