Dell PowerEdge 2300 User's Guide - Page 118

The system uses a Personal System/2 (PS/2)-style keyboard and supports a PS/2compatible mouse. Cables from both devices attach to 6-pin, miniature Deutsche Industrie Norm (DIN) connectors on the back panel of your computer. The keyboard connector is on the left; the mouse connector is on the right. A PS/2-compatible mouse works identically to an industry-standard serial mouse or bus mouse except that it has its own dedicated connector, which frees up both serial ports and does not require an expansion card. Circuitry inside the mouse detects the movement of a small ball and relays the direction to the computer. Mouse driver software can give the mouse priority with the microprocessor by issuing IRQ12 whenever a new mouse movement is detected. The driver software also passes along the mouse data to the application program that is in control. If you reconfigure your hardware, you may need pin number and signal information for the keyboard connector. Figure B-4 illustrates the pin numbers for the keyboard connector, and Table B-3 lists and defines the pin assignments and interface signals for the keyboard connector. 3 shell 5 1 6 2 4 1 KBDATA I/O 2 NC N/A 3 GND N/A 4 FVcc N/A 5 KBCLK I/O 6 NC N/A Shell N/A N/A Keyboard data No connection Signal ground Fused supply voltage Keyboard clock No connection Chassis ground B-6 Dell PowerEdge 2300 Systems User's Guide