Intel MB893 user manual Interrupt Request Lines IRQ, Level Function

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APPENDIX

B. Interrupt Request Lines (IRQ)

Peripheral devices use interrupt request lines to notify CPU for the service required. The following table shows the IRQ used by the devices on board.

Level	Function
IRQ0	System Timer Output
IRQ1	Keyboard
IRQ2	Interrupt Cascade
IRQ3	Serial Port #2
IRQ4	Serial Port #1
IRQ5	Reserved
IRQ6	Floppy Disk Controller
IRQ7	Parallel Port #1
IRQ8	Real Time Clock
IRQ9	Reserved
IRQ10	Reserved
IRQ11	Reserved
IRQ12	PS/2 Mouse
IRQ13	80287
IRQ14	Primary IDE
IRQ15	Secondary IDE

56	MB893 User’s Manual

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Contents USER’S Manual VersionAcknowledgments Table of Contents MB893 Server Motherboard Checklist IntroductionProduct Description Specifications IDEBoard Dimensions Installations Installing the CPU ATX Power Installation Installing the MemorySetting the Jumpers Jumper Locations on MB893 JP3 Clear Cmos Contents JP4 CN7 & CN10 LAN By-pass Function SettingJP5 COM2 J6 Tx/Rx Signal Setting Reserved JP2 Compact Flash Master/Slave SelectJP7 Connectors on MB893 Connector Locations on MB893 ATX1 ATX Power Supply Connector ATX12V1 ATX 12V Power ConnectorSYSFAN1 System Fan Power Connector CN1 Front Side Bridge Board to ID370CN8, CN9 Sata Connector CN11 Dual Port USB ConnectorCN4 Mini PCI Socket CN12 COM1 Connector J3 USB ConnectorJ4 Parallel Port Connector Reserved J5, J6 COM2, COM3 ConnectorsJ8 PS/2 Keyboard & Mouse Connectors FDD1 Floppy Drive Connector Reserved IDE1 Primary IDE Connectors 40-pin 2.54mmIDE2 Primary IDE Connectors 44-pin 2.0mm Watchdog Timer Configuration Sample CodeCall LockChip ret EnableAndSetWatchdog Endp Mov dx, 2Eh mov al, 0Aah Out dx, al ret This page is intentionally left blank Bios Setup Bios Introduction Bios SetupPhoenix AwardBIOS Cmos Setup Utility Standard Cmos Setup DateTime IDE Primary HDDs / IDE Secondary HDDsDrive a / Drive B Video Halt OnAdvanced Bios Features Hard Disk Boot PriorityVirus Warning Quick Power On Self Test First/Second/Third Boot DeviceBoot Other Device Boot Up Floppy SeekBoot Up NumLock Status Typematic Rate SettingTypematic Delay Msec Apic ModeAgent After Boot OS Select for Dram 64MBConsole Redirection Baud RateAdvanced Chipset Features System Bios Cacheable System Memory FrequencyMemory Hole At 15M-16M On-Chip Frame Buffer Size MemoryIntegrated Peripherals IDEIDE HDD Block Mode IDE DMA Transfer AccessSata Mode OnChip Primary/Secondary PCI IDEPata IDE Mode Power on FunctionKB Power on Password Hot Key Power onUart Mode Select Onboard FDC ControllerOnboard Serial/Parallel Port Pwron After PWR-FailPower Management Setup Power ManagementAcpi Function Video Off MethodSuspend Mode HDD Power DownPower On by Ring Resume by AlarmReload Global Timer Events PNP/PCI Configurations CPU Warning Temperature Shutdown TemperatureTemperatures/Fan Speeds/Voltages PC Health Status1st Smart Fan II Temperature SYSFAN1 connector 2nd Smart Fan II Temperature CPUFAN1 / CPUFAN2Level2 Temperature Third phase Smart FAN functionalityFrequency/Voltage Control CPU Clock RatioAuto Detect PCI Clk Spread SpectrumLoad Fail-Safe Defaults Load Setup DefaultsSet Supervisor/User Password Save & Exit SetupDrivers Installation Intel 915G Chipset Software Intallation Utility Intel 915G Chipset Graphics Driver Marvell 88E8053 LAN Drivers Installation Intel PRO LAN Drivers Installation This page is intentionally left blank Appendix O Port Address MapInterrupt Request Lines IRQ Level Function