Motherboard connectors pinouts

• AT Backup Battery 
• AT LED/Keylock 
• Azalia Digital Header (ADH) Onboard digital audio connector found on some (ASUS?) motherboards supplied with Azalia CODEC
• External Infrared Transceiver connector used in Compaq PC
• IRDA There is no standard pinout, but some examples are listed.
• M755 Audio Ports and Game/MIDI Port M755 Audio Ports and Game/MIDI Port Extension Bracket
• Motherboard CPU Cooling fan connector 
• Motherboard PWM Fan Connector For 4-Wire Pulse Width Modulation (PWM) Controlled Fans
• PC Speaker connector 
• Toshiba DynaBook SS 3380 port replicator 
• Turbo LED connector 
• USB motherboard internal connector Used for card-edge bracket additinal USB ports and internal cardreaders. This is very old and does not match most modern mother board usb headers.
• Via motherboard vga connector VIA NAS 7800 mainboard VGA pin connector

• GeekPort The GeekPort is a connector available at Be´s BeBox computers. This is a dream for all hobby engineers who like to connect the computer to the coffee machine.

• Dell Dimension 2350, 2400 internal USB & Speaker 20 Pin Front panel USB, Speaker (Optional MIC) Proprietary
• DELL Dimension 9200 Fan Fan for CPU or HD
• Dell GX270 SER2 motherboard connector 
• Dell PowerEdge 2300 internal USB connector 10 pin one row special USB connector

• HP Compaq ProLiant ML310 G1 Case Fan Proprietary 5 pin Fan connector
• HP Compaq ProLiant ML310 G1 CPU Fan Proprietary 4 pin CPU Fan connector
• HP Compaq ProLiant ML310 G1 Second AUX Power Connector Proprietary 10 Pin PSU AUX Connector

• Amiga Video Expansion 
• Atari 5200,7800 Expansion 
• Atari Cartridge ports Atari 2600 , 5200, 7800 and others cartridge port connectors
• Atari Falcon030 DSP port 
• ATX Form Factor card The ATX Form Factor Card is used to upgrade AT motherboards to meet ATX standards and support PC97, PC98 specificatioin.
• C128 Expansion Bus Available at the Commodore 128
• C16/+4 Expansion Bus Available on Commodore C16, C116 and +4 computers
• C64 Cartridge Expansion 
• CDTV Diagnostic Slot 
• CDTV Expansion Slot 
• MSX Expansion 
• Spectravideo SVI318/328 Expansion Bus 50 pin MALE EDGE connector at the computer
• ZX Spectrum AY-3-8912 The AY38912 sound chip can be found on the Spectrum 128, +2 and +3 computers

• Sun Attachment Unit Interface (AUI) connector 
• SUN SROMBO Available on SUN SPARCengine motherboards. Seems to be for SUN internal factory tests/programming.
• SUN SROMBOlite Available on SUN SPARCengine motherboards. Seems to be for SUN internal factory tests/programming