Parallel Port - IBM PS/2 65 SX Hardware Maintenance Reference

1.2.7 Parallel Port

The parallel port allows the attachment of devices that accept eight bits
of parallel data at standard transistor-transistor-logic (TTL) levels.
|The port has a 25-pin, D-shell connector and is designed primarily for
|printers. However, the port can be used as an input/output port for any
|device or application that matches the input/output capabilities of the
|port. When adapters with additional parallel ports are installed, the
|system can support three different devices, each addressed separately as
|PARALLEL 1, PARALLEL 2, or PARALLEL 3.
Note: Conflicts occur when two or more devices have the same address.
Select the Set configuration option on the Reference Diskette.
Select View configuration to verify that no lines are addressed the
same.
IBM PS/2 Model 65 SX HMR
Parallel Port
1.2.7 - 1