The standard binary output format generated by the linker for the Lynx target is a cart image. By specifying the config file lynx-bll.cfg the linker will generate BLL download compatible binary files.
It is of course possible to change this behaviour by using a modified startup file and linker config.
The bootloader used in the cc65 lynx library uses a very minimal bootloader that does not check the cart or show a title screen.
The advantage of this bootloader is that it allows creation of cart images to many common formats.
Cart sizes
Block size Rom size Description
512 bytes 128k Standard old games like Warbirds
1024 bytes 256k Most common format for homebrew. Also newer games like Lemmings
2048 bytes 512k Largest games like EOTB