Interrupt Assignments; Table 1-2. Jumper Descriptions; Table 1-3. Interrupt Assignments - Dell PowerEdge 4200 Service Manual

1-22 Dell PowerEdge 4200 Systems Service Manual

Table 1-2. Jumper Descriptions

Jumper Description
EISA Clear EISA Configuration
VGA Integrated video controller
PASSWD Password enable/disable
CRDBIOS Reserved
RSRVD2 Reserved
RSRVD1
333MHZ Microprocessor speed
300MHZ Microprocessor speed
266MHZ Microprocessor speed
233MHZ Microprocessor speed

Interrupt Assignments

Table 1-3. Interrupt Assignments

IRQ Line
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
Default Setting
Not installed (utility settings are
retained at system boot)
Installed (controller is enabled)
Installed (password feature is
enabled)
Not installed (reserved; do not
change)
Not installed (reserved; do not
change)
Installed only if the micro-
processor's internal speed is
333 MHz (when supported)
Installed only if the micro-
processor's internal speed is
300 MHz
Installed only if the micro-
processor's internal speed is
266 MHz
Installed only if the micro-
processor's internal speed is
233 MHz
Used/Available