|   | 
  
    |  | Function | Description | Designator | 
  
    | 1 | Front I/O 
      Connector |  | J11 | 
  
    | 2 | Parallel Port 
      Connector |  | J21 | 
  
    | 3 | Primary IDE 
      Drive |  | J12 | 
  
    | 4 | Secondary IDE 
      Drive |  | J13 | 
  
    | 5 | Diskette 
      Drive |  | J14 | 
  
    | 6 | Fan 
      Connector | 4-Pin | J16 | 
  
    | 7 | Fan 
      Connector | 3-Pin | J20 | 
  
    | 8 | Button Board |  | J10 | 
  
    | 9 | CMOS 
      Jumper |  | JP1 | 
  
    | 10 | RTC Battery | Battery holder | BT1 | 
  
    | 13 | PCI 
    Slots | PCI 
      Connector | PCI 1 to 
    5 | 
  
    | 15 | AGP 
    Slot |  | AGP1 | 
  
    | 16 | Frequency Multiple Jumpers |  | JP2 | 
  
    | 17 | Socket 370 |  | J18 | 
  
    | 18 | Heatsink Fan Connector |  | J15 | 
  
    | 19 | ATX Power Supply Connector |  | J9 | 
  
    | 20 | DIMM | 168-pin DIMM | DIMM 1 to 3
 | 
  
    | 21 | Mouse | Mini 6-pin | J1 (Upper) | 
  
    | 22 | Keyboard | Mini 6-pin | J1 (Lower) | 
  
    | 23 | USB 
    (2) |  | J2 | 
  
    | 27 | Serial Port |  | J4 | 
  
    | 28 | 1394 Connector | 6-pin 1394 connector | J7 |