Compaq AlphaPC 164SX DIGITAL UNIX Dokumentacja

Compaq Computer CorporationAlphaPC 164SX MotherboardTechnical Reference ManualOrder Number: EC–R57EB–TERevision/Update Information: This is a revised

x• Chapter 1, Introduction, is an overview of the AlphaPC 164SX motherboard, including its components, features, and uses.• Chapter 2, System Configur

xi• Binary MultiplesThe abbreviations K, M, and G (kilo, mega, and giga) represent binary multiples and have the following values.For example:Addresse

xiiNoteNotes emphasize particularly important information.NumberingAll numbers are decimal or hexadecimal unless otherwise indicated. The prefix 0x in

xiiiSignal NamesAll signal names are printed in boldface type. Signal names that originate in an industry-standard specification, such as PCI or IDE,

xiv– An occurrence specified as UNPREDICTABLE may or may not hap-pen based on an arbitrary choice function. The choice function is subject to the sam

Introduction 1–1 1IntroductionThis chapter provides an overview of the AlphaPC 164SX motherboard, including its components, features, and uses. The mo

1–2 IntroductionSystem Components and FeaturesFigure 1–1 AlphaPC 164SX Functional Block DiagramAlpha 21164PC MicroprocessorDECchip 21174-CA Control, I

Introduction 1–3System Components and Features1.1.1 21174 Core Logic ChipThe Alpha 21164PC microprocessor is supported by the 21174 core logic chip, w

1–4 IntroductionSystem Components and Features1.1.3 L2 Bcache Subsystem OverviewThe AlphaPC 164SX board-level L2 backup cache (Bcache) is a 1MB, direc

Introduction 1–5Software Support1.1.6 Miscellaneous LogicThe AlphaPC 164SX contains the following miscellaneous components:• Operating system support

October 1998The information in this publication is subject to change without notice.COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR E

1–6 IntroductionHardware Design Support1.2.2 Alpha SRM Console FirmwareThe Alpha SRM Console firmware is required to install and boot DIGITAL UNIX on

System Configuration and Connectors 2–1 2System Configuration and ConnectorsThis chapter describes the AlphaPC 164SX configuration, board connectors a

2–2 System Configuration and ConnectorsFigure 2–1 AlphaPC 164SX Switch/Connector/Component LocationXU59Q8J1J2J3J4J5 J6J7 J8 J9J10J11J1321164PC U31J14J

System Configuration and Connectors 2–3Table 2–1 AlphaPC 164SX Switch/Connector/Component ListItem No. Description Item No. DescriptionXB1 RTC battery

2–4 System Configuration and ConnectorsAlphaPC 164SX Configuration Switches2.1 AlphaPC 164SX Configuration SwitchesThe AlphaPC 164SX motherboard has a

System Configuration and Connectors 2–5Bcache Size Switches (CF0 and CF1)2.3 Bcache Size Switches (CF0 and CF1)The Bcache size switches are located at

2–6 System Configuration and ConnectorsMini-Debugger (CF3)2.6 Mini-Debugger (CF3)The Alpha SROM Mini-Debugger is stored in the flash ROM and is enable

System Configuration and Connectors 2–7AlphaPC 164SX Connector PinoutsB15 Gnd B16 CLK B17 Gnd B18 REQ#B19 Vdd B20 AD[31] B21 AD[29] B22 GndB23 AD[27]

2–8 System Configuration and ConnectorsAlphaPC 164SX Connector Pinouts2.7.2 ISA Expansion Bus Connector PinoutsTable 2–3 shows the ISA expansion bus c

System Configuration and Connectors 2–9AlphaPC 164SX Connector Pinouts2.7.3 SDRAM DIMM Connector PinoutsTable 2–4 shows the SDRAM DIMM connector pinou

iii ContentsPreface1 Introduction1.1 System Components and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.1.1 21

2–10 System Configuration and ConnectorsAlphaPC 164SX Connector Pinouts2.7.4 EIDE Drive Bus Connector PinoutsTable 2–5 shows the EIDE drive bus connec

System Configuration and Connectors 2–11AlphaPC 164SX Connector Pinouts2.7.5 Diskette (Floppy) Drive Bus Connector PinoutsTable 2–6 shows the diskette

2–12 System Configuration and ConnectorsAlphaPC 164SX Connector Pinouts2.7.7 COM1/COM2 Serial Line Connector PinoutsTable 2–8 shows the COM1/COM2 seri

System Configuration and Connectors 2–13AlphaPC 164SX Connector Pinouts2.7.9 SROM Test Data Input Connector PinoutsTable 2–10 shows the SROM test data

2–14 System Configuration and ConnectorsAlphaPC 164SX Connector Pinouts2.7.12 Microprocessor Fan Power Connector PinoutsTable 2–13 shows the microproc

System Configuration and Connectors 2–15AlphaPC 164SX Connector PinoutsFigure 2–3 Multipurpose Connector Pinouts1The halt button is not used with the

Power and Environmental Requirements 3–1 3Power and Environmental RequirementsThis chapter describes the AlphaPC 164SX power and environmental require

3–2 Power and Environmental RequirementsEnvironmental Requirements3.2 Environmental RequirementsThe 21164PC microprocessor is cooled by a small fan bl

Power and Environmental Requirements 3–3Board Dimensions3.3.1 ATX Hole SpecificationFigure 3–1 shows the ATX hole specification for the AlphaPC 164SX.

iv2.7.7 COM1/COM2 Serial Line Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . 2-122.7.8 Keyboard/Mouse Connector Pinouts. . . . . .

3–4 Power and Environmental RequirementsBoard Dimensions3.3.2 ATX I/O Shield RequirementsFigure 3–2 shows the ATX I/O shield dimensions for the AlphaP

Functional Description 4–1 4Functional DescriptionThis chapter describes the functional operation of the AlphaPC 164SX. The descrip-tion introduces th

4–2 Functional DescriptionAlphaPC 164SX Bcache Interface4.1 AlphaPC 164SX Bcache InterfaceThe 21164PC microprocessor controls the board-level L2 backu

Functional Description 4–321174 Core Logic Chip4.2 21174 Core Logic ChipThe 21174 core logic chip provides a cost-competitive solution for designers u

4–4 Functional Description21174 Core Logic ChipThe 21174 chip provides the following functions:• Serves as the interface between the 21164PC microproc

Functional Description 4–521174 Core Logic Chip4.2.3 PCI DevicesThe AlphaPC 164SX uses the PCI bus as the main I/O bus for the majority of periph-eral

4–6 Functional DescriptionISA Bus DevicesThe bridge from the 21164PC system bus to the 64-bit PCI bus is provided by the 21174 chip. It generates the

Functional Description 4–7ISA Bus Devices4.3.1 Combination Controller ChipThe AlphaPC 164SX uses the Standard Microsystems Corporation FDC37C669 combi

4–8 Functional DescriptionISA Bus DevicesFigure 4–4 AlphaPC 164SX ISA Bus Devices4.3.2 ISA Expansion SlotsTwo ISA expansion slots are provided for plu

Functional Description 4–9Interrupts4.3.4 Flash ROM Address MapAfter reset, the flash ROM is set to location 0. The 21174 supports cache fills and unc

v5.3.2 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35.3.3 Removing the 21164PC Mic

4–10 Functional DescriptionInterruptsregister. Interrupts latched in the interrupt request register can be reset individually by writing a 1 to the bi

Functional Description 4–11Interrupts 1The # symbol indicates an active low signal.Table 4–3 ISA InterruptsInterrupt Number Interrupt SourceIRQ0 Inter

4–12 Functional DescriptionSystem Clocks4.5 System ClocksFigure 4–6 shows the AlphaPC 164SX clock generation and distribution scheme.The AlphaPC 164SX

Functional Description 4–13System ClocksFigure 4–6 AlphaPC 164SX System ClocksAt system reset, the clock synthesizer is programmed to provide a 400-MH

4–14 Functional DescriptionReset and InitializationThe 21164PC microprocessor produces the divided clock output signal sys_clk_out1 that drives the CY

Functional Description 4–15DC Power Distribution4.7 DC Power DistributionThe AlphaPC 164SX derives its system power from a user-supplied PC power sup-

4–16 Functional DescriptionSerial ROM and Debug Port Support4.8 Serial ROM and Debug Port SupportThough it is not needed for normal operation, there i

Upgrading the AlphaPC 164SX 5–1 5Upgrading the AlphaPC 164SXFor higher system speed or greater throughput, SDRAM memory can be upgraded by replacing D

5–2 Upgrading the AlphaPC 164SXUpgrading SDRAM Memory5.2 Upgrading SDRAM MemoryYou can upgrade memory in the AlphaPC 164SX by adding more DIMMs or rep

Upgrading the AlphaPC 164SX 5–3Increasing Microprocessor Speed3. Align the DIMM so that the notch in the DIMM matches the key in the socket. 4. Firmly

viFigures1–1 AlphaPC 164SX Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22–1 AlphaPC 164SX Switch/Connector/Co

5–4 Upgrading the AlphaPC 164SXIncreasing Microprocessor Speed5.3.3 Removing the 21164PC MicroprocessorRemove the microprocessor currently in place at

Upgrading the AlphaPC 164SX 5–5Increasing Microprocessor SpeedFigure 5–1 Fan/Heat-Sink Assemblya. Put the GRAFOIL thermal pad in place. The GRAFOIL pa

5–6 Upgrading the AlphaPC 164SXIncreasing Microprocessor Speedb. Attach the microprocessor heat sink. The heat-sink material is clear anodized, hot-wa

Support, Products, and Documentation A–1 ASupport, Products, and DocumentationA.1 Customer SupportThe Alpha OEM website provides the following informa

Supporting ProductsA–2 Support, Products, and DocumentationA.2 Supporting ProductsThis section lists sources for components and accessories that are n

Alpha ProductsSupport, Products, and Documentation A–3Antec, Inc.2859 Bayview DriveFremont, CA 94538Phone: 510-770-1200, ext. 313PN PP-253V (250 W)A.2

Alpha DocumentationA–4 Support, Products, and DocumentationDesign kits include full documentation and schematics. They do not include related hardware

Third–Party DocumentationSupport, Products, and Documentation A–5A.5 Third–Party DocumentationYou can order the following third-party documentation di

Index–1Index Numerics21164 microprocessor. See Microprocessor.21174 Core logic chip. See Core logic chip.37C669. See Combination controller.AAbbreviat

viiTables1–1 AlphaPC 164SX SDRAM Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . . 1-32–1 AlphaPC 164SX Switch/Connector/Component

Index–2EEnvironmental requirements, 3-2Extents and ranges, xiiFFDC37C669. See Combination controller.Flash ROMAlphaBIOS firmware, 1-5II/O shield dimen

Index–3Power supplydc ampere requirements, 3-1wattage requirements, 3-1Processor. See Microprocessor.PTE, 4-4RRanges and extents, xiiRAS, 4-4Reset, 4-

ix PrefaceOverviewThis manual describes the AlphaPC 164SX motherboard, a board for computing sys-tems based on the Alpha 21164PC microprocessor and th