Minos is my open source replacement for the stock software on a Kindle its just a minimal reader. I first wanted to flash CrossPoint Reader, but it’s built for ESP32-based e-readers and my Kindle runs an ARM i.MX508, so it couldn’t run. I decided to write my own CrossPoint-style reader in C++ that draws directly to the framebuffer. The hardest part was getting the e-ink refresh to stop ghosting, and I fixed it by making the page refresh only twice for the images. It can now also play sudoku and checkers , and next I want to add other games like chess and woordle.