Presario 4808 System Board Jumpers

48xxSystemBoardMMX.gif (25566 bytes)

Pentium MMX System Board: External Connectors

Function

Description

Designator

Speaker/Headphone Mini Stereo 1/2 J2
Audio Line Out Mini Stereo 1/2 J2
Microphone In Mini Stereo 1/2 J5
Audio Line In Mini Stereo 1/2 J5
Keyboard Miniature 6-Pin 1/2 J6
Mouse Miniature 6-Pin 1/2 J6
Serial Port DSUB 9-Pin 2 Row J8
USB Port USB Connector J11
Parallel Port DSUB 25-Pin J17
Video 15-Pin Header J24

 

Pentium MMX System Board: Internal Connectors

Function Description Designator
Feature Connector 26-Pin Header J25
CMOS 2-Pin Header P12
DIMM Sockets 168-Pin DIMM J21, J22
Bus Speed 3-Pin Header P9
Creativity Imaging Center 10-Pin Header J19
Video Memory Expansion 30-Pin Small Header J18, J23
Clock Multiplier 5-Pin Header P11
Riser Board PCI/ISA Slot J16
Cache Socket 160-Pin DIMM J13
Power Supply 12-Pin ATPWR Header J14
Button/Light Board 20-Pin Header J9
MIDI 9-Pin Header J8
CD Audio 4-Pin Header, Key 2 P6
Internal Microphone 4-Pin Header, Key 2 P5
Internal Speaker 4-Pin Header, Key 2 P3
Power Supply 12-Pin ATPWR Header P1
External Battery 4-Pin Header, Key 2 P2
Primary IDE Drive (Hard Drive) 40-Pin Header, Key 20 J1
Secondary IDE Drive (CD Drive) 40-Pin Header, Key 20 J3
Diskette Drive 34-Pin Header J4
              



Configuration Jumpers

Jumper Pins Function
P2   Replacement Battery Connector
P9 Bus Speed Select 1-2

2-3

60 MHz CPU External Bus Frequency

66 MHz CPU External Bus Frequency

P11 CPU Clock Multiplier A1-A2     B1-B2

A2-A3      B1-B2

A2-A3     B2-B3

A1-A2     B2-B3

x 3.5 (233 MHz only)

x 2.0

x 2.5

x 3.0

P12 CMOS Clear 1-2 *     Open Secure CMOS Power Remove jumper for 10 seconds and reinstall to clear CMOS
* Default