The Datasheet is in my Post #12 - RS0012
I have the Titel changed in RS0012 - should be compatible with WS0012.
Raystar and Winstar is the same Manufacturer and the PCB is equal.
Even in 8bit Modus is the Display without Function.
I have das big Display exange the smal Display - simply replaced of the Breadboard (the Wiring ist 1:1).
In the next days i will change this CrystalFonts Exampel - mayby works the Display finally.