Specifications

90 007-4276-001
A: Technical Reference
Connectors Accessible to the User
This section describes the rear panel I/O ports.
Keyboard and Mouse Ports
These identical PS/2-compatible ports share a common housing. The top one is the
mouse and the bottom one is the keyboard. Table A-2 shows the cable pinout
assignments for the keyboard and mouse connectors.
Serial Ports
The baseboard provides two RS-232C serial ports (COM1 is to the left, COM2 is to the
right). They are D-subminiature 9-pin connectors. Each serial port can be enabled
separately with the configuration control provided on the baseboard.
AC distribution 1 Power cord Power supply cage 3-pin PVC double insulated
power cordage
AC power 1 AC
distribution
External interface Recommend 3-pin SJT power
cord
Table A-2 Keyboard and Mouse Connectors
Mouse Pin Signal Keyboard Pin Signal
1 MSEDAT (mouse data) 1 KEYDAT (keyboard data)
2 No connection 2 No connection
3 GND (ground) 3 GND (ground)
4 Fused VCC (+5 V) 4 Fused VCC (+5 V)
5 MSECLK (mouse clock) 5 KEYCLK (keyboard clock)
6 No connection 6 No connection
Table A-1 (continued) SGI 1450 server Cables and Connectors
Type Qty From To Interconnect Description