Interrupts and ISA Bus Addresses, ISA Interrupts

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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Compaq Interrupts and ISA Bus Addresses, 1lists each AlphaPC 164SX ISA interrupt and its source, ISA Interrupts

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 Manual Terms The following terms are used in this manual Manual Conventions and Terminology AlphaPC 164SX Features Features AlphaPC 164SX Switch/Connector/Component Location XB1 AlphaPC 164SX Switch/Connector/Component List Power Requirements Power RequirementsPower Supply DC Current Requirements Environmental Requirements Physical Parameters Physical ParametersAlphaPC 164SX Motherboard Environmental Requirements 2shows the ATX hole specification for the AlphaPC 164SX Physical Parameters ATX Hole Specification Physical 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 CF64 AlphaPC 164SX Configuration Switches Fail-Safe Booter CF7 PCI Bus Connector Pinouts AlphaPC 164SX Connector Pinouts1shows the PCI bus connector pinouts PCI Bus Connector Pinouts REQ# PCI Bus Connector Pinouts ISA Expansion Bus Connector Pinouts ISA Expansion Bus Connector Pinouts2shows the ISA expansion bus connector pinouts ISA Expansion Bus Connector Pinouts J22, J23 Sdram Dimm Connector Pinouts Sdram Dimm Connector Pinouts3shows the Sdram Dimm connector pinouts Sdram Dimm Connector Pinouts J7 through J10 Eide Drive Bus Connector Pinouts Eide Drive Bus Connector Pinouts4shows the Eide drive bus connector pinouts Eide Drive Bus Connector Pinouts J5, J6 Parallel Bus Connector Pinouts Diskette Floppy Drive Bus Connector PinoutsDiskette Floppy Drive Bus Connector Pinouts 5shows the diskette floppy drive bus connector pinouts Keyboard/Mouse Connector Pinouts COM1/COM2 Serial Line Connector PinoutsCOM1/COM2 Serial Line Connector Pinouts 7shows the COM1/COM2 serial line connector pinouts Input Power Connector Pinouts Srom Test Data Input Connector PinoutsEnclosure Fan Power Connector Pinouts Srom Test Data Input Connector Pinouts Soft Power Connector Pinouts Microprocessor Fan Power Connector PinoutsMultipurpose Connector Pinouts Microprocessor Fan Power Connector Pinouts J20 Multipurpose Connector Pinouts Configuring Sdram Memory Memory and Microprocessor Configuration Upgrading Sdram Memory AlphaPC 164SX Sdram Memory ConfigurationsUpgrading Sdram Memory Increasing Microprocessor Speed Increasing Microprocessor SpeedPreparatory Information Required Tools Installing 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 Interrupts ISA I/O Address Map ISA I/O Address Map2lists the AlphaPC 164SX ISA I/O space address mapping ISA I/O Address Map Alpha 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 Descriptions None Arc Boot 6Alpha SRM Console Firmware Boots the system from the default boot device Writes data to the specified address Deposit Data to be deposited Clears the first 512 bytes of physical Examine Displays the contents of the specified address 12Alpha 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 Variables Set language Init AlphaBIOS Keys AlphaBIOS Conventions Windows NT Workstation Press F2 to start the AlphaBIOS setup program AlphaBIOS Setup Screen AlphaBIOS Upgrade Options Screen Press Enter to continue the installation AlphaBIOS Warning Screen AlphaBIOS Upgrade SRM Console Screen Press F10 to continue the installation AlphaBIOS Upgrade Complete Screen 6shows an example of the AlphaBIOS Upgrade Complete screen Installing the Digital Unix Operating System Installing the Digital Unix Operating SystemRequirements Page Troubleshooting Steps No Video TroubleshootingHardware Startup Post Codes Beep CodesBeep Codes Beep Codes Post 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 Description Supporting Products Power SupplySupporting Products Memory Associated Documentation Associated DocumentationEnclosure Northwestern El Paso, TX Phone 4Support, Products, and Documentation

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

Models: 164SX

Interrupts and ISA Bus Addresses

6.1 Interrupts

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

Table 6–1 ISA Interrupts