 Acer File Extensions |
Compaq Presario 400 Series
| Jumper | Function | Pins* | Function |
|---|---|---|---|
| P1 | Select Processor Speed | 1,2 2,3 | 25 or 50 Mhz 33 or 66 Mhz |
| P2 | Processor Upgrade Socket Select | 1,2 PQFP* 2,3 PGA* | Socket Not Used Socket Used |
| P3,P4 | Processor Select | 1,2 2,3 | 486SX (PQFP)** 486DX** 486DX2** 487SX*** Overdrive*** 486SX(PGA) |
| P5 | Processor Select | 1,2 2,3 3,4 | 486SX (PQFP)** 486DX** 486DX2** 487SX*** Overdrive*** 486SX(PGA) |
| P6 | Clear CMOS & Password | Remove & Replace Jumper | |
| P7 | Modem ROM Select (If P7 is Installed) | 1,2 2,3 | Internal Modem ROM External Modem ROM |
| J16 | Replacement Battery Connector | Use 4.5v Alkaline Computer Battery |
* The 486SX (PQFP) is soldered to the board (no socket). All other type PGA processors plug into the processor socket.
** ODPR.
*** ODP.