Specifications

C
Interface Connectors
C.1 Introduction
This appendix provides information about the external connectors on the
applicationDEC 400xP system.
C.2 External System Connectors
This section lists all external computer connectors located at the rear of
the system cabinet. The system cabinet rear panel connectors are shown in
Figure 1–2. Refer to the figure key in Table 1–2. Each of the following external
connectors is described:
• Parallel printer connector, 25-pin D-subminiature female
• Serial port connectors, 9-pin D-subminiature male
• Keyboard and mouse connectors, 6-pin mini-DIN
C.2.1 Parallel Printer Connector
The parallel printer connector provides an interface to a printer or other
parallel devices. Table C–1 lists its pin assignments.
Note
The system logically assigns LPTx names to parallel ports in the
address order 378h and 278h. This occurs during each boot process.
Interface Connectors C–1