Compaq AlphaPC 164LX Spezifikationen

Compaq Computer CorporationAlphaPC 164LX MotherboardTechnical Reference ManualOrder Number: EC–R46WC–TERevision/Update Information:This is a revised d

x9 March 1999 – Subject To Change• Chapter 1, Introduction, is an overview of the AlphaPC 164LX motherboard, including its components, features, and u

A–34 System Address Space9 March 1999 – Subject To ChangePCI to Physical Memory AddressThe window base address must be on a naturally aligned boundary

9 March 1999 – Subject To ChangeSystem Address Space A–35PCI to Physical Memory AddressFigure A–17 PCI DMA Addressing ExampleFigure A–18 shows the PCI

A–36 System Address Space9 March 1999 – Subject To ChangePCI to Physical Memory AddressFigure A–18 PCI Target Window CompareZeroDetectHit (Window 3 On

9 March 1999 – Subject To ChangeSystem Address Space A–37Direct-Mapped AddressingA.13 Direct-Mapped AddressingThe target address is translated by dire

A–38 System Address Space9 March 1999 – Subject To ChangeScatter-Gather AddressingA.14 Scatter-Gather AddressingIf the Wx_BASE_SG bit of the PCI base

9 March 1999 – Subject To ChangeSystem Address Space A–39Scatter-Gather AddressingEach scatter-gather map page table entry (PTE) is a quadword and has

A–40 System Address Space9 March 1999 – Subject To ChangeScatter-Gather TLBA.15 Scatter-Gather TLBAn eight-entry translation lookaside buffer (TLB) is

9 March 1999 – Subject To ChangeSystem Address Space A–41Scatter-Gather TLBFigure A–20 Scatter-Gather Associative TLBEach time an incoming PCI address

A–42 System Address Space9 March 1999 – Subject To ChangeScatter-Gather TLBmapping. Both paths are indicated — the right side shows the path for a TLB

9 March 1999 – Subject To ChangeSystem Address Space A–43Scatter-Gather TLBFigure A–21 Scatter-Gather Map Translation33n-11OffsetOffset0300000Scatter-

9 March 1999 – Subject To Changexi• Binary MultiplesThe abbreviations K, M, and G (kilo, mega, and giga) represent binary multiples and have the follo

A–44 System Address Space9 March 1999 – Subject To ChangeSuggested Use of a PCI WindowA.16 Suggested Use of a PCI WindowFigure A–22 shows the PCI wind

9 March 1999 – Subject To ChangeSystem Address Space A–45Suggested Use of a PCI WindowTable A–15 lists the PCI window power-up configuration character

A–46 System Address Space9 March 1999 – Subject To ChangeSuggested Use of a PCI WindowThis mem_cs_l range in Figure A–23 is subdivided into several po

9 March 1999 – Subject To ChangeSystem Address Space A–47Suggested Use of a PCI WindowAs shown in Figure A–24, PCI window 0 in the 21174 can be enable

9 March 1999 – Subject to ChangeSupport B–1 BSupportB.1 Customer SupportThe Alpha OEM website provides the following information for customer support.

B–2 Support9 March 1999 – Subject To ChangeSupporting ProductsB.2 Supporting ProductsThis section contains information about sources for components an

9 March 1999 – Subject To ChangeSupport B–3Alpha ProductsAntec, Inc.2859 Bayview DriveFremont, CA 94538Phone: 510–770–1200, ext. 313Contact: Han LiuPN

B–4 Support9 March 1999 – Subject To ChangeAlpha DocumentationDesign kits include full documentation and schematics. They do not include related hardw

9 March 1999 – Subject To ChangeSupport B–5Third–Party DocumentationB.5 Third–Party DocumentationYou can order the following third-party documentation

xii9 March 1999 – Subject To ChangeData UnitsThe following data-unit terminology is used throughout this manual.NoteNotes emphasize particularly impor

9 March 1999 – Subject to ChangeIndex–1Index Numerics21164 microprocessor. See Microprocessor.21174 Core logic chip. See Core logic chip.21174-CA. See

Index–29 March 1999 – Subject to ChangeDebug monitorsystem support, 1–5Design support, 1–6Dimensionsmotherboard, 3–2Direct mapping, 4–4Diskette contro

9 March 1999 – Subject to ChangeIndex–3NNumbering convention, xiiOOperating systemssoftware support, 1–5Ordering products and documentation, B–3PPacka

Index–49 March 1999 – Subject to ChangeUNIX. See Tru64 UNIX.UNPREDICTABLEdefinition, xiiiUpgradingmemory, 5–2microprocessor, 5–3Utility bus. See Ubus.

9 March 1999 – Subject To ChangexiiiSignal NamesAll signal names are printed in boldface type. Signal names that originate in an industry-standard spe

xiv9 March 1999 – Subject To Change– An occurrence specified as UNPREDICTABLE may or may not hap-pen based on an arbitrary choice function. The choic

9 March 1999 – Subject To ChangeIntroduction 1–1 1IntroductionThis chapter provides an overview of the AlphaPC 164LX motherboard, including its compon

1–2 Introduction9 March 1999 – Subject To ChangeSystem Components and FeaturesFigure 1–1 AlphaPC 164LX Functional Block DiagramAlpha 21164Microprocess

9 March 1999 – Subject To ChangeIntroduction 1–3System Components and Features1.1.1 21174 Core Logic ChipThe Alpha 21164 microprocessor is supported b

1–4 Introduction9 March 1999 – Subject To ChangeSystem Components and Features1.1.3 L3 Bcache Subsystem OverviewThe AlphaPC 164LX board-level L3 backu

9 March 1999 – Subject To ChangeIntroduction 1–5Software Support– The 21174 core logic chip provides the SDRAM and PCI clocks.– A 14.318-MHz crystal a

March 1999The information in this publication is subject to change without notice.COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR EDI

1–6 Introduction9 March 1999 – Subject To ChangeHardware Design Support1.2.3 Motherboard Software Developer’s Kit (SDK)The SDK is designed to provide

9 March 1999 – Subject To ChangeSystem Configuration and Connectors 2–1 2System Configuration and ConnectorsThis chapter describes the AlphaPC 164LX c

2–2 System Configuration and Connectors9 March 1999 – Subject To ChangeFigure 2–1 AlphaPC 164LX Jumper/Connector/Component LocationU42U62U61U49U50U48U

9 March 1999 – Subject To ChangeSystem Configuration and Connectors 2–3Table 2–1 AlphaPC 164LX Jumper/Connector/Component ListItem No. Description Ite

2–4 System Configuration and Connectors9 March 1999 – Subject To ChangeAlphaPC 164LX Configuration Jumpers2.1 AlphaPC 164LX Configuration JumpersThe A

9 March 1999 – Subject To ChangeSystem Configuration and Connectors 2–5CPU Speed Selection2.2 CPU Speed SelectionThe clock synthesizer at location U47

2–6 System Configuration and Connectors9 March 1999 – Subject To ChangeFlash ROM Update Jumper (J28)2.6 Flash ROM Update Jumper (J28)When J28–2/3 are

9 March 1999 – Subject To ChangeSystem Configuration and Connectors 2–7AlphaPC 164LX Connector PinoutsB27 AD<23> B28 Gnd B29 AD<21> B30 A

2–8 System Configuration and Connectors9 March 1999 – Subject To ChangeAlphaPC 164LX Connector Pinouts2.7.2 ISA Expansion Bus Connector PinoutsTable 2

9 March 1999 – Subject To ChangeSystem Configuration and Connectors 2–9AlphaPC 164LX Connector Pinouts2.7.3 SDRAM DIMM Connector PinoutsTable 2–4 show

9 March 1999 – Subject to Changeiii ContentsPreface1 Introduction1.1 System Components and Features . . . . . . . . . . . . . . . . . . . . . . . . .

2–10 System Configuration and Connectors9 March 1999 – Subject To ChangeAlphaPC 164LX Connector Pinouts2.7.4 EIDE Drive Bus Connector PinoutsTable 2–5

9 March 1999 – Subject To ChangeSystem Configuration and Connectors 2–11AlphaPC 164LX Connector Pinouts2.7.5 Diskette Drive Bus Connector PinoutsTable

2–12 System Configuration and Connectors9 March 1999 – Subject To ChangeAlphaPC 164LX Connector Pinouts2.7.7 COM1/COM2 Serial Line Connector PinoutsTa

9 March 1999 – Subject To ChangeSystem Configuration and Connectors 2–13AlphaPC 164LX Connector Pinouts2.7.9 SROM Test Data Input Connector PinoutsTab

2–14 System Configuration and Connectors9 March 1999 – Subject To ChangeAlphaPC 164LX Connector Pinouts2.7.12 Speaker Connector PinoutsTable 2–13 show

9 March 1999 – Subject To ChangeSystem Configuration and Connectors 2–15AlphaPC 164LX Connector Pinouts2.7.15 IDE Drive LED Connector PinoutsTable 2–1

9 March 1999 – Subject To ChangePower and Environmental Requirements 3–1 3Power and Environmental RequirementsThis chapter describes the AlphaPC 164LX

3–2 Power and Environmental Requirements9 March 1999 – Subject To ChangeEnvironmental Requirements3.2 Environmental RequirementsThe 21164 microprocess

9 March 1999 – Subject To ChangePower and Environmental Requirements 3–3Board Dimensions3.3.1 ATX Hole SpecificationFigure 3–1 shows the ATX hole spec

iv9 March 1999 – Subject to Change2.7.7 COM1/COM2 Serial Line Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . 2–122.7.8 Keyboard/Mo

3–4 Power and Environmental Requirements9 March 1999 – Subject To ChangeBoard Dimensions3.3.2 ATX I/O Shield RequirementsFigure 3–2 shows the ATX I/O

9 March 1999 – Subject To ChangeFunctional Description 4–1 4Functional DescriptionThis chapter describes the functional operation of the AlphaPC 164LX

4–2 Functional Description9 March 1999 – Subject To ChangeAlphaPC 164LX Bcache Interface4.1 AlphaPC 164LX Bcache InterfaceThe 21164 microprocessor con

9 March 1999 – Subject To ChangeFunctional Description 4–321174 Core Logic Chip4.2 21174 Core Logic ChipThe 21174 core logic chip provides a cost-comp

4–4 Functional Description9 March 1999 – Subject To Change21174 Core Logic Chip4.2.1 21174 Chip OverviewThe 21174 application-specific integrated circ

9 March 1999 – Subject To ChangeFunctional Description 4–521174 Core Logic ChipThe AlphaPC 164LX supports a maximum of 512MB of main memory. The memor

4–6 Functional Description9 March 1999 – Subject To Change21174 Core Logic Chipthe configuration and operating frequencies, the PCI bus supports up to

9 March 1999 – Subject To ChangeFunctional Description 4–7ISA Bus Devices4.2.5 PCI Expansion SlotsFour dedicated PCI expansion slots are provided on t

4–8 Functional Description9 March 1999 – Subject To ChangeISA Bus Devices• Keyboard/mouse–An 8042-compatible interface is brought out to separate 6-pi

9 March 1999 – Subject To ChangeFunctional Description 4–9ISA Bus Devices4.3.2 Utility Bus Memory DeviceThe AlphaPC 164LX Ubus drives a flash ROM memo

9 March 1999 – Subject to Changev5 Upgrading the AlphaPC 164LX5.1 Configuring SDRAM Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–10 Functional Description9 March 1999 – Subject To ChangeInterrupts4.3.5 Flash ROM Address MapThe address range for the flash ROM is FFF8.0000–FFFF.

9 March 1999 – Subject To ChangeFunctional Description 4–11InterruptsFigure 4–5 Interrupt LogicPCI Bus21164pc164lx.2req_reset_lISAPCI-to-ISABridgeComb

4–12 Functional Description9 March 1999 – Subject To ChangeInterruptsTable 4–2 AlphaPC 164LX System Interrupts21164 Interrupt IPL11IPL = interrupt pri

9 March 1999 – Subject To ChangeFunctional Description 4–13Interrupts4.4.1 Interrupt PLD FunctionThe MACH210A PLD is an 8-bit I/O slave on the ISA bus

4–14 Functional Description9 March 1999 – Subject To ChangeSystem ClocksFigure 4–6 Interrupt/Interrupt Mask Registers4.5 System ClocksFigure 4–7 shows

9 March 1999 – Subject To ChangeFunctional Description 4–15System Clocks• Miscellaneous clocks — The miscellaneous clocks include those needed for ISA

4–16 Functional Description9 March 1999 – Subject To ChangeReset and InitializationAt system reset, the 21164 microprocessor’s irq_h<3:0> pins a

9 March 1999 – Subject To ChangeFunctional Description 4–17Serial ROMFigure 4–8 System Reset and Initialization4.7 Serial ROMThe serial ROM code is co

4–18 Functional Description9 March 1999 – Subject To ChangeDC Power Distributionmicroprocessor and SROM (such as the clock). Connector J29 supports an

9 March 1999 – Subject To ChangeFunctional Description 4–19DC Power DistributionVdd (+5.0 V) is supplied to ISA connectors, PCI32 connectors, and most

vi9 March 1999 – Subject to ChangeB.2.2 Thermal Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–

9 March 1999 – Subject To ChangeUpgrading the AlphaPC 164LX 5–1 5Upgrading the AlphaPC 164LXFor higher system speed or greater throughput, you can upg

5–2 Upgrading the AlphaPC 164LX9 March 1999 – Subject To ChangeUpgrading SDRAM Memory5.2 Upgrading SDRAM MemoryYou can upgrade memory in the AlphaPC 1

9 March 1999 – Subject To ChangeUpgrading the AlphaPC 164LX 5–3Increasing Microprocessor Speed5.3 Increasing Microprocessor SpeedThis section describe

5–4 Upgrading the AlphaPC 164LX9 March 1999 – Subject To ChangeIncreasing Microprocessor Speed5.3.3 Removing the 21164 MicroprocessorRemove the microp

9 March 1999 – Subject To ChangeUpgrading the AlphaPC 164LX 5–5Increasing Microprocessor Speed6. Install the heat sink and heat-sink fan as directed i

5–6 Upgrading the AlphaPC 164LX9 March 1999 – Subject To ChangeIncreasing Microprocessor Speed2. Wearing clean gloves, pick up the GRAFOIL pad. Do not

9 March 1999 – Subject To ChangeSystem Address Space A–1 ASystem Address SpaceThis appendix describes the mapping of 21164 40-bit physical addresses t

A–2 System Address Space9 March 1999 – Subject To ChangeAddress MapTable A–2 shows system address mapping operations when IOA_BEN equals 1 (byte/word

9 March 1999 – Subject To ChangeSystem Address Space A–3Address Map87.6000.0000 – 87.6FFF.FFFF 0.25 21174 PCI address translation87.7000.0000 – 87.7F

9 March 1999 – Subject to ChangeviiFigures1–1 AlphaPC 164LX Functional Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–22–1

A–4 System Address Space9 March 1999 – Subject To ChangeAddress MapThe 21164 address space is divided into two regions using physical address <39&g

9 March 1999 – Subject To ChangeSystem Address Space A–5Address MapFigure A–1 Address Space OverviewDMA access to the system memory is achieved using

A–6 System Address Space9 March 1999 – Subject To ChangePCI Address SpaceFigure A–2 Memory RemappingA.2 PCI Address SpaceThe system generates 32-bit P

9 March 1999 – Subject To ChangeSystem Address Space A–721164 Address SpaceA.3 21164 Address SpaceFigure A–3 shows an overview of the 21164 address sp

A–8 System Address Space9 March 1999 – Subject To Change21164 Address SpaceFigure A–3 21164 Address Space ConfigurationLJ-05397.AI421164Memory SpaceRe

9 March 1999 – Subject To ChangeSystem Address Space A–921164 Address SpaceFigure A–4 21164 and DMA Read and Write TransactionsLJ-04868.AI4000XX0Size3

A–10 System Address Space9 March 1999 – Subject To Change21164 Address SpaceA.3.1 System Address MapFigure A–5 shows the following system address regi

9 March 1999 – Subject To ChangeSystem Address Space A–1121164 Address SpaceFigure A–5 System Address Map0LJ-05398.AI434 333839 3435 Memory Address

A–12 System Address Space9 March 1999 – Subject To Change21164 Byte/Word PCI SpaceFigure A–6 21174 CSR SpaceA.4 21164 Byte/Word PCI SpaceThe 21164 sup

9 March 1999 – Subject To ChangeSystem Address Space A–1321164 Byte/Word PCI SpaceFigure A–7 Byte/Word PCI SpaceOperations are the same for the four r

viii9 March 1999 – Subject to ChangeTables1–1 AlphaPC 164LX SDRAM Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . . 1–32–1 AlphaP

A–14 System Address Space9 March 1999 – Subject To Change21164 Byte/Word PCI SpaceTable A–3 shows noncached 21164 addresses when byte/word support is

9 March 1999 – Subject To ChangeSystem Address Space A–15Cacheable Memory SpaceA.5 Cacheable Memory SpaceCacheable memory space is located in the rang

A–16 System Address Space9 March 1999 – Subject To ChangePCI Dense Memory Space• The concept of dense space (and sparse space) is applicable only to a

9 March 1999 – Subject To ChangeSystem Address Space A–17PCI Sparse Memory Space Figure A–8 shows dense-space address generation.Figure A–8 Dense-Spac

A–18 System Address Space9 March 1999 – Subject To ChangePCI Sparse Memory SpaceA.7.1 Hardware Extension Register (HAE_MEM)In sparse space, addr_h<

9 March 1999 – Subject To ChangeSystem Address Space A–19PCI Sparse Memory Space• Hardware does not perform read-ahead (prefetch) transactions in spar

A–20 System Address Space9 March 1999 – Subject To ChangePCI Sparse Memory SpaceTable A–6 defines the low-order PCI sparse memory address bits. Signal

9 March 1999 – Subject To ChangeSystem Address Space A–21PCI Sparse Memory SpaceThe high-order ad<31:26> are obtained from either the hardware e

A–22 System Address Space9 March 1999 – Subject To ChangePCI Sparse Memory SpaceFigure A–10 PCI Memory Sparse-Space Address Generation – Region 2Figur

9 March 1999 – Subject To ChangeSystem Address Space A–23PCI Sparse I/O SpaceA.8 PCI Sparse I/O SpaceThe PCI sparse I/O space is divided into two regi

9 March 1999 – Subject to Changeix PrefaceOverviewThis manual describes the AlphaPC 164LX motherboard, a module for computing systems based on the Alp

A–24 System Address Space9 March 1999 – Subject To ChangePCI Sparse I/O SpaceTable A–8 contains the PCI sparse I/O space read/write encodings.Table A–

9 March 1999 – Subject To ChangeSystem Address Space A–25PCI Sparse I/O SpaceFigure A–12 PCI Sparse I/O Space Address Translation (Region A, Lower 32M

A–26 System Address Space9 March 1999 – Subject To ChangePCI Configuration SpaceA.9 PCI Configuration SpaceThe PCI configuration space is located in t

9 March 1999 – Subject To ChangeSystem Address Space A–27PCI Configuration SpaceFigure A–14 PCI Configuration Space Definition (Sparse)Figure A–15 PCI

A–28 System Address Space9 March 1999 – Subject To ChangePCI Configuration SpacePeripherals are selected during a PCI configuration cycle if the follo

9 March 1999 – Subject To ChangeSystem Address Space A–29PCI Configuration SpaceNote: If a quadword access is specified for the configuration cycle, t

A–30 System Address Space9 March 1999 – Subject To ChangePCI Configuration Spacearchically behind it. If the bus number of the configuration cycle mat

9 March 1999 – Subject To ChangeSystem Address Space A–31PCI Special/Interrupt CyclesA.10 PCI Special/Interrupt CyclesPCI special/interrupt cycles are

A–32 System Address Space9 March 1999 – Subject To ChangePCI to Physical Memory AddressThe address space here is a hardware-specific variant of sparse

9 March 1999 – Subject To ChangeSystem Address Space A–33PCI to Physical Memory AddressTable A–12 shows the PCI target window mask fields.Based on the