Presario 4112 System Board

4112sbjumpers.JPG (21731 bytes)

Configuration Jumpers

Jumper

Pins

Function
P7

   

Replacement Battery Connector
P8
Bus Speed Select

1-2

50 MHz CPU External Bus Frequency

2-3

60 MHz CPU External Bus Frequency

3-4

66 MHz CPU External Bus Frequency

4-5

55 MHz CPU External Bus Frequency (Reserved)
P9 CPU Clock

A1-A2
B1-B2

× 1.5

A2-A3
B1-B2

× 2.0

A2-A3
B2-B3

× 2.5

A1-A2
B2-B3

× 3.0
P11 CMOS Clear

1-2*
Open

Secure CMOS Power
Remove jumper for 10 seconds and reinstall to
clear CMOS
*Default

 

External Connectors

Function Description Designator
Keyboard Miniature 6-Pin 1/2 J6
Mouse Miniature 6-Pin 1/2 J6
Joystick/MIDI DSUB 15-Pin 2 Row J14
Video 15-Pin Header J25
Parallel DSUB 25-Pin J18
USB Port USB Connector J11
Line In Mini Stereo 1/2 J5
Line Out Mini Stereo 1/2 J2
Microphone Mini Stereo 1/2 J5
Speaker Out Mini Stereo 1/2 J5

 

Internal Connectors

Function Description Designator
SIMM Sockets 72-Pin SIMM J22, J23, J24, J26
Cache Socket 160-Pin DIMM J13
Serial 10-Pin Header J8
MPEG 10-Pin Header J20
LPB/MPEG  34-Pin Header J17
Replacement Battery 4-Pin Header P7
Clock Speed 5-Pin Header P8
Clock Multiplier 6-Pin Header P9
CMOS 2-Pin Header P11
VESA Feature Connector 26-Pin Header J27
Riser PCI/ISA Connector J15
MPEG Audio 4-Pin Audio P3
CD-ROM Audio  4-Pin Audio P5
TV Audio 4-Pin Audio P6
IDE Drives 40 Pin Header J1, J3
Diskette Drive 34-Pin Header J4
Button/LED Board 20-Pin Header J9
Power Supply 12-Pin ATPWR Header P1
Wavetable Connector 26-Pin Header J7
Video Memory Expansion 30-Pin Header J16, J19