Presario 2256 System Board

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2256 System Board: Core Voltage
  233 MHz 266 MHz 300 Mhz
JP1
Pin 1 - 2  Off
Pin 3 - 4  Off
Pin 5 - 6  Off
Pin 1 - 2  On
Pin 3 - 4  Off
Pin 5 - 6  On
Pin 1 - 2  On
Pin 3 - 4  On
Pin 5 - 6  On
JP2 (For Clearing Cmos) Short 2&3
JP2 (Default Setting) Short 1&2
JP3 Short 5&6 (3.2 volts) All Open (2.2 volts)
JP4 All Open Short 3&4

 

2256 System Board: External Connectors
Function Description Designator
Microphone Mini-Jack ½ J3
Speaker Out/Headphone (amplified) Mini-Jack ½ J3
Line Out (non-amplified) Mini-Jack ½ J3
Joystick/MIDI DSUB 15-Pin, 2 Row J1
Mouse Miniature 6-Pin ½ J4
Keyboard Miniature 6-Pin ½ J4
USB Dual J7
Parallel DSUB 25-Pin J5
Serial DSUB 9-Pin J6
Video DSUB 15-Pin, 3 Row J8

 

2256 System Board: Internal Connectors
Function Description Designator
CD Audio 4-Pin Header JP1
Power Supply 12-Pin Header J18
DIMM Sockets 72-Pin DIMM DM1
L2 Pipeline Burst Cache 72-Pin DIMM DM2
Button/Light Board 8-Pin Header J20
CMOS 3-Pin Header J21
Right Speaker 2-Pin Shrouded Header J22
Primary IDE Drive (CD/Hard Drive) 40-Pin Header, Key 20 J14
Diskette Drive 34-Pin Header, Key 3 J13
CD Drive 34-Pin Header, Key 3 J16
Left Speaker 2-Pin Shrouded Header J23
Modem Connector 62-Pin Edge J19
Processor (modified) Socket 7 U43
Replacement Battery 4-Pin Header, Key 2 BT1