The X1531 tape connector cable

Construction

You need the following parts to build this cable:

One solderable 15-pin male D-SUB plug (PC game port)
One solderable 25-pin male D-SUB plug (PC parallel plug)
One solderable 7-pin female mini-DIN connector (C= 1531 Datasette)
A length of 6-wire cable, approx. 50 cm
Some heat-shrink insulator material

Step 1. Use a sharp knife to strip off the insulation from about 2/3 of the length of the cable. Seperate the wires into two strands, 2 and 4 wires each. Use heat-shrink insulator material to insulator the two strands again, so in the end your cable represents an Y-Fork.

Step 2. Solder the 2 wires of the first strand to pins 1 (+5V) and 4 (GND) of the 15 pin plug.

Step 3. Solder the 4 wires of the second strand to the appropriate pins of the 25 pin plug.

Step 4. Solder the 6 wires on the other end of the cable to the 7-pin mini-DIN connector. Solder the two GND wires from the different plugs together, and add short lengths of wire to connect pins 1-7 and pins 2-5.


   mini-DIN plug    15 pin D-SUB plug    25 pin D-SUB plug

 1,7, GND  4, GND   18-25, GND

 2,3, +5 V  1, +5 V 

 4, Read            10, Ack

 5, Write           3, Data 1

 6, Sense           12, Paper End

mini-DIN plug	15 pin D-SUB plug	25 pin D-SUB plug
1,7, GND	4, GND	18-25, GND
2,3, +5 V	1, +5 V
4, Read		10, Ack
5, Write		3, Data 1
6, Sense		12, Paper End

Circuit diagram:

Assembled Device