Urboot u8.0

• Generally shorter(*) bootloaders given the same features
• New feature U which updates flash, ie, only changes flash when new content is different (less wear and faster)
• Pre-compiled bootloaders in urboot.hex

(*) The way urboot is compiled tends to fill out unused space with frills so that shorter code isn't readily visible, but it is

u7.7.1

u7.7 with corrected rjmp opcode to pgm_write_page() bootloader function

Urboot u7.7 release

This is the first public release of urboot that has been around since 2016. Urboot is a feature-rich small AVR bootloader using urprotocol with tight code (roughly half the size of optiboot), a highly modular feature set and direct support by AVRDUDE v7.1 onwards through its avrdude -c urclock programmer.