I've just received from Sunhokey their last version of the MARLIN firmware for the Sunhokey's PRUSA I3.
I've uploaded it in my new MKS Gen-2Z V1.2 motherboard, and everything just went fine. I even adapted the configuration to accept a 12864 Graphic LCD Display (from the factory, there is a 2004 screen on their printer). It worked perfectly and at the first attempt.
Attached here is the file for the ones in need.
My advice (from a beginner)... Before opening it, just study in various good blogs how to configure the MARLIN software. It is what I did and I've rapidly got a wider understanding of this matter, enough to feel confident to go further.
You will discover that this sofware is complex (a lot of parameters may be modified), but not complicated (each step is easy to configure when we give some attention to it).
Moreover, you will discover that this software is also suitable for almost all kinds of common motherboards and printers, which then can the be easily setup once the basic principles of the software will be understood.
A last thing, this version given by Sunhokey is ready to be used with their printer.
Hope it helps...