To make a parallel cable to use for PLIP, you will need two 25-pin
connectors (called DB-25) and a cable with at least eleven conductors.
The cable must not be any longer than 15 meters (50 feet). The cable may or may
not have a shield, but if you are building a long cable, it is probably
a good idea to have one.
If you look at the connector, you should be able to read tiny numbers
at the base of each pin—from 1 for the pin at the top left (if you hold
the broader side up) to 25 for the pin at the bottom right. For the null
printer cable, you have to connect the following pins of both connectors
with each other, as shown in Figure B-1.
All remaining pins remain unconnected. If the cable is shielded, the
shield should be connected to the DB-25's metallic shell on just
one end.
