Table 1-2. Jumper Descriptions
|
| Default |
Jumper | Description | Setting |
|
|
|
PSWD | Password enable/disable. | Installed (password feature |
| Jumper installed, activates | enabled) |
| password feature. |
|
BIOS | Used for internal Dell | Not installed (reserved, do not |
| debug tool. | change) |
RSRVD4 | Reserved. | Not installed (reserved, do not |
RSRVD3 |
| change) |
RSRVD2 |
|
|
RSRVD1 |
|
|
200MHZ | Microprocessor speed. | Installed if the micro- |
|
| processor’s internal speed is |
|
| 200 MHz, or else not |
|
| installed |
180MHZ | Microprocessor speed. | Installed if the micro- |
|
| processor’s internal speed is |
|
| 180 MHz, or else not |
|
| installed |
|
|
|
Interrupt Assignments
| Table |
IRQ Line | Used By/Available |
|
|
IRQ0 | Generated by system timer. |
IRQ1 | Generated by keyboard controller to indicate that keyboard’s out- |
| put buffer is full. |
IRQ2 | Generated internally by interrupt controller to enable IRQ8 |
| through IRQ15. |
IRQ3 | Generated by super I/O controller to indicate that device con- |
and | nected to corresponding serial port requires service (IRQ3 for |
IRQ4 | COM2 or COM4; IRQ4 for COM1 or COM3). |
IRQ5 | Available for use by expansion card unless this IRQ line is used |
| by secondary parallel port. |
IRQ6 | Generated by super I/O controller to indicate that diskette or tape |
| drive requires service. |
IRQ7 | Generated by super I/O controller to indicate that device con- |
| nected to parallel port requires service. |
|
|