The XP1571 parallel cable

for Commodore 1570 and 1571 drives

You should follow these instructions if your drive has no parallel capabilities yet and you want to connect the cable directly onto the periphery chip in the drive. If possible, you shouldn't use this method because, this way, you won't be able to make use of it with a Commodore machine.


You need the following parts to build this cable:

  • One solderable 25-pin male plug (PC parallel plug)
  • A shielded or unshielded 8-wire cable of, preferably at most, 2 meters

Step 1. Solder one end of the cable right onto the CIA periphery chip inside the drive.

Step 2. Solder the other end of the cable onto the parallel plug. You should have the following connections:

CIA Parallel plug
 10, PB0   2, Data 0
 11, PB1   3, Data 1
 12, PB2   4, Data 2
 13, PB3   5, Data 3
 14, PB4   6, Data 4
 15, PB5   7, Data 5
 16, PB6   8, Data 6
 17, PB7   9, Data 7
not connected  18-25, GND

Circuit diagram:

[XP1571 parallel cable]

You can find the description of all parts used on the diagrams at the legend page.

Source: The Joe Forster-STA homepage