As I mentioned, none of the native API of PalmOS 5.x was ever documented. There was a small number of people who figured out some parts of it, but nobody really got it all, or even close to it. To start with, because large parts are not useful to an app developer, and thus attracted no interest. This is a problem, however, if one wants to make a new device. So I had to actually do a lot of reverse engineering for this project – a lot of boring reverse engineering of very boring APIs that I still had to implement. Oh, and I needed a kernel, and actual hardware to run on.
from Dangerous Prototypes https://ift.tt/2M8HchM