've checked the pinout and the Amiga supplies 5V on pin 14 (if I meanwhile didn't forgot). So plugging a Bidirectional cable might damage the PC side of things no? I 'd like someone to confirm this.
It does, unless the PC can stand it, or you don't connect that pin, or you use an I/O extender that has a PC mode...
Whats the use of parallel ports these days outside of connecting old computers up with them anyhow...