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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
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