104 Appendix
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Connectors
Externally accessible:
Serial 9-pin connector; 16550C-compatible
Parallel 25-hole connector (bidirectional)
Video 15-hole connector
Network Adapter RJ45 connector
PS/2 (keyboard and mouse) 6-pin mini-DIN connector
USB two front-panel and six back-panel
USB 2.0–compliant connectors
5.1 Audio five connectors for line-in, line-out, microphone, surround, and
center/LFE channel; one front panel connector for headphones
NOTE: Present only on computers with integrated
sound capabilities.
System board connectors:
Primary IDE channel 40-pin connector on PCI local bus
Secondary IDE channel 40-pin connector on PCI local bus
Serial ATA drive two 7-pin connectors
Floppy drive 34-pin connector
Telephony (ATAPI) 4-pin connector
CD Audio (ATAPI) 4-pin connector
Fan 3-pin connector
Controls and Lights
Power control push button
Power light green light on power button—blinking green in sleep states;
solid green for power-on states
Hard-drive access light green
Link integrity light (on integrated
network adapter)
green light for 10-Mb operation; orange light for
100-Mb operation
Diagnostic code lights four bicolor (amber and green) located on back panel
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