Compaq 164SX user manual Interrupts and ISA Bus Addresses, ISA Interrupts

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6

Interrupts and ISA Bus Addresses

This section lists the system and I/O interrupt assignments. It also lists the physical AlphaPC 164SX I/O space assignments.

6.1 Interrupts

Table 6–1lists each AlphaPC 164SX ISA interrupt and its source.

Table 6–1 ISA Interrupts

(Sheet 1 of 2)

Interrupt Number

Interrupt Source

 

 

 

 

IRQ0

Internal timer 1

 

IRQ1

Keyboard

 

IRQ2

Interrupt from controller 2

 

IRQ3

COM2

 

IRQ4

COM1

 

IRQ5

Available

 

IRQ6

Diskette (floppy)

 

IRQ7

Parallel port

 

IRQ8#1

Reserved

 

IRQ9

Available

 

IRQ10

USB

 

IRQ11

Available

 

IRQ12

Mouse

 

Interrupts and ISA Bus Addresses 6–1

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Contents Digital Unix October Contents Troubleshooting Memory and Microprocessor ConfigurationInterrupts and ISA Bus Addresses Alpha SRM Console FirmwarePage Figures Tables Page Manual Conventions and Terminology About This ManualTerms The following terms are used in this manual Manual Conventions and TerminologyAlphaPC 164SX Features FeaturesAlphaPC 164SX Switch/Connector/Component Location XB1 AlphaPC 164SX Switch/Connector/Component ListPower Requirements Power RequirementsPower Supply DC Current Requirements Environmental RequirementsPhysical Parameters Physical ParametersAlphaPC 164SX Motherboard Environmental Requirements 2shows the ATX hole specification for the AlphaPC 164SX Physical Parameters ATX Hole SpecificationPhysical Parameters ATX I/O Shield Requirements 3shows the ATX I/O shield dimensions for the AlphaPC 164SXPage Fail-Safe Booter CF7 AlphaPC 164SX Switch ConfigurationMini-Debugger CF3 CPU Speed Selection CF64AlphaPC 164SX Configuration Switches Fail-Safe Booter CF7PCI Bus Connector Pinouts AlphaPC 164SX Connector Pinouts1shows the PCI bus connector pinouts PCI Bus Connector PinoutsREQ# PCI Bus Connector PinoutsISA Expansion Bus Connector Pinouts ISA Expansion Bus Connector Pinouts2shows the ISA expansion bus connector pinouts ISA Expansion Bus Connector Pinouts J22, J23Sdram Dimm Connector Pinouts Sdram Dimm Connector Pinouts3shows the Sdram Dimm connector pinouts Sdram Dimm Connector Pinouts J7 through J10Eide Drive Bus Connector Pinouts Eide Drive Bus Connector Pinouts4shows the Eide drive bus connector pinouts Eide Drive Bus Connector Pinouts J5, J6Parallel Bus Connector Pinouts Diskette Floppy Drive Bus Connector PinoutsDiskette Floppy Drive Bus Connector Pinouts 5shows the diskette floppy drive bus connector pinoutsKeyboard/Mouse Connector Pinouts COM1/COM2 Serial Line Connector PinoutsCOM1/COM2 Serial Line Connector Pinouts 7shows the COM1/COM2 serial line connector pinoutsInput Power Connector Pinouts Srom Test Data Input Connector PinoutsEnclosure Fan Power Connector Pinouts Srom Test Data Input Connector PinoutsSoft Power Connector Pinouts Microprocessor Fan Power Connector PinoutsMultipurpose Connector Pinouts Microprocessor Fan Power Connector PinoutsJ20 Multipurpose Connector PinoutsConfiguring Sdram Memory Memory and Microprocessor ConfigurationUpgrading Sdram Memory AlphaPC 164SX Sdram Memory ConfigurationsUpgrading Sdram Memory Increasing Microprocessor Speed Increasing Microprocessor SpeedPreparatory Information Required ToolsInstalling the 21164PC Microprocessor Fan/Heat-Sink Assembly 6Memory and Microprocessor Configuration Interrupts Interrupts and ISA Bus Addresses1lists each AlphaPC 164SX ISA interrupt and its source ISA InterruptsISA I/O Address Map ISA I/O Address Map2lists the AlphaPC 164SX ISA I/O space address mapping ISA I/O Address MapAlpha SRM Console Firmware Conventions Alpha SRM Console FirmwareFollowing conventions are used in this section Alpha SRM Console Firmware Conventions Basic Alpha SRM Console Command Descriptions Basic Alpha SRM Console Command DescriptionsNone ArcBoot 6Alpha SRM Console Firmware Boots the system from the default boot device Writes data to the specified address DepositData to be deposited Clears the first 512 bytes of physical Examine Displays the contents of the specified address12Alpha SRM Console Firmware Examines Fwupdate Sets or modifies the value of an environment variable SetEnvironment variable to be assigned a new value 16Alpha SRM Console Firmware Show Environment Variables for Alpha SRM Console Commands Environment Variables for Alpha SRM Console CommandsEnvironment Variable Descriptions Architecture-Required Environment Variables Off System-Defined Environment VariablesSet language Init AlphaBIOS Keys AlphaBIOS ConventionsWindows NT Workstation Press F2 to start the AlphaBIOS setup programAlphaBIOS Setup Screen AlphaBIOS Upgrade Options Screen Press Enter to continue the installationAlphaBIOS Warning Screen AlphaBIOS Upgrade SRM Console Screen Press F10 to continue the installationAlphaBIOS Upgrade Complete Screen 6shows an example of the AlphaBIOS Upgrade Complete screenInstalling the Digital Unix Operating System Installing the Digital Unix Operating SystemRequirements Page Troubleshooting Steps No Video TroubleshootingHardware Startup Post Codes Beep CodesBeep Codes Beep CodesPost Codes Fail-Safe Booter Fail-Safe BooterProceed to .4 and follow the procedures Battery Recycle/Disposal Information Battery Recycle/Disposal InformationPage Customer Support Support, Products, and DocumentationNews Press releases DescriptionSupporting Products Power SupplySupporting Products MemoryAssociated Documentation Associated DocumentationEnclosure Northwestern El Paso, TX Phone4Support, Products, and Documentation
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