Keyboard Connector
The keyboard connector is a 5-pin, circular-type DIN socket. It is used to
connect the system board keyboard interface to any standard AT-
compatible keyboard (84 or 101 -key type keyboards). The pin
assignments are listed below:
Pin
Description
1
Keyboard Clock Signal
2
Keyboard Data Signal
3
Not Used
4
Ground
5
+5V Fused VDC
Power LED and Keyboard Lock Connector
The Power LED and Keyboard Lock connector (KLOCK) is 5-pin keyed
BERG strip. It is used to c5 VDC power to the power indicator
LED at the front panel and connect security keyboard lock to the
keyboard controller. This allows you to switch off the keyboard and so
provide limited security against casual intruders. The pin assignments
are indicated below:
Pin
Description
1
LED Power
2
Key (No Connection)
3
Ground
4
Keyboard Lock
5
Ground
Page 14 486MIS System Board User's Manual
