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AlphaPC 164SX Motherboard
DIGITAL UNIX
User’s Manual
Order Number: EC–R8P7B–TE
Revision/Update Information: This is a revised document. It supersedes
the AlphaPC 164SX Motherboard
DIGITAL UNIX User’s Manual,
EC–R8P7A–TE.
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October 1998 The information in this publication is subject to change without notice. COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR CONSEQUENTIAL DAM- AGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL. THIS INFORMATION IS PROVIDED "AS IS" AND COMPAQ COMPUTER CORPORATION DISCLAIMS ANY WARRANTIES, EXPRESS, IMPLIED OR STATUTORY AND EXPRESSLY DISCLAIMS THE IMPLIED WAR- RANTIES OF MERCHA
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Contents 1 About This Manual 1.1 Manual Conventions and Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2 Features 2.1 Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.2 Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.3 Physical Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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4.12 Microprocessor Fan Power Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 4.13 Soft Power Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 4.14 Multipurpose Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 5 Memory and Microprocessor Configuration 5.1 Configuring SDRAM Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5.2 Upgra
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9 Battery Recycle/Disposal Information A Support, Products, and Documentation A.1 Customer Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 A.2 Supporting Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 A.2.1 Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 A.2.2 Thermal Products . . . . . . . . . . . . . . . .
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Figures 2–1 AlphaPC 164SX Switch/Connector/Component Location. . . . . . . . . . . . . . . . . . . 2-2 2–2 ATX Hole Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 2–3 ATX I/O Shield Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 3–1 AlphaPC 164SX Configuration Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 4–1 Multipurpose Connector Pinouts. . . . . . . . . .
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Tables 2–1 AlphaPC 164SX Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2–2 AlphaPC 164SX Switch/Connector/Component List. . . . . . . . . . . . . . . . . . . . . . . 2-3 2–3 Power Supply DC Current Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2–4 AlphaPC 164SX Motherboard Environmental Requirements . . . . . . . . . . . . . . . . 2-5 4–1 PCI Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . .
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1 About This Manual This manual describes the AlphaPC 164SX motherboard, a board for computing systems based on the Alpha 21164PC microprocessor and the companion 21174 core logic chip. It describes the motherboard’s features and how to set its configuration switches. This manual helps users to install and populate the AlphaPC 164SX motherboard with memory boards and peripheral cards. 1.1 Manual Conventions and Terminology The following conventions are used in this manual. Caution: Cautions
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Manual Conventions and Terminology Terms: The following terms are used in this manual: This term... Refers to... Alpha SRM console The Alpha SRM Console firmware DIGITAL UNIX installation guide The DIGITAL UNIX Installation Guide DIGITAL UNIX The DIGITAL UNIX operating system 1–2 About This Manual
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2 Features Table 2–1 provides an overview of the AlphaPC 164SX motherboard’s features. Table 2–1 AlphaPC 164SX Features Feature Description Microprocessor Alpha 21164PC microprocessor (64-bit RISC) Core logic chip 21174 core logic chip, comprising a single control chip that pro- vides an interface to system memory and the PCI bus Synchronous DRAM 32MB to 512MB memory array -- Two banks of 128-bit memory; (SDRAM) memory 168-pin unbuffered SDRAM DIMMs. Caching L1 Icache 16KB, direct-mapped,
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Figure 2–1 shows the AlphaPC 164SX motherboard and its components, and Table 2–2 describes these components. Figure 2–1 AlphaPC 164SX Switch/Connector/Component Location U56 J23 XU59 U55 SW1 J22 Q7 Q8 J20 U53 U54 J21 U52 U50 U51 Q5 J19 Q4 U49 XB1 J18 X3 U48 J17 X2 U46 X1 U47 J16 J15 U45 U44 U40 U41 U42 U43 U39 U36 U37 U38 U35 J14 U34 U32 J11 21164PC U31 J5 J6 21174 U33 U28 J13 U27 U29 U30 U25 U20 U21 U22 U23 J7 J8 J9 J10 U26 U24 U17 U19 U18 J4 U10 U11 U15 U12 U14 U13 U16 U7 U9 U8 U5 J3 U6 U3
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Table 2–2 AlphaPC 164SX Switch/Connector/Component List Item No. Description Item No. Description XB1 RTC battery (CR2032) J20 LEDs/speaker/buttons connectors J1 Soft power connector J21 SROM test port connector J2 Input power (+3 V, +5 V, -5 V, +12 V, J22 ISA slot 1 -12 V) J3 COM1/COM2 (DB9) connectors J23 ISA slot 0 J4 Keyboard/mouse connectors SW1 Configuration switchpack J5 EIDE drive 2/3 connector U48 System clock PLL (CY2081) J6 EIDE drive 0/1 connector U10, U11, L2 cache data SRAMs U20, U
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Power Requirements 2.1 Power Requirements The AlphaPC 164SX motherboard has a total power dissipation of 90 W, excluding any plug-in PCI and ISA devices. Table 2–3 lists the power requirement for each dc supply voltage. The power supply must be ATX-compliant. Table 2–3 Power Supply DC Current Requirements 1 Voltage/Tolerance Current +3.3 V dc, ±5% 5.0 A +5 V dc, ±5% 12.0 A –5 V dc, ±5% 0.0 A +12 V dc, ±5% 1.0 A –12 V dc, ±5% 100.0 mA 1 Values indicated are for an AlphaPC 164SX motherboard with
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Physical Parameters Table 2–4 AlphaPC 164SX Motherboard Environmental Requirements Parameter Specification Operating temperature 10°C to 40°C (50°F to 104°F) Storage temperature –55°C to 125°C (–67°F to 257°F) Relative humidity 10% to 90% with maximum wet bulb temperature 28°C (82°F) and minimum dew point 2°C (36°F) Rate of (dry bulb) temperature change 11°C/hour ±2°C/hour (20°F/hour ±4°F/hour) 2.3 Physical Parameters The AlphaPC 164SX motherboard is an ATX-size printed-wiring board (PWB) with
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Physical Parameters 2.3.1 ATX Hole Specification Figure 2–2 shows the ATX hole specification for the AlphaPC 164SX. Figure 2–2 ATX Hole Specification .800 TYP Between Connectors 4.900 .650 .500 1.612 .400 1.300 .600 PCI Connector .625 (4 Places) 8.950 6.100 9.600 ISA Connector (2 Places) 11.100 12.000 FM-06122.AI4 2–6 Features
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Physical Parameters 2.3.2 ATX I/O Shield Requirements Figure 2–3 shows the ATX I/O shield dimensions for the AlphaPC 164SX. Figure 2–3 ATX I/O Shield Dimensions R 1.00 21.36 16.05 5.00 TYP 9.25 3.58 2.45 4.35 11.15 15.47 14.96 17.95 22.95 23.96 29.10 33.10 R 1.00 7.19 TYP FM-05986.AI4 Features 2–7 68.4 64.91 64.9 60.26 51.27 42.28 40.48 34.13 25.14 24.7 16.15 16.7 14.35 8.00 0.99 9.98 11.78 18.13 19.93 28.92 35.5 37.91 43.5 44.26 46.06 55.05 64.04 70.39 72.19 74.8 78.2 81.18 85.4 87.2 90.17 94.4
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3 AlphaPC 164SX Switch Configuration The AlphaPC 164SX motherboard has a switchpack located at SW1, as shown previously in Figure 2–1. These switches set the hardware configuration. Figure 3–1 shows these switch configurations. 3.1 Mini-Debugger (CF3) The Alpha SROM Mini-Debugger is stored in the flash ROM and is enabled/ disabled by switch CF3. The default position for this switch is on (see Figure 3–1). When this switch is off, it causes the SROM initialization to trap to the Mini- Debugge
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Fail-Safe Booter (CF7) Figure 3–1 AlphaPC 164SX Configuration Switches Note: Switch defaults are in bold. 01 CF0 Reserved. This must remain CF0=1, CF1=0. CF1 Reserved. CF2 Mini-Debugger: 0 enables Mini-Debugger 1 disables Mini-Debugger CF3 CF4 CF Bit: 400 MHz 533 MHz Note: 41 1 All other combinations CF5 are reserved. 51 0 CF6 61 1 CF7 Fail-Safe Booter: 0: Fail Safe 1: Alpha SRM Console 3–2 AlphaPC 164SX Switch Configuration
