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