Link Cable functionality

[last-genius]

Is there any way to use the link cable/serial communication to communicate between two running instances of the emulator, either locally or remotely? Or would this require implementing the SerialDevice interface for a new device?

[joamag]

@last-genius Unfortunately (and at least for now); the link cable functionality is only used for debugging (stdout-like output) in test ROMs and GameBoy printer emulation.
But I agree that it would be fantastic to have NetPlay-like connectivity via Serial emulation - something for the future or for someone to help.

Do you know of any specific scenario you'd like to explore with this functionality?

[last-genius]

There are plenty Game Boy games that have local multiplayer through the link cable (or even 4-player multiplayer through another adapter), but most emulators do not implement the link cable functionality correctly, resulting in some of these not connecting perfectly or at all - kind of an ultimate test for the accuracy of emulation, though obviously not a priority task.