Solved: Getting an app up and running from the PicoCalc bootloader

[pelrun]

Have a look at the uf2loader release thread for the links:

UF2 Loader release

The SDBoot/multi_booter bootloader that @adwuard and @guu amongst others have done a bunch of work on is fantastic but it has a couple of glaring limitations that I couldn’t tolerate: It requires recompiling every application with a custom linker script It only reads .bin files instead of the usual .uf2 format, so various platform safety features are lost UF2 Loader is a reworked version of the bootloader that fixes these two issues. Just stick (almost) any uf2 file you like onto the SD card,…

Installation is similar to the older bootloaders, but there’s an extra file that needs to be put on the SD card which contains the UI. (flash bootloader_pico.uf2 to the board, put BOOT2040.uf2 on the sdcard, make a pico1-apps folder on the card and put your uf2’s in there.) It also supports the Pico 2 if you decide to swap to that.