You might find this series of videos interesting: https://m.youtube.com/playlist?list=PLec1d3OBbZ8IBeFODHXLy0m0okuZhqJnT https://m.youtube.com/playlist?list=PL

You might find this series of videos interesting: https://m.youtube.com/playlist?list=PLec1d3OBbZ8IBeFODHXLy0m0okuZhqJnT https://m.youtube.com/playlist?list=PLec1d3OBbZ8IBeFODHXLy0m... A lot of hacky techniques in here. Some are hardware based 8e.g. a SoC for the quick start OS), some are software, and some are EFI firmware.