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        | Number | Function | Description | Reference
          Designator |  
        | 1 | Diskette
          Drive | 34-pin | FDD1 |  
        | 2 | Primary IDE
          Drive | 40-pin | IDE1 |  
        | 3 | Secondary IDE
          Drive | 40-pin | IDE2 |  
        | 4 | Front I/O
          Panel | 10-pin | USB2 |  
        | 5 | Button Board | 20-pin | J2 |  
        | 6 | N/A |  |  |  
        | 7 | Processor Bus Frequency
          Jumper | 4, 2-pin | JP12-15 |  
        | 8 | CMOS | 3-pin | JP3 |  
        | 9 | Battery
          Socket | Battery
          holder | BAT1 |  
        | 10-12,14 | PCI Slots | 32-bit PCI
          connector | PCI 1 to 4 |  
        | 13 | CD Audio | 4-pin | CD1 |  
        | 15 | Fan | 3-pin | Fan1 |  
        | 16 | N/A |  |  |  
        | 17 | Socket 7 | 321-pin PGA | U6 |  
        | 18 | Power Supply | 20-pin | CN1 |  
        | 19 | CPU Core
          Voltage Select | 5, 2-pin | JP7-11 |  
        | 20 | Clock
          Multiplier | 3, 2-pin | JP4-6 |  
        | 21-23 | DIMM Sockets | 168-pin DIMM | DIMM 1 to 3 |  
        | 24 | Mouse | Miniature
          6-pin | PS1 (1/2) |  
        | 25 | Keyboard | Miniature
          6-pin | PS1 (1/2) |  
        | 26 | Back USB | Dual 4-pin | USB1 |  
        | 27 | Serial Port | DSUB 9-pin | Con1 |  
        | 28 | Parallel Port | DSUB 25-pin | PJ1 |  
        | 29 | VGA Connector | DSUB 15-pin | VGA1 |  
        | 30 | Line Out | Mini Stereo | Game1D |  
        | 31 | Line In | Mini Stereo | Game1B |  
        | 32 | Microphone | Mini Stereo | Game1C |  
        | 33 | Game Port | DSUB 15-pin | Game1A |  |