Service manual

B-2 Sun Ultra 2 Series Service Manual • July 1996

FIGURE B-1 Keyboard/Mouse Connector Pin Configuration

B.1.2 Serial Port Connector A and B (RS-423/RS-232)

Serial port connectors A and B are DB-25 type connectors located on the

motherboard back panel. The following figure illustrates the serial port A and serial

port B connector configuration and the following table lists the serial A and B port

connector pin assignments.

TABLE B-1 Keyboard/Mouse Connector Pin Assignments

Pin Signal Name Description

1 Gnd Ground

2 Gnd Ground

3 +5 VDC +5 VDC

4 Mse-rxd Mouse receive data

5 Kbd-txd Keyboard out

6 Kbd-rxd Keyboard in

7 Kbd-pwk Keyboard power on

8 +5 VDC +5 VDC

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