You should follow these instructions if your drive has no parallel capabilities yet and you want to create a parallel port on your drive and then connect the cable to it. This is the preferred method because you can also make use of it with a Commodore machine.

Important notes

• On circuit diagrams, plugs are displayed as viewed from the back side, the solder side. Chips are displayed as viewed from above; also, see the small semicircular cut for finding the correct orientation. When in doubt, see the corresponding description on the legend page.

Construction

First, create the parallel port for 1541 drives or the parallel port for 1570 and 1571 drives.

You need the following parts to build this cable:

• One solderable 15-pin male plug (PC game plug)

• One solderable 25-pin male plug (PC parallel plug)

• Eight diodes (e.g. 1N4148)

• A shielded or unshielded 8-wire cable of, preferably, at most 2 meters

Step 1. Take the long cable and solder one end of it onto the game plug.

Step 2. Solder those wires, that don't go through a diode, on the other end of the long cable onto the parallel plug. These include the following connections:

  Game plug   
 Parallel plug 

       1       
   13, Select  

       2       
   12, PaperEnd

       3       
   10, Ack     

       4       
   11, Busy    

 not connected 
18-25, GND     

Step 3. Solder the remaining wires through a diode onto the parallel plug. These including the following connections:

  Game plug   
 Parallel plug 

       5       
    6, Data 4  

       6       
    7, Data 5  

       7       
    8, Data 6  

       8       
    9, Data 7  

The cathodes of the diodes should be pointing towards the pins in the right column of the table.

Step 4. Build the diode bridges between the appropriate pins of the parallel plug. These include the following connections:

 Parallel plug 
 Parallel plug 

   10, Ack     
    4, Data 2  

   11, Busy    
    5, Data 3  

   12, PaperEnd
    3, Data 1  

   13, Select  
    2, Data 0  

The cathodes should be pointing towards the pins in the right column of the table.

Circuit diagram

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

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