[syslinux] keystrokes

[Ady]

Hello Syslinux Team,

What actions are _supposed_ to be triggered by each of:

  [Ctrl-J] 
  [Ctrl-M] 

in the Syslinux command line in version 6.03-pre20?

Are there any differences between CLI and [vesa]menu.c32 regarding 
these keystroke combinations?

Are there any differences in their behaviors when booting with 
different Syslinux variants (e.g ISOLINUX vs. SYSLINUX vs.  
PXELINUX)?

To be clear, I am asking about what (in theory) *should* be 
happening, (which might or might not be the same as to what actually 
happens).

TIA,
Ady.