I/O Ports and Connectors B-5Figure B-5 illustrates the pin numbers for the mouseconnector, and Table B-4 lists and defines the pin assign-ments and interface signals for the mouse connector.Figure B-5. Pin Numbers for the MouseConnectorVideo ConnectorThe system uses a 15-pin high-density D-subminiatureconnector on the back panel for attaching a video graph-ics array (VGA)-compatible monitor to your computer.The video circuitry on the system board synchronizes thesignals that drive the red, green, and blue electron guns inthe monitor.NOTE: Installing a video card automatically disables thesystem’s built-in video subsystem.If you reconfigure your hardware, you may need pinnumber and signal information for the video connector.Figure B-6 illustrates the pin numbers for the videoconnector, and Table B-5 lists and defines the pin assign-ments and interface signals for the video connector.Figure B-6. Pin Numbers for the VideoConnectorTable B-4. Pin Assignments for the MouseConnectorPin Signal I/O Definition1 MFDATA I/O Mouse data2 NC N/A No connection3 GND N/A Signal ground4 FVcc N/A Fused supply voltage5 MFCLK I/O Mouse clock6 NC N/A No connectionShell N/A N/A Chassis ground531246shellTable B-5. Pin Assignments for the VideoConnectorPin Signal I/O Definition1 RED O Red video2 GREEN O Green video3 BLUE O Blue video4 NC N/A No connection5-8, 10 GND N/A Signal ground9 DDC N/A Vcc11 NC N/A No connection12 DDCdata outO Monitor detect data13 HSYNC O Horizontal synchroniza-tion14 VSYNC O Vertical synchronization15 DDCclock outO Monitor detect clockShell N/A N/A Chassis ground1 — 561011 — 15shell
