Table 1-2. Jumper Descriptions
Jumper | Description | Default Setting |
|
|
|
EISA | EISA Configuration Utility | Not installed (utility settings are |
|
| retained at system boot) |
VGA | Integrated video controller | Installed (controller is enabled) |
PASSWD | Password enable/disable | Installed (password feature |
|
| enabled) |
CRDBIOS | Reserved | Not installed (reserved; do not |
|
| change) |
RSRVD2 | Reserved | Not installed (reserved; do not |
RSRVD1 |
| change) |
200MHZ | Microprocessor speed | Installed only if the micro- |
|
| processor’s internal speed is |
|
| 200 MHz |
180MHZ | Microprocessor speed | Installed only if the micro- |
|
| processor’s internal speed is |
|
| 180 MHz |
|
|
|
Interrupt Assignments
| Table |
|
|
IRQ Line | Used/Available |
|
|
IRQ0 | Generated by system timer |
IRQ1 | Generated by keyboard controller to indicate that keyboard’s |
| output 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 drive |
| requires service |
IRQ7 | Generated by super I/O controller to indicate that device con- |
| nected to parallel port requires service |
IRQ8 | Generated by keyboard controller for each tick of RTC |
IRQ9 | Available for use by expansion card |
|
|
