The PC64 cable
The PC64 cable is a semi-parallel cable that connects Commodore machines to the PC parallel port. It's compatible with all PC parallel ports and Commodore 64 and 128 machines.
You need the following hardware to make use of this cable:
The following PC softwares support this cable:
You can find the details on how to build this cable at the construction page.
Connect the user port plug onto the user port of your Commodore machine, being very careful not to do it upside down, otherwise you may kill your PC parallel port within a second! Connect the parallel plug into the parallel port of your PC.
The PC64 cable is © Wolfgang Lorenz, 1994-1996.
Source: The Joe Forster-STA homepage