M440LX Server System Product Guide
161
Interrupts
The following table shows the logical interrupt mapping of interrupt
sources on the system board.
Interrupt
Description (active-low signals have an “_L” symbol following them)
INTR
Processor interrupt.
NMI
NMI from DISMIC to processor.
IRQ0/MIRQ0
System board interrupt request 0 connected to input 2 of the I/O Apic. (For proper
operation, the BIOS must set the IRQ0 enable bit in PIIX3 register 70h during
initialization.)
IRQ1
RTC.
IRQ3
Serial port A or B interrupt from 87307VUL device, user configurable.
IRQ4
Serial port A or B interrupt from 87307VUL device, user configurable.
IRQ5
Parallel port.
IRQ6
Floppy diskette.
IRQ7
Parallel port.
IRQ8_L
IRQ9
IRQ10
IRQ11
IRQ12
Keyboard/mouse interrupt from 87307VUL.
IRQ14
Compatibility IDE interrupt from primary IDE devices 0 and 1.
IRQ15
IDE_IRQ
Tide to IRQ14; hard wired from PIIX3.
The following signals will be rerouted to the above interrupts:
PCI_INTA_L
PCI Interrupt signal A from PIIX3. Wired to PCI-0 slot 1 INTA_L, PCI-0 slot 2 INTD_L,
PCI-0 slot 3 INTC_L, PCI-0 slot 4 INTB_L, PCI-1 slot 1 INTA_L, and PCI-1 slot 2
INTD_L.
PCI_INTB_L
PCI Interrupt signal B from PIIX3. Wired to PCI-0 slot 1 INTB_L, PCI-0 slot 2 INTA_L,
PCI-0 slot 3 INTD_L, PCI-0 slot 4 INTC_L, PCI-1 slot 1 INTB_L, and PCI-1 slot 2
INTA_L. This interrupt is also used by the SCSI controller.
PCI_INTC_L
PCI Interrupt signal C from PIIX3. Wired to PCI-0 slot 1 INTC_L, PCI-0 slot 2 INTB_L,
PCI-0 slot 3 INTA_L, PCI-0 slot 4 INTD_L, PCI-1 slot 1 INTC_L, and PCI-1 slot 2
INTB_L. This interrupt is also used by the Network controller.
PCI_INTD_L
PCI Interrupt signal D from PIIX3. Wired to PCI-0 slot 1 INTD_L, PCI-0 slot 2 INTC_L,
PCI-0 slot 3 INTB_L, PCI-0 slot 4 INTA_L, PCI-1 slot 1 INTD_L, PCI-1 slot 2 INTC_L.
SMI_L
System Management Interrupt. General-purpose error indicator from a control PAL that
provides an SMI_L from nontraditional error sources (PERR_L, SERR_L, and others).
Summary of Contents for MB440LX
Page 1: ...Intel MB440LX System Installation Guide...
Page 6: ...1 6 Your Chapter Title Goes Here...
Page 16: ...16 Contents...
Page 26: ...26 Chapter 1 Server Description OM05793 Figure 1 4 Security Padlocks...
Page 48: ...48 Chapter 2 Installing The System...
Page 78: ...78 Chapter 3 Configuring The System...
Page 114: ...114 Chapter 4 Working Inside Your System OM05791A 1 2 3 Figure 4 19 Lithium Back up Battery...
Page 116: ...116 Chapter 4 Working Inside Your System OM05268 Figure 4 20 Removing the Front Panel Board...
Page 118: ...118 Chapter 4 Working Inside Your System OM05278 Figure 4 21 Front Panel Fans...
Page 127: ...M440LX Server System Product Guide 127 OM05771 Figure 4 26 Removing the Power Share Backplane...
Page 132: ...132 Chapter 4 Working Inside Your System...
Page 137: ...M440FX Server System Product Guide 137 OM06470 1 2 Figure 5 2 Installing a Hard Disk Drive...
Page 200: ...200 Chapter 9 I O Ports and Connectors...
Page 224: ...224 Chapter 10 Solving Problems...