Yeah you can do that. I've messed around with emitting square waves but not much else. There's also a problem with that where plugging something into the link p

Yeah you can do that. I've messed around with emitting square waves but not much else. There's also a problem with that where plugging something into the link port triggered an interrupt that diverted control back to the kernel which would then try to initiate communication with another calculator over the link. Not the desired behavior. In the best case this would cause serious lag. In the worst case, a crash and hard ram reset. You had to patch the kernel in order to output sound. Fun stuff.