Presario 4122 System Board
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 |
× 1.5 |
A2-A3 |
× 2.0 | |
A2-A3 |
× 2.5 | |
A1-A2 |
× 3.0 | |
| P11 CMOS Clear |
1-2* |
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 |
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| 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 |