This document will explain the pinouts used for the IBM wrap plugs used for diagnostic purposes on a IBM PC or XT computer. There are two wraps plugs. One will plug into the parallel port, the other will plug into the serial port. 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 � Parallel Connector � � DB-25 Female With Male Pins � � � � � � Connect � � � � PIN 1 TO 13 � � PIN 2 TO 15 � � PIN 12 TO 14 � � PIN 16 TO 10 � � PIN 17 TO 11 � � � � � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 � Serial Connector � � DB-25 Male With Female Pins � � � � � � Connect � � � � PIN 2 TO 3 � � PIN 4 TO 5 � � PIN 6 TO 20 � � PIN 6 TO 8 � � � � � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸