It loads external boot loader/firmware update tool file (usbloader.bin) via emergency serial port available if the firmware is corrupted or boot pin (test point) is shorted to the ground.
Moreover, balong-usbload would patch "unsafe" usb loaders automatically, and if it failed to do so, won't allow you to load unpatched loaders without `-c` flag to prevent flash erasure.
### Pre-Compiled Package
[Fedora Linux 5.18.7-200.fc36.x86_64 x86_64](https://git.zaage.it/robert/-/packages/generic/balong-usbload)