Collection of hard to find datasheets for MStar ICs.
See more at https://blog.obsoletemadness.com/2021/01/02/mstar-datasheets/
If you have any please feel free to submit a Pull Request.
If you look on line (cough http://en.pudn.com/ cough) you'll likely come across some source code to various MStar platforms. Of interest will be the registers and the initialisation code. I haven't uploaded these due to the unknown copyright status, but betwen that code and datasheets there should be enough to play with.