[Coco] Educate me about Y-Cables

[Joe Grubbs]

I've seen a number of references to people using Y-cables to facilitate the use of more than one program pak. Is there a vendor for these? If not, is there a description of how to make one?

What kind of paks can someone use simultaneously with one of these? I was always under the impression that paks could only be operated one at a time (hence the selector switch on the MPI), however a Y-cable seems to imply this isn't always the case.