Bluebie is developing µBoot, a tiny USB bootloader that only consumes 2.1 Kilobytes of flash on an ATtiny85. It’s based on USBaspLoader-tiny85 bootloader but loses ~0.7KB by customizing it’s functionality.
µBoot is a tiny bootloader for attiny85 chips. Weighing in at just under 2.1kb it leaves more free space to uploaded programs than any other usb bootloader I know of. I made it over this past weekend and it’s coming along quite nicely, already useful for some types of projects.
Via the forum.
Renamed it to micronucleus to avoid confusion with an ARM bootloader of the same name. https://github.com/Bluebie/micronucleus-t85 is the new github address. I setup another with the old name instructing people how to get to the new repo.
uBoot is not ARM only.
It began as PPCBoot, then forked to ARM as ARMboot, then the forks were merged and a new name, uBoot, was chosen.
On the way it got ported to MIPS, x86, and more.
Good to know! :)