How do I integrate the link cable into my projects?

[winteriscoming]

It reads to me as if the RTS/CTS handshake are baked into the built in commands. So each system is responsible for setting its RTS to off when communication should pause, and back on when communication can continue. The send commands don't send when the linked system is not ready to receive. It's not clear to me if one system simply waits for the other to be ready before continuing. Like, would one system just halt execution until the other is ready? Maybe?

I guess the idea is that it can pause communication during interrupts. So maybe rts off at the beginning of vblank and rts on at the end would allow the vgm player to work as is? It would get handled when communication is paused.