what are these options in ksp launcher?

[omelaw]

I always run ksp by KSP_x64.exe, so I didn't notice those option until now

Run in AMD compatibility mode.
Do not produce log
Run in framless window
Run in extended character set mode.
Run 64 bit player.

some of them are pretty straightforward, but what are AMD compatiblity mode and extened character set mode?

[sal_vager]

Hi @omelaw.

Run in AMD compatibility mode forces the Unity command line argument -force-gfx-direct
Do not produce log adds the -nolog command line argument.
Run in framless window adds -popupwindow
Run in extended character set mode prepends LC_ALL=C on Linux and OSX.
Run 64 bit player calls the 64bit binary on the platform if there is one (not needed for OSX)

Hope this helps.