Looking at the photo I see at least five pins, I think there are six and the bottom two look like one because of the pic. I think it's a 1541 to serial port cable myself. Looking at a PC here (in this case a Pegasos) the par port is the same gender as this cable, so it either is a serial port cable, or it goes to an Amiga 1000's parallel port. The Amiga 1000's par port is male instead of the standard female for some reason. (I looked at my 1000 to make sure I was not mistaken on this.)
