Digital Equipment AlphaPC 164SX User Manual

AlphaPC 164SX Motherboard
DIGITAL UNIX

User’s Ma nual

Order Number: EC–R8P7A–TE

Revision/Update Information:

This is a new document.

November 1997

©Digital Equipment Corporation 1997. All rights reserved.
Printed in U.S.A.

AlphaPC, DECnet, DIGIT AL, DIGITAL Semiconductor , DIGIT AL UNIX, OpenVMS, ThinWire, and the DIGITAL
logo are trademarks of Digital Equipme nt Corporation.

DIGITAL Semiconductor is a Digital Equipment Corporation business.

Cypress and hyper Ca che are trademarks of Cypress Semiconductor Corpo ra tion.

GRAFOIL is a registered trademark of Uni on Ca rbide Corporation.

Linux is a registered trademark of Croce, William R. Dell a, Jr.

Microsoft, MS-DOS, and Windows are re gi stered trademarks and Windows NT is a trademark of Microsoft
Corporation.

SMC is a registered trade mark of Standard Microsystem s Corporation.

UNIX is a registered trade m ark in the United States and other countries, licensed ex cl usively through X/Open
Company Limited.

All other trademarks and registered trad em arks are the property o f the ir respective owners.

iii

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.3.1 ATX Hole Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.3.2 ATX I/O Shield Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

3 AlphaPC 164SX Switch Configuration

3.1 Mini-Debugger (CF3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2 CPU Speed Selection (CF[6:4]) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.3 Fail-Safe Booter (CF7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

4 AlphaPC 164SX Connector Pinouts

4.1 PCI Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2 ISA Expansion Bus Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4.3 SDRAM DIMM Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4.4 EIDE Drive Bus Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4.5 Diskette (Floppy) Drive Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4.6 Parallel Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4.7 COM1/COM2 Serial Line Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4.8 Keyboard/Mouse Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4.9 SROM Test Data Input Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4.10 Input Power Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4.11 Enclosure Fan Power Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

iv

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 Upgrading SDRAM Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.3 Increasing Microprocessor Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3.1 Preparatory Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3.2 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3.3 Removing the 21164PC Microprocessor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5.3.4 Installing the 21164PC Microprocessor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

6 Interrupts and ISA Bus Addresses

6.1 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2 ISA I/O Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

7 Alpha SRM Console Firmware

7.1 Alpha SRM Console Firmware Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.2 Basic Alpha SRM Console Command Descriptions . . . . . . . . . . . . . . . . . . . . . . . 7-3

7.3 Environment Variables for Alpha SRM Console Commands. . . . . . . . . . . . . . . . 7-18

7.3.1 Environment Variable Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18

7.3.1.1 Architecture-Required Environment Variables . . . . . . . . . . . . . . . . . . . . 7-19

7.3.1.2 System-Defined Environment Variables. . . . . . . . . . . . . . . . . . . . . . . . . 7-20

7.4 Using the AlphaBIOS Firmware Update Utility to Update the Flash ROM . . . . . . 7-22

7.4.1 AlphaBIOS Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22

7.4.2 Starting the AlphaBIOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 -23

7.4.3 Installing Alpha SRM Console Using AlphaBIOS Setup Program. . . . . . . . . 7-24

7.5 Installing the DIGITAL UNIX Operating System . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29

7.5.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29

8 Troubleshooting

8.1 Hardware Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8.2 Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

8.3 Post Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

8.4 Fail-Safe Booter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

v

9 Battery Recycle/Disposal Informa tion

A Supporting Products

A.1 Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.2 Thermal Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

A.3 Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

A.4 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

B Associated Documentation

vi

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

5–1 Fan/Heat-Sink Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

7–1 AlphaBIOS Boot Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23

7–2 AlphaBIOS Setup Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-24

7–3 AlphaBIOS Upgrade Options Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25

7–4 AlphaBIOS Warning Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26

7–5 AlphaBIOS Upgrade SRM Console Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27

7–6 AlphaBIOS Upgrade Complete Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28

vii

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4–2 ISA Expansion Bus Connector Pinouts (J22, J23) . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4–3 SDRAM DIMM Connector Pinouts (J7 through J10). . . . . . . . . . . . . . . . . . . . . . . 4-4

4–4 EIDE Drive Bus Connector Pinouts (J5, J6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4–5 Diskette (Floppy) Drive Bus Connector Pinouts (J11). . . . . . . . . . . . . . . . . . . . . . 4-6

4–6 Parallel Bus Connector Pinouts (J13). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4–7 COM1/COM2 Serial Line Connector Pinouts (J3). . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4–8 Keyboard/Mouse Connector Pinouts (J4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4–9 SROM Test Data Input Connector Pinouts (J21) . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4–10 Input Power Connector Pinouts (J2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4–11 Enclosure Fan (+12 V dc) Power Connector Pinouts (J16) . . . . . . . . . . . . . . . . . 4-8

4–13 Soft Power Connector Pinouts (J1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

4–12 Microprocessor Fan Power Connector Pinouts (J14) . . . . . . . . . . . . . . . . . . . . . . 4-9

4–14 Multipurpose Connector Pinouts (J20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

5–1 AlphaPC 164SX SDRAM Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . . 5-2

6–1 ISA Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6–2 ISA I/O Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

7–1 AlphaBIOS Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22

8–1 Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

8–2 Post Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

About This Manual 1–1

1

About This Manual

This manual describes the AlphaPC 164SX motherboard, a board for computing
systems based on the DI GITAL Semiconductor Alpha 21164PC microprocessor and
the companion DIGITAL Semiconductor 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 Te rm inology

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 number s are decimal or hex adecima l unle ss oth erwise indic ated. I n

case of ambiguity, a subscript indicates the radix of nondecimal numbers. For
example, 19 is a decimal number, but 19

16

and 19A are hexadecimal numbers.

Extents: Extents are specified by a single number or a pair of numbers in 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 i ndu stry-st andard spe cificat ion, su ch as PCI or IDE, a re pri nted i n the
case as found in the speci ficati on (usu ally u pper case). Act ive l ow sign als ha ve eit her
a pound sign “#” appended, or a “not” overscore bar; for example, DEVSEL# and

RESET

.

1–2 About This Manual

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 The Alpha SRM Console firmware
DIGITAL UNIX installation guide The DIGITAL UNIX Installation Guide
DIGITAL UNIX The DIGITAL UNIX operating system

Features 2–1

2

Features

Table 2–1 provides an overview of the AlphaPC 164SX motherboard’s features.

Table 2–1 AlphaPC 164SX Features

Feature Description

Microprocessor DIGIT AL Semiconductor Alpha 21 164PC microprocesso r (64-bit

RISC)

Core logic chip DIGITA L Semiconductor 21174 core logic chip, comprising a

single control chip that provides an interface to system memory
and the PCI bus

Synchronous DRAM
(SDRAM) memory

32MB to 512MB memory array -- Two banks of 128-b it memory;

168-pin unbuffered SDRAM DIMMs.
Caching
L1 Icache 16KB, direct-mapped, instruction cache on the CPU chip
L1 Dcache 8KB, direct-mapped, data cache on the CPU chip
L2 backup cache Onboard 1MB, 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

• Cypress CY82C693U–NC chip with a PCI-to-ISA bridge,
PCI EIDE, keyboard, mouse, and time-of-year clock

• Two dedicated ISA expansion slots

• SMC FDC37C669 combination controller chip provides
control for diskettes, two UARTs with modem control, and
parallel port

• 1MB flash ROM

Firmware Alpha SRM Console firmware

2–2 Features

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

XU59

Q8

J1

J2

J3

J4

J5 J6

J7 J8 J9

J10

J11

J13

21164PC

U31

J14

J16

J15

J17

J18

J19

J20

J21

SW1 J22

J23

Q5

Q4

Q7

XB1

X2

X1

X3

U47

U39

21174

U33

U30

U46

U45

U25

U27

U23

U24

U17

U18

U12

U13

U7

U5

U3

U4

U1

U28

U32

U10 U11

U20 U21 U22

U48

U49

U50

U52

U51

U53

U54

U55

U40

U41 U42

U43

U44

U2

U8

U9

U6

U16

U14

U15

U19

U26

U29

U34

U35

U36

U37

U38

U56

Features 2–3

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 (+3V, +5V, -5V, +12V,

-12V)

J22 ISA slot 1

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,

U20, U22

L2 cache data SRAMs

J7 SDRAM DIMM 0 [0:63] connector U21 L2 cache tag SRAM
J8 SDRAM DIMM 1 [64:128] connector U33 DIGITAL Semiconductor 21174

core logic chip

J9 SDRAM DIMM 2 [0:63] connector U19, U26,

U29

Memory address/control buffers

J10 SDRAM DIMM 3 [64:128] connector U1, U3, U4,

U5, U7,
U12, U13,
U17, U18,
U23, U24,
U25, U27

Data switches

J11 Diskette (floppy) drive connector U40 to U43 Interrupt shift registers
J13 Parallel I/O connector U30 Flash ROM (1MB)
J14 Microprocessor fan/fan sense connector U46 PCI-ISA Bridge (CY82C693U-NC)
J15 PCI slot 3 (32-bit) U36 to U38 IDE buffers
J16 Fan power, enclosure (+12V) U47 Combination controller

(FDC37C669)

J17 PCI slot 2 (32-bit) U2, U28,

U32

Reg-reg cache isolate logic

J18 PCI slot 1 (64-bit) U31 Microprocessor, socketed

(DS Alpha 21164PC)

J19 PCI slot 0 (64-bit) U45 Microprocessor clock synthesizer

(MC12439)

2–4 Features

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.

Caution: Fan sensor required. The 21164PC microprocessor cooling fan must

drive an RPM indicator signal. If the airflow stops, the sensor on the
motherboard detects that the RPM has stopped, and resets the system.

2.2 Environmental Requirements

The 21164PC microprocessor is cooled by a small fan blowing directly into the
chip’s heat sink. The AlphaPC 164SX motherboard is designed to run efficiently by
using only this f an. Add it ion al fans may be necessa ry d epe ndi ng upon cabinetry and
the requirements of plug-in cards.

The AlphaPC 164SX motherboard is specified to run within the environment listed
in Table 2–4.

1

Values indicated are for an AlphaPC 164SX motherboard with an Alpha 21164PC microprocessor
operating at 400 MHz, with 128MB SDRAM, excluding adapter cards and disk drives.

Table 2–3 Power Supply DC Current Requirements

Voltage/Tolerance Current

1

+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

Features 2–5

Physical Paramete rs

2.3 Physical Parameters

The AlphaPC 164SX 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: 6.00 cm (2.4 in)

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)

2–6 Features

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

.650

.500

.400

4.900

1.612

.600

.625

9.600

8.950

6.100

ISA Connector
(2 Places)

PCI Connector
(4 Places)

1.300

11.100

12.000

FM-06122.AI4

Features 2–7

Physical Paramete rs

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

11.15

15.47

4.35

17.95

22.95

23.96

29.10

33.10

9.25

3.58

2.45

5.00 TYP

R 1.00

21.36

16.05

68.4

64.9

24.7

16.7

35.5

43.5

74.8

78.2

85.4

87.2

94.4

98.9

64.91

60.26

51.27

42.28

40.48

34.13

25.14

16.15

14.35

8.00

0.99

9.98

11.78

18.13

19.93

28.92

37.91

44.26

46.06

55.05

64.04

70.39

72.19

81.18

90.17

95.40

14.96

R 1.00

7.19 TYP

FM-05986.AI4

AlphaPC 164SX Switch Configuration 3–1

3

AlphaPC 164SX Switch Configuration

The AlphaPC 164SX motherboard has a switchpack located at SW1, as shown

previously in Figure 2–1. These swit che s set the hardware conf iguration. Figure 3–1
shows these switch config ura ti ons.

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 Mini­Debugger after all initialization is complete, but before starting the execution of the
system flash ROM code.

3.2 CPU Speed Selection (CF[6:4])

The clock synthesizer at U45 makes it possible to change the frequency of the
microprocessor’s clock output. The switch configuration is set in SW1, CF[6:4].
These three switches set the speed at power-up as listed in Figure 3–1. The
microprocessor frequency divided by the ratio determines the system clock
frequency.

3.3 Fail-Safe Booter (CF7)

The fail-safe booter provides an emergency recovery mechanism when the primary
firmware image cont ai ned in flash memory has bee n c orr upt ed. When flash memory
has been corrupted, and no image can be loaded safely from the flash, you can run
the fail-safe booter and boot another image from a diskette that is capable of repro­gramming the flash.

Refer to Se ction 8.4 for mo re information .

3–2 AlphaPC 164SX Switch Configuration

Fail-Safe Booter (CF7)

Figure 3–1 AlphaPC 164SX Configuration Switches

CF Bit: 400 MHz 533 MHz

41 1
51 0
61 1

CF0
CF1
CF2
CF3

CF4
CF5
CF6
CF7

01

Reserved.

Fail-Safe Booter: 0: Fail Safe

1: Alpha SRM Console

Note:

All other combinations
are reserved.

Note: Switch defaults are in bold.

Reserved. This must remain CF0=1, CF1=0.

Mini-Debugger: 0 enables Mini-Debugger

1 disables Mini-Debugger

AlphaPC 164SX Connector Pinouts 4–1

4

AlphaPC 164SX Connector Pinouts

This chapter lists the pinouts of the AlphaPC 164SX connectors (see Table 4–1
through Table 4–14). 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

(Sheet 1 of 2)

Pin Signal Pin Signal Pin Signal Pin Signal
32-Bit and 64-Bit PCI Connectors (J15, J17, J18, J19)

A1 TRST# A2 +12V A3 TMS A4 TDI
A5 Vdd A6 INTA A7 INTC A8 Vdd
A9 —A10Vdd A11 — A12 Gnd

A13 Gnd A14 — A15 RST# A16 Vdd
A17 GNT# A18 Gnd A19 — A20 AD[30]
A21 +3V A22 AD[28] A23 AD[26] A24 Gnd
A25 AD[24] A26 IDSEL A27 +3V A28 AD[22]
A29 AD[20] A30 Gnd A31 AD[18] A32 AD[16]
A33 +3V A34 FRAME# A35 Gnd A36 TRDY#
A37 STOP# A38 STOP# A39 +3V A40 SDONE
A41 SBO# A42 Gnd A43 PAR A44 AD[15]
A45 +3V A46 AD[13] A47 AD[11] A48 Gnd
A49 AD[09] A50 Not used A51 Not used A52 C/BE#[0]
A53 +3V A54 AD[06] A55 AD[04] A56 Gnd
A57 AD[02] A58 AD[00] A59 Vdd A60 REQ64#
A61 Vdd A62 Vdd B1 -12V B2 TCK
B3 Gnd B4 TDO B5 Vdd B6 Vdd
B7 INTB B8 INTD B9 PRSNT1# B10 —

4–2 AlphaPC 164SX Connector Pinouts

PCI Bus Connector Pinouts

B11 PRSNT2# B12 Gnd B13 Gnd B14 —
B15 Gnd B16 CLK B17 Gnd B18 REQ#
B19 Vdd B20 AD[31] B21 AD[29] B22 Gnd
B23 AD[27] B24 AD[25] B25 +3V B26 C/BE#[3]
B27 AD[23] B28 Gnd B29 AD[21] B30 AD[19]
B31 +3V B32 AD[17] B33 C/BE#[2] B34 Gnd
B35 IRDY# B36 +3V B37 DEVSEL# B38 Gnd
B39 LOCK# B40 PERR# B41 +3V B42 SERR#
B43 +3V B44 C/BE#[1] B45 AD[14] B46 Gnd
B47 AD[12] B48 AD[10] B49 Gnd B50 Not used
B51 Not used B52 AD[08] B53 AD[07] B54 +3V
B55 AD[05] B56 AD[03] B57 Gnd B58 AD[01]
B59 Vdd B60 ACK64# B61 Vdd B62 Vdd

64-Bit PCI Connectors Only (J18, J19)

A63 Gnd A64 C/BE#[7] A65 C/BE#[5] A66 Vdd
A67 PAR64 A68 D[62] A69 Gnd A70 D[60]
A71 D[58] A72 Gnd A73 D[56] A74 D[54]
A75 Vdd A76 D[52] A77 D[50] A78 Gnd
A79 D[48] A80 D[46] A81 Gnd A82 D[44]
A83 D[42] A84 Vdd A85 D[40] A86 D[38]
A87 Gnd A88 D[36] A89 D[34] A90 Gnd
A91 D[32] A92 — A93 Gnd A94 —
B63 — B64 Gnd B65 C/BE#[6] B66 C/BE#[4]
B67 Gnd B68 D[63] B69 D[61] B70 Vdd
B71 D[59] B72 D[57] B73 Gnd B74 D[55]
B75 D[53] B76 Gnd B77 D[51] B78 D[49]
B79 Vdd B80 D[47] B81 D[45] B82 Gnd
B83 D[43] B84 D[41] B85 Gnd B86 D[39]
B87 D[37] B88 Vdd B89 D[35] B90 D[33]
B91 Gnd B92 — B93 — B94 Gnd

Table 4–1 PCI Bus Connector Pinouts

(Sheet 2 of 2)

Pin Signal Pin Signal Pin Signal Pin Signal

AlphaPC 164SX Connector Pinouts 4–3

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 (J22, J23)

Pin Signal Pin Signal Pin Signal Pin Signal

1 Gnd 2 IOCHCK# 3 RSTDRV 4 SD7
5 Vdd 6 SD6 7 IRQ9 8 SD5
9 –5V 10 SD4 11 DRQ2 12 SD3
13 –12V 14 SD2 15 ZEROWS# 16 SD1
17 +12V 18 SD0 19 Gnd 20 IOCHRDY
21 SMEMW# 22 AEN 23 SMEMR# 24 SA19
25 IOW# 26 SA18 27 IOR# 28 SA17
29 DACK3# 30 SA16 31 DRQ3 32 SA15
33 DACK1# 34 SA14 35 DRQ1 36 SA13
37 REFRESH# 38 SA12 39 SYSCLK 40 SA11
41 IRQ7 42 SA10 43 IRQ6 44 SA9
45 IRQ5 46 SA8 47 IRQ4 48 SA7
49 IRQ3 50 SA6 51 DACK2# 52 SA5
53 TC 54 SA4 55 BALE 56 SA3
57 Vdd 58 SA2 59 OSC 60 SA1
61 Gnd 62 SA0 63 MEMCS16# 64 SBHE#
65 IOCS16# 66 LA23 67 IRQ10 68 LA22
69 IRQ11 70 LA21 71 IRQ12 72 LA20
73 IRQ15 74 LA19 75 IRQ14 76 LA18
77 DACK0# 78 LA17 79 DRQ0 80 MEMR#
81 DACK5# 82 MEMW# 83 DRQ5 84 SD8
85 DACK6# 86 SD9 87 DRQ6 88 SD10
89 DACK7# 90 SD11 91 DRQ7 92 SD12
93 Vdd 94 SD13 95 MASTER# 96 SD14
97 Gnd 98 SD15 —— ——

4–4 AlphaPC 164SX Connector Pinouts

SDRAM DIMM Connector Pinouts

4.3 SDRAM DIMM Connector Pinouts

Ta ble 4–3 shows the SDRAM DIMM connector pins.

Table 4–3 SDRAM DIMM Connector Pinouts (J7 through J10)1

(Sheet 1 of 2)

Pin Signal Pin Signal Pin Signal Pin Signal

1 Gnd 2 DQ0 3 DQ1 4 DQ2
5 DQ3 6 +3V 7 DQ4 8 DQ5
9 DQ6 10 DQ7 11 DQ8 12 Gnd
13 DQ9 14 DQ10 15 DQ11 16 DQ12
17 DQ13 18 +3V 19 DQ14 20 DQ15
21 CB0 22 CB1 23 Gnd 24 NC
25 NC 26 +3V 27 WE

28 DQMB0

29 DQMB1 30 S0

31 NC 32 Gnd
33 A0 34 A2 35 A4 36 A6
37 A8 38 A10 39 A12 40 +3V
41 +3V 42 CK0 43 Gnd 44 NC
45 S2

46 DQMB2 47 DQMB3 48 NC
49 +3V 50 NC 51 NC 52 CB2
53 CB3 54 Gnd 55 DQ16 56 DQ17
57 DQ18 58 DQ19 59 +3V 60 DQ20
61 NC 62 NC 63 CKE1 64 Gnd
65 DQ21 66 DQ22 67 DQ23 68 Gnd
69 DQ24 70 DQ25 71 DQ26 72 DQ27
73 +3V 74 DQ28 75 DQ29 76 DQ30
77 DQ31 78 Gnd 79 CK2 80 NC
81 NC 82 SDA 83 SCL 84 +3V
85 Gnd 86 DQ32 87 DQ33 88 DQ34
89 DQ35 90 +3V 91 DQ36 92 DQ37
93 DQ38 94 DQ39 95 DQ40 96 Gnd
97 DQ41 98 DQ42 99 DQ43 100 DQ44
101 DQ45 102 +3V 103 DQ46 104 DQ47
105 CB4 106 CB5 107 Gnd 108 NC
109 NC 110 +3V 111 CAS

112 DQMB4

113 DQMB5 114 S1 115 RAS

116 Gnd
117 A1 118 A3 119 A5 120 A7
121 A9 122 BA0 123 A13 124 +3V