These are F3 board HEX files on Betaflight (BF) 4.1.0 (https://github.com/betaflight/betaflight/releases); technically some (not all) of the maintenance updates for 4.1.1 are included too. If you are looking for F4 or F7 targets, see the OFFICIAL BF release page (link above) or just use the drop-down in the BF configurator.
Disabled features to make BF fit on the F3 chip, include:
PWM receiver support
PPM receiver support
TBS Crossfire receiver support
Graupner Hott receiver support
RPM Filter (not working on F3 boards ... yet)
Max Rate Profiles of 3 (not 6)
Acro Trailer mode
Servo Support
Camera Control
Launch Control
Integrated Yaw
Thrust Linearization
GPS Support
Experimental Gyro DLPF mode
OSD Profiles (only 1)
Airemode lowpass filter
Other features that MAY BE excluded based on your board's specific ROM space, include:
I-term Relax
Throttle Boost
RC Filter smoothing
TPA Mode
PinIO support
RTC Time (from TX)
Extended CMS Menus
See the branch commits for what is defined or not based on the board's flash size and "Cut Level"
(if Flash is less than 128Kbytes).
If you don't see your F3 target below that means it failed to build, which means it didn't build with the above adjustments (not enough space). I did not go back to confirm that ALL the F3 targets successfully built. Let me know if you don't see your target and if I have time, I can take a deeper look.
Alternatively, see my playlist: https://www.youtube.com/playlist?list=PLcYNkvInloJFyMqJv0Lue-IsvkXTf_o5x to learn how to build your own targets to include whatever you like in BF and shoot me an email: spatzengr at yahoo.com if you have a question or need help.
See the tuning guide at: https://github.com/betaflight/betaflight/wiki/4.0-Tuning-Notes
OR
My Tuning Principles series at: https://www.youtube.com/playlist?list=PLcYNkvInloJFbZmLf_X72M3fEZB-BKkiQ