The XH1571 hybrid cable

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.

Construction

You need the following parts to build this cable:

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

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

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

The cathodes 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:

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.

Source: The Joe Forster-STA homepage

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