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Presario 2255 System Board
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2255 System Board: Core Voltage |
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| 233 MHz | 266 MHz | 300 Mhz | |
| JP1 |
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| 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 | |
| Function | Description | Reference Designator |
| Miniature 6-pin | ½ J4 | |
| Mouse | Miniature 6-pin | ½ J4 |
| Parallel port | DSUB 25-pin | J5 |
| Serial | DSUB 15-pin | J6 |
| USB | USB connector | J7 |
| Video | 15-pin VGA | J8 |
| Game | DSUB 15-pin | J9 (Combined stacked connector) |
| Microphone in | Mini stereo | J3 (Combined stacked connector) |
| Speaker out | Mini stereo | J1 (Combined stacked connector) |
| Line out | Mini stereo | J2 (Combined stacked connector) |
| 168-pin DIMM | DM1 | |
| SODIMM socket | 144-pin SODIMM | DM2 |
| PCI slot | 32-bit PCI connector | J17 |
| ISA slots | 16-bit ISA connector | J10, J11 (combo), J12 |
| CPU core voltage select | 6-pin header | JP3 & JP4 |
| Socket 7 | 321-pin PGA | U43 |
| Socket 7 clock multiplier | 6-pin header | JP1 |
| Battery voltage to SMC932 | 3-pin header | JP2 |
| Battery holder | BT1 | |
| CD-ROM audio | 4-pin header, key 2 | J15 |
| IDE drives | 40-pin headers, key 20 | J14 (primary), J16 (secondary) |
| Diskette drive | 34-pin header | J13 |
| Headphone board | 5-pin 2mm connector | J24 |
| Internal speakers | 2-pin header | J23 (L), J22 (R) |
| Second fan | 4-pin header, key 2 | J21 |
| Reset (NA) | 2-pin header | J19 |
| Button board | 5-pin header | J25 |
| Power supply | 12-pin ATPWR header j18 |
