Compaq Computer Hardware 164LX User Manual
AlphaPC 164LX Motherboard  
Tru64 UNIX  
User’s Manual  
Order Number: EC–R2ZPC–TE  
Revision/Update Information: This is a revised document. It  
supersedes the AlphaPC 164LX  
Motherboard DIGITAL UNIX User’s  
Manual, EC–R2ZPB–TE.  
Compaq Computer Corporation  
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Contents  
1
2
About This Manual  
1.1  
Manual Conventions and Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
1-1  
Features  
2.1  
2.2  
2.3  
2.3.1  
2.3.2  
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
2-4  
2-4  
2-5  
2-6  
2-7  
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Physical Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ATX Hole Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ATX I/O Shield Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
3
4
AlphaPC 164LX Jumper Configuration  
3.1  
3.2  
3.3  
3.4  
CPU Speed Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Bcache Size Jumpers (CF1 and CF2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Boot Option Jumper (CF7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Flash ROM Update Jumper (J28). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
3-1  
3-1  
3-3  
3-3  
AlphaPC 164LX Connector Pinouts  
4.1  
4.2  
4.3  
4.4  
4.5  
4.6  
4.7  
4.8  
4.9  
4.10  
PCI Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ISA Expansion Bus Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
SDRAM DIMM Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
EIDE Drive Bus Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Diskette (Floppy) Drive Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . .  
Parallel Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
COM1/COM2 Serial Line Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Keyboard/Mouse Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
SROM Test Data Input Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Input Power Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
4-1  
4-3  
4-4  
4-5  
4-6  
4-6  
4-7  
4-7  
4-8  
4-8  
iii  
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4.11  
4.12  
4.13  
4.14  
4.15  
4.16  
4.17  
4.18  
Enclosure Fan Power Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Speaker Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Microprocessor Fan Power Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . .  
Power LED Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
EIDE Drive LED Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Reset Button Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Halt Button Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Soft Power Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
4-8  
4-9  
4-9  
4-9  
4-10  
4-10  
4-10  
4-10  
5
Memory and Microprocessor Configuration  
5.1  
5.2  
5.3  
5.3.1  
5.3.2  
5.3.3  
5.3.4  
Configuring SDRAM Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Upgrading SDRAM Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Increasing Microprocessor Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Preparatory Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Removing the 21164 Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Installing the 21164 Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
5-1  
5-2  
5-3  
5-3  
5-3  
5-4  
5-4  
6
7
Interrupts and ISA Bus Addresses  
6.1  
6.2  
6.2.1  
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ISA I/O Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Flash ROM Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
6-1  
6-2  
6-3  
Alpha SRM Console Firmware  
7.1  
7.2  
7.3  
Alpha SRM Console Firmware Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Basic Alpha SRM Console Command Descriptions . . . . . . . . . . . . . . . . . . . . . . .  
Environment Variables for Alpha SRM Console Commands. . . . . . . . . . . . . . . .  
Environment Variable Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Architecture-Required Environment Variables . . . . . . . . . . . . . . . . . . . .  
System-Defined Environment Variables. . . . . . . . . . . . . . . . . . . . . . . . .  
Using the AlphaBIOS Firmware Update Utility to Update the Flash ROM . . . . . .  
AlphaBIOS Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Starting the AlphaBIOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Installing Alpha SRM Console Using AlphaBIOS Setup Program . . . . . . . . .  
Installing the Tru64 UNIX Operating System . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
7-1  
7-3  
7-18  
7-18  
7-19  
7-20  
7-22  
7-22  
7-23  
7-24  
7-29  
7-29  
7.3.1  
7.3.1.1  
7.3.1.2  
7.4  
7.4.1  
7.4.2  
7.4.3  
7.5  
7.5.1  
iv  
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8
Troubleshooting  
8.1  
8.2  
8.3  
8.4  
Hardware Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
8-1  
8-2  
8-2  
8-4  
Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Post Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Fail-Safe Booter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
9
Battery Recycle/Disposal Information  
Support  
A
A.1  
A.2  
Customer Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Supporting Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Thermal Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Alpha Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Third–Party Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
A-1  
A-2  
A-2  
A-2  
A-2  
A-3  
A-3  
A-4  
A.2.1  
A.2.2  
A.2.3  
A.2.4  
A.3  
A.4  
v
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Figures  
2–1  
2–2  
2–3  
3–1  
5–1  
7–1  
7–2  
7–3  
7–4  
7–5  
7–6  
AlphaPC 164LX Jumper/Connector/Component Location . . . . . . . . . . . . . . . . . .  
ATX Hole Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ATX I/O Shield Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaPC 164LX Configuration Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Fan/Heat-Sink Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaBIOS Boot Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaBIOS Setup Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaBIOS Upgrade Options Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaBIOS Warning Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaBIOS Upgrade SRM Console Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaBIOS Upgrade Complete Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
2-2  
2-6  
2-7  
3-2  
5-5  
7-23  
7-24  
7-25  
7-26  
7-27  
7-28  
vi  
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Tables  
2–1  
2–2  
2–3  
2–4  
4–1  
4–2  
4–3  
4–4  
4–5  
4–6  
4–7  
4–8  
4–9  
AlphaPC 164LX Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaPC 164LX Jumper/Connector/Component List . . . . . . . . . . . . . . . . . . . . . .  
Power Supply DC Current Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaPC 164LX Motherboard Environmental Requirements . . . . . . . . . . . . . . . .  
PCI Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ISA Expansion Bus Connector Pinouts (J30, J31) . . . . . . . . . . . . . . . . . . . . . . . .  
SDRAM DIMM Connector Pinouts (J8 through J11) . . . . . . . . . . . . . . . . . . . . .  
EIDE Drive Bus Connector Pinouts (J6, J7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Diskette (Floppy) Drive Bus Connector Pinouts (J15). . . . . . . . . . . . . . . . . . . . . .  
Parallel Bus Connector Pinouts (J13). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
COM1/COM2 Serial Line Connector Pinouts (J4). . . . . . . . . . . . . . . . . . . . . . . . .  
Keyboard/Mouse Connector Pinouts (J5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
SROM Test Data Input Connector Pinouts (J29) . . . . . . . . . . . . . . . . . . . . . . . . .  
Input Power Connector Pinouts (J3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Enclosure Fan (+12 V dc) Power Connector Pinouts (J2, J19) . . . . . . . . . . . . . .  
Speaker Connector Pinouts (J20). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Microprocessor Fan Power Connector Pinouts (J18) . . . . . . . . . . . . . . . . . . . . . .  
Power LED Connector Pinouts (J24) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
EIDE Drive LED Connector Pinouts (J25). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Reset Button Connector Pinouts (J21) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Halt Button Connector Pinouts (J22) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Soft Power Connector Pinouts (J1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaPC 164LX SDRAM Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . .  
ISA Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ISA I/O Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AlphaBIOS Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Post Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
2-1  
2-3  
2-4  
2-5  
4-1  
4-3  
4-4  
4-5  
4-6  
4-6  
4-7  
4-7  
4-8  
4-8  
4-8  
4-9  
4-9  
4-9  
4-10  
4-10  
4-10  
4-10  
5-2  
6-1  
6-2  
7-22  
8-2  
8-2  
4–10  
4–11  
4–12  
4–13  
4–14  
4–15  
4–16  
4–17  
4–18  
5–1  
6–1  
6–2  
7–1  
8–1  
8–2  
vii  
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1
About This Manual  
This manual describes the AlphaPC 164LX motherboard, a module for computing  
systems based on the Alpha 21164 microprocessor and the companion 21174 core  
logic chip. It describes the motherboard’s features and how to set its configuration  
jumpers. This manual helps users to install and populate the AlphaPC 164LX  
motherboard with memory modules and peripheral cards.  
1.1 Manual Conventions and Terminology  
The following conventions are used in this manual.  
Caution: Cautions indicate potential damage to equipment, software, or data.  
Note: Notes provide additional information about a topic.  
Numbering: All numbers are decimal or hexadecimal unless otherwise indicated. In  
case of ambiguity, a subscript indicates the radix of nondecimal numbers. For  
example, 19 is a decimal number, but 19 and 19A are hexadecimal numbers.  
16  
Extents: Extents are specified by a single number or a pair of numbers in square  
brackets ([ ]) separated by a colon (:), and are inclusive. For example, bits [7:3]  
specify an extent including bits 7, 6, 5, 4, and 3. Multiple bit fields are shown as  
extents.  
Register Figures: Register figures have bit and field position numbering starting at  
the right (low-order) and increasing to the left (high-order).  
Signal Names: All signal names are printed in boldface type. Signal names that  
originate in an industry-standard specification, such as PCI or IDE, are printed in the  
case as found in the specification (usually uppercase). Active low signals have either  
a pound sign “#” appended, or a “not” overscore bar; for example, DEVSEL# and  
RESET.  
About This Manual  
1–1  
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Manual Conventions and Terminology  
Italic Type: Italic type emphasizes important information and indicates complete  
titles of documents.  
Terms: The following terms are used in this manual:  
This term...  
Refers to...  
Alpha SRM console  
DIGITAL UNIX installation guide  
Tru64 UNIX  
The Alpha SRM Console firmware  
The DIGITAL UNIX Installation Guide  
The Tru64 UNIX (formerly DIGITAL UNIX)  
operating system  
1–2  
About This Manual  
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2
Features  
Table 2–1 provides an overview of the AlphaPC 164LX motherboard’s features.  
Table 2–1 AlphaPC 164LX Features  
Feature  
Description  
Microprocessor  
Alpha 21164 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 (SDRAM) 32MB to 1GB memory array –- Two banks of 128-bit memory;  
memory  
168-pin unbuffered SDRAM DIMMs  
Caching:  
L1 Icache  
L1 Dcache  
L2 Scache  
8KB, direct-mapped instruction cache on the CPU chip  
8KB, direct-mapped data cache on the CPU chip  
96KB, three-way, set-associative, write-back unified instruction  
and data cache on the CPU chip  
L3 backup cache  
Onboard 2MB, direct-mapped, synchronous SSRAM backup  
cache with 128-bit data path  
I/O and miscellaneous support  
32-bit and 64-bit, 33-MHz PCI  
Two 64-bit and two 32-bit PCI expansion slots  
PCI/EIDE control (CMD PCI0646)  
Intel 82378ZB PCI-to-ISA bridge chip  
Two dedicated ISA expansion slots  
SMC FDC37C935 combination controller chip provides control  
for diskettes, two UARTs with modem control, parallel port, key-  
board, mouse, and time-of-year clock  
1MB flash ROM  
Firmware  
Alpha SRM Console firmware  
Features  
2–1  
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Figure 2–1 shows the AlphaPC 164LX motherboard and its components and  
Table 2–2 describes these components.  
Figure 2–1 AlphaPC 164LX Jumper/Connector/Component Location  
J27  
J28  
J30  
J31  
U62  
J25  
J24  
J18  
J29  
J26  
J23  
U61  
*
U58  
U59  
U60  
*
B1  
*
*
*
*
*
*
J17  
J16  
U53  
U50  
U49  
U48  
*
U43  
J15  
U42  
J19  
J20  
J21  
J22  
U41  
U40  
*
*
U37  
J13  
U31  
U20  
U8  
U32  
U21  
U9  
U33  
U22  
J5  
J4  
J6  
J7  
U10  
*
*
J3  
J1  
J8  
J9  
J10  
J5  
J11  
J2  
Top:  
Mouse  
Top:  
Bottom: COM2  
COM1  
J4  
Denotes Pin #1  
Bottom: Keyboard  
*
FM-05933.AI4  
2–2  
Features  
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Table 2–2 AlphaPC 164LX Jumper/Connector/Component List  
Item No. Description  
Item No.  
J25  
Description  
B1  
J1  
J2  
J3  
RTC battery (CR2032)  
Hard-drive LED connector  
PCI slot 0 (64-bit)  
Soft power connector  
J26  
Fan power, enclosure (+12V)  
J27  
System configuration jumpers  
Power (+3V, +5V, -5V, +12V, -12V) J28  
Flash ROM update enable/disable  
jumper  
J4  
J5  
J6  
J7  
J8  
J9  
J10  
COM1/COM2 (DB9) connectors  
Keyboard/mouse connectors  
EIDE drive 2/3 connector  
J29  
J30  
J31  
SROM test port connector  
ISA slot 1  
ISA slot 0  
EIDE drive 0/1 connector  
U8 to U10 Cache SRAM (L3)  
U20 to U22 Cache SRAM (L3)  
SDRAM DIMM 0 [0:63] connector  
SDRAM DIMM 1 [64:128] connector U31 to U33 Cache SRAM (L3)  
SDRAM DIMM 2 [0:63] connector  
U37  
I/O interface and address control  
(DS 21174-CA)  
J11  
SDRAM DIMM 3 [64:128] connector U40  
Microprocessor, socket  
(DS Alpha 21164)  
J12  
J13  
J14  
J15  
Reserved  
U41  
U42  
U43  
U48  
Patch 8K PAL  
Parallel I/O connector  
Reserved  
EIDE controller  
System clock PLL (CY2308)  
Diskette (floppy) drive connector  
Microprocessor clock synthesizer  
(MC12439)  
J16  
PCI slot 3 (32-bit)  
U49  
Serial ROM, socketed (Xilinx  
XC17128D)  
J17  
J18  
PCI slot 2 (32-bit)  
U50  
PCI-to-ISA bridge (Intel 82378ZB)  
Microprocessor fan/fan sense connec- U53  
tor  
Combination controller, Super I/O  
(SMC FDC37C935)  
J19  
J20  
J21  
J22  
J23  
J24  
Enclosure fan +12V power connector U58  
Flash ROM (1MB)  
PCI arbiter PAL  
Speaker connector  
U59  
U60  
U61  
U62  
Reset button connector  
Halt button connector  
PCI slot 1 (64-bit)  
PCI interrupt request PAL  
Power controller  
Power sense  
Power LED connector  
Features  
2–3  
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Power Requirements  
2.1 Power Requirements  
The AlphaPC 164LX motherboard has a total power dissipation of 100 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  
+3.3 V dc, ±5%  
+5 V dc, ±5%  
Current  
5.0 A  
14.0 A  
0 A  
–5 V dc, ±5%  
+12 V dc, ±5%  
1.0 A  
–12 V dc, ±5%  
100.0 mA  
1
Values indicated are for an AlphaPC 164LX motherboard with an Alpha 21164 microprocessor  
operating at 600 MHz, with 64MB SDRAM, excluding adapter cards and disk drives.  
Caution: Fan sensor required. The 21164 microprocessor cooling fan must have  
a built-in sensor that will drive a signal if the airflow stops. The sensor is  
connected to motherboard connector J18. When the signal is generated,  
it resets the system.  
2.2 Environmental Requirements  
The 21164 microprocessor is cooled by a small fan blowing directly into the chip’s  
heat sink. The AlphaPC 164LX motherboard is designed to run efficiently by using  
only this fan. Additional fans may be necessary depending upon cabinetry and the  
requirements of plug-in cards.  
2–4  
Features  
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Physical Parameters  
The AlphaPC 164LX motherboard is specified to run within the environment listed  
in Table 2–4.  
Table 2–4 AlphaPC 164LX Motherboard Environmental Requirements  
Parameter  
Specification  
Operating temperature  
Storage temperature  
Relative humidity  
10°C to 40°C (50°F to 104°F)  
–55°C to 125°C (–67°F to 257°F)  
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 11°C/hour ±2°C/hour (20°F/hour ±4°F/hour)  
change  
2.3 Physical Parameters  
The AlphaPC 164LX motherboard is an ATX-size printed-wiring board (PWB) with  
the following dimensions:  
•
•
•
Length: 30.48 cm (12.0 in ±0.0005 in)  
Width: 24.38 cm (9.6 in ±0.0005 in)  
Height: 6.86 cm (2.7 in)  
Features  
2–5  
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Physical Parameters  
2.3.1 ATX Hole Specification  
Figure 2–2 shows the ATX Hole Specification for the AlphaPC 164LX. Measurements  
are shown in inches.  
Figure 2–2 ATX Hole Specification  
.800  
TYP Between  
Connectors  
4.900  
.650  
.500  
.400  
1.612  
1.300  
.600  
.625  
PCI Connector  
(4 Places)  
8.950  
6.100  
9.600  
ISA Connector  
(2 Places)  
11.100  
12.000  
This ATX hole is not supported  
on AlphaPC 164LX board, and no  
clearance is provided on side 2.  
This ATX hole is not supported  
on AlphaPC 164LX board,  
however clearance is provided  
on side 2.  
FM-06012.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 164LX. Measure-  
ments are shown in millimeters.  
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  
17.95  
14.96  
22.95  
23.96  
29.10  
33.10  
R 1.00  
7.19 TYP  
FM-05986.AI4  
Features  
2–7  
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3
AlphaPC 164LX Jumper Configuration  
The AlphaPC 164LX motherboard has two groups of jumpers located at J27 and J28,  
as shown in Figure 2–1. These jumpers set the hardware configuration and boot  
options. Figure 3–1 shows these jumper configurations.  
3.1 CPU Speed Selection  
The clock synthesizer at location U47 makes it possible to change the frequency of  
the microprocessor’s system clock output without having to change the clock crystal.  
Simply set the system clock divisor jumpers to adjust the frequency of the  
microprocessor’s system clock output. These system clock divisor jumpers are  
located at J27–1/2 (IRQ3), J27–3/4 (IRQ2), J27–5/6 (IRQ1), and J27–7/8 (IRQ0).  
The jumper configuration is set in IRQ3 through IRQ0. These four jumpers set the  
speed at power-up as listed in Figure 3–1. The microprocessor frequency divided by  
the ratio determines the system clock frequency.  
3.2 Bcache Size Jumpers (CF1 and CF2)  
The Bcache size jumpers are located at J27–11/12 (CF) and J27–13/14 (CF2). These  
jumpers configure the Bcache as specified in Figure 3–1.  
AlphaPC 164LX Jumper Configuration  
3–1  
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Bcache Size Jumpers (CF1 and CF2)  
Figure 3–1 AlphaPC 164LX Configuration Jumpers  
J27 System Configuration Jumpers  
1
IRQ3  
Frequency Ratio IRQ3 IRQ2 IRQ1 IRQ0 Comments  
3
5
IRQ2  
466 MHz  
533 MHz  
600 MHz  
7
8
9
In  
Out  
In  
Out  
In  
Out  
In  
Default  
Out  
Out  
IRQ1  
IRQ0  
CF0  
In  
In  
Out  
7
9
All other combinations are reserved.  
Reserved (Default Out)  
11  
CF1  
CF2  
CF3  
Bcache Size  
2MB  
CF1  
Out  
CF2  
Out  
Comments  
Default  
13  
15  
All other combinations are reserved.  
Reserved (Default Out)  
Reserved (Default Out)  
Reserved (Default Out)  
Reserved (Default Out)  
17  
19  
21  
23  
CF4  
CF5  
CF6  
CF7  
Boot_Option (Default Out)  
Reserved (Default Out)  
25  
J28 Flash ROM Update Jumpers  
1
1 to 2 In = Disable  
2
2 to 3 In = Enable (Default)  
3
3–2  
AlphaPC 164LX Jumper Configuration  
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Boot Option Jumper (CF7)  
3.3 Boot Option Jumper (CF7)  
The boot option jumper is located at J27–23/24 (CF7). The default position for this  
jumper is out (Figure 3–1). This jumper selects the image to be loaded into memory  
from the system flash ROM. With the jumper out, the SRM Console firmware is  
loaded. With the jumper in, the fail-safe booter is loaded. For more information  
about the fail-safe booter, refer to Section 8.4.  
3.4 Flash ROM Update Jumper (J28)  
When J28–2/3 are jumpered together (default), the flash ROM is write-enabled.  
When J28–1/2 are jumpered together, the flash ROM is write-protected.  
AlphaPC 164LX Jumper Configuration  
3–3  
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4
AlphaPC 164LX Connector Pinouts  
This chapter contains pinouts for all of the AlphaPC 164LX connectors. See  
Figure 2–1 for connector locations.  
4.1 PCI Bus Connector Pinouts  
Table 4–1 shows the PCI bus connector pinouts.  
Table 4–1 PCI Bus Connector Pinouts  
Pin  
Signal  
Pin  
Signal  
Pin  
Signal  
Pin  
Signal  
32-Bit and 64-Bit PCI Connectors (J16, J17, J23, J26)  
A1  
TRST#  
Vdd  
A2  
A6  
+12V  
INTA  
A3  
TMS  
INTC  
—
A4  
TDI  
A5  
A7  
A8  
Vdd  
A9  
—
A10 Vdd  
A14  
A11  
A15  
A19  
A23  
A27  
A31  
A35  
A39  
A43  
A47  
A51  
A55  
A59  
B1  
A12  
A16  
A20  
A24  
A28  
A32  
A36  
A40  
A44  
A48  
A52  
A56  
A60  
B2  
Gnd  
A13  
A17  
A21  
A25  
A29  
A33  
A37  
A41  
A45  
A49  
A53  
A57  
A61  
B3  
Gnd  
—
RST#  
—
Vdd  
GNT#  
+3V  
A18 Gnd  
AD[30]  
Gnd  
A22 AD[28]  
A26 IDSEL  
A30 Gnd  
AD[26]  
+3V  
AD[24]  
AD[20]  
+3V  
AD[22]  
AD[16]  
TRDY#  
SDONE  
AD[15]  
Gnd  
AD[18]  
Gnd  
A34 FRAME#  
A38 STOP#  
A42 Gnd  
STOP#  
SBO#  
+3V  
+3V  
PAR  
A46 AD[13]  
A50 Not used  
A54 AD[06]  
A58 AD[00]  
A62 Vdd  
AD[11]  
Not used  
AD[04]  
Vdd  
AD[09]  
+3V  
C/BE#[0]  
Gnd  
AD[02]  
Vdd  
REQ64#  
TCK  
-12V  
Gnd  
B4  
B8  
TDO  
B5  
Vdd  
B6  
Vdd  
B7  
INTB  
INTD  
B9  
PRSNT1#  
B10  
—
AlphaPC 164LX Connector Pinouts  
4–1  
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PCI Bus Connector Pinouts  
Table 4–1 PCI Bus Connector Pinouts (Continued)  
Pin  
Signal  
PRSNT2#  
Gnd  
Pin  
Signal  
Pin  
Signal  
Gnd  
Pin  
Signal  
—
B11  
B15  
B19  
B23  
B27  
B31  
B35  
B39  
B43  
B47  
B51  
B55  
B59  
B12 Gnd  
B13  
B17  
B21  
B25  
B29  
B33  
B37  
B41  
B45  
B49  
B53  
B57  
B61  
B14  
B18  
B22  
B26  
B30  
B34  
B38  
B42  
B46  
B50  
B54  
B58  
B62  
B16 CLK  
Gnd  
REQ#  
Gnd  
Vdd  
B20 AD[31]  
B24 AD[25]  
B28 Gnd  
AD[29]  
+3V  
AD[27]  
AD[23]  
+3V  
C/BE#[3]  
AD[19]  
Gnd  
AD[21]  
C/BE#[2]  
DEVSEL#  
+3V  
B32 AD[17]  
B36 +3V  
IRDY#  
LOCK#  
+3V  
Gnd  
B40 PERR#  
B44 C/BE#[1]  
B48 AD[10]  
B52 AD[08]  
B56 AD[03]  
B60 ACK64#  
SERR#  
Gnd  
AD[14]  
Gnd  
AD[12]  
Not used  
AD[05]  
Vdd  
Not used  
+3V  
AD[07]  
Gnd  
AD[01]  
Vdd  
Vdd  
64-Bit PCI Connectors Only (J23, J26)  
A63  
A67  
A71  
A75  
A79  
A83  
A87  
A91  
B63  
B67  
B71  
B75  
B79  
B83  
B87  
B91  
Gnd  
A64 C/BE#[7]  
A68 D[62]  
A72 Gnd  
A65  
A69  
A73  
A77  
A81  
A85  
A89  
A93  
B65  
B69  
B73  
B77  
B81  
B85  
B89  
B93  
C/BE#[5]  
Gnd  
A66  
A70  
A74  
A78  
A82  
A86  
A90  
A94  
B66  
B70  
B74  
B78  
B82  
B86  
B90  
B94  
Vdd  
PAR64  
D[58]  
Vdd  
D[60]  
D[54]  
Gnd  
D[56]  
D[50]  
Gnd  
A76 D[52]  
A80 D[46]  
A84 Vdd  
D[48]  
D[42]  
Gnd  
D[44]  
D[38]  
Gnd  
D[40]  
D[34]  
Gnd  
A88 D[36]  
D[32]  
—
A92  
—
—
B64 Gnd  
B68 D[63]  
B72 D[57]  
B76 Gnd  
B80 D[47]  
B84 D[41]  
B88 Vdd  
C/BE#[6]  
D[61]  
Gnd  
C/BE#[4]  
Vdd  
Gnd  
D[59]  
D[53]  
Vdd  
D[55]  
D[49]  
Gnd  
D[51]  
D[45]  
Gnd  
D[43]  
D[37]  
Gnd  
D[39]  
D[33]  
Gnd  
D[35]  
—
B92  
—
4–2  
AlphaPC 164LX Connector Pinouts  
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ISA Expansion Bus Connector Pinouts  
4.2 ISA Expansion Bus Connector Pinouts  
Table 4–2 shows the ISA expansion bus connector pinouts.  
Table 4–2 ISA Expansion Bus Connector Pinouts (J30, J31)  
Pin  
1
Signal  
Gnd  
Pin  
2
Signal  
IOCHCK#  
SD6  
Pin  
3
Signal  
Pin  
4
Signal  
SD7  
RSTDRV  
IRQ9  
5
Vdd  
6
7
8
SD5  
9
–5V  
10  
14  
18  
22  
26  
30  
34  
38  
42  
46  
50  
54  
58  
62  
66  
70  
74  
78  
82  
86  
90  
94  
98  
SD4  
11  
15  
19  
23  
27  
31  
35  
39  
43  
47  
51  
55  
59  
63  
67  
71  
75  
79  
83  
87  
91  
95  
—
DRQ2  
12  
16  
20  
24  
28  
32  
36  
40  
44  
48  
52  
56  
60  
SD3  
13  
17  
21  
25  
29  
33  
37  
41  
45  
49  
53  
57  
61  
65  
69  
73  
77  
81  
85  
89  
93  
97  
–12V  
SD2  
ZEROWS#  
Gnd  
SD1  
+12V  
SD0  
IOCHRDY  
SA19  
SA17  
SA15  
SA13  
SA11  
SA9  
SMEMW#  
IOW#  
DACK3#  
DACK1#  
REFRESH#  
IRQ7  
AEN  
SA18  
SA16  
SA14  
SA12  
SA10  
SA8  
SMEMR#  
IOR#  
DRQ3  
DRQ1  
SYSCLK  
IRQ6  
IRQ5  
IRQ4  
SA7  
IRQ3  
SA6  
DACK2#  
BALE  
SA5  
TC  
SA4  
SA3  
Vdd  
SA2  
OSC  
SA1  
Gnd  
SA0  
MEMCS16# 64  
SBHE#  
LA22  
LA20  
LA18  
MEMR#  
SD8  
IOCS16#  
IRQ11  
IRQ15  
DACK0#  
DACK5#  
DACK6#  
DACK7#  
Vdd  
LA23  
LA21  
LA19  
LA17  
MEMW#  
SD9  
IRQ10  
IRQ12  
IRQ14  
DRQ0  
DRQ5  
DRQ6  
DRQ7  
MASTER#  
—
68  
72  
76  
80  
84  
88  
92  
96  
—
SD10  
SD12  
SD14  
—
SD11  
SD13  
SD15  
Gnd  
AlphaPC 164LX Connector Pinouts  
4–3  
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SDRAM DIMM Connector Pinouts  
4.3 SDRAM DIMM Connector Pinouts  
Table 4–3 shows the SDRAM DIMM connector pinouts.  
Table 4–3 SDRAM DIMM Connector Pinouts (J8 through J11)1  
Pin  
1
Signal  
Gnd  
DQ3  
DQ6  
DQ9  
DQ13  
CB0  
NC  
Pin  
2
Signal  
DQ0  
+3V  
Pin  
3
Signal  
DQ1  
DQ4  
DQ8  
DQ11  
DQ14  
Gnd  
Pin  
4
Signal  
DQ2  
DQ5  
Gnd  
5
6
7
8
9
10  
14  
18  
22  
26  
30  
34  
38  
42  
46  
50  
54  
58  
62  
66  
70  
74  
78  
82  
86  
90  
94  
98  
102  
106  
110  
114  
118  
122  
DQ7  
DQ10  
+3V  
11  
12  
16  
20  
24  
28  
32  
36  
40  
44  
48  
52  
56  
60  
64  
68  
72  
76  
80  
84  
88  
92  
96  
100  
104  
108  
112  
116  
120  
124  
13  
17  
21  
25  
29  
33  
37  
41  
45  
49  
53  
57  
61  
65  
69  
73  
77  
81  
85  
89  
93  
97  
101  
105  
109  
113  
117  
121  
15  
19  
23  
27  
31  
35  
39  
43  
47  
51  
55  
59  
63  
67  
71  
75  
79  
83  
87  
91  
95  
99  
103  
107  
111  
115  
119  
123  
DQ12  
DQ15  
NC  
CB1  
+3V  
WE  
DQMB0  
Gnd  
DQMB1  
A0  
S0  
NC  
A2  
A4  
A6  
A8  
A10  
A12  
+3V  
+3V  
CK0  
DQMB2  
NC  
Gnd  
NC  
S2  
DQMB3  
NC  
NC  
+3V  
CB2  
CB3  
DQ18  
NC  
Gnd  
DQ19  
NC  
DQ16  
+3V  
DQ17  
DQ20  
Gnd  
CKE1  
DQ23  
DQ26  
DQ29  
CK2  
SCL  
DQ33  
DQ36  
DQ40  
DQ43  
DQ46  
Gnd  
DQ21  
DQ24  
+3V  
DQ22  
DQ25  
DQ28  
Gnd  
SDA  
DQ32  
+3V  
Gnd  
DQ27  
DQ30  
NC  
DQ31  
NC  
+3V  
Gnd  
DQ35  
DQ38  
DQ41  
DQ45  
CB4  
NC  
DQ34  
DQ37  
Gnd  
DQ39  
DQ42  
+3V  
DQ44  
DQ47  
NC  
CB5  
+3V  
CAS  
RAS  
A5  
DQMB4  
Gnd  
DQMB5  
A1  
S1  
A3  
A7  
A9  
BA0  
A13  
+3V  
4–4  
AlphaPC 164LX Connector Pinouts  
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EIDE Drive Bus Connector Pinouts  
Table 4–3 SDRAM DIMM Connector Pinouts (J8 through J11)1 (Continued)  
Pin  
125  
129  
133  
137  
141  
145  
149  
153  
157  
161  
Signal  
CK1  
S3  
Pin  
126  
130  
134  
138  
142  
146  
150  
154  
158  
162  
166  
Signal  
BA12  
DQMB6  
NC  
Pin  
127  
131  
135  
139