If you want to get more documents and demos’ source code for pcDuino8 Uno, please check the following websites.
This book is the github repository collecting documents and demos about Starter kit for pcDuino8 Uno and let user quick start on pcDuino8 Uno.
This website has collected different system image for pcDuino8 Uno, including Ubuntu and Android.
This website has been collected many posts on pcDuinos, not only pcDuino8 Uno.
If you have any question, please post it there, LinkSprite Engineers will try their best to answer your questions.