Alpha Microsystems Eagle 100 User manual

DSS-10517-00, B01
Eagle Computer
Service Manual
For Authorized
Service Personnel Only
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© 1998 ALPHA MICROSYSTEMS
FIRST EDITION: July 1998
To re-order this document, request part number DSS-10517-00.
FCC Notice
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own
expense.
Canadian Department of Communications Compliance Statement
This equipment does not exceed Class A limits per radio noise emissions for digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications. Operation in a residential area may cause unacceptable interference
to radio and TV reception requiring the owner or operator to take whatever steps are necessary to correct the interference.
Avis de Conformité aux Normes du Ministère des Communications du Canada
Cet équipment ne deapsse pas les limits de Classe A d’émission de bruits radioélectriques pour les appareils numeriques tels que
prescrites par le Règlement sur le brouillage radioélectrique établi par le ministère des Communications du Canada. L’exploitation
faite en milleu résidential peut entrainer le brouillage des réceptions radio et tele, ce qui obligerait le propriétaire ou l’opératour à
pendre les dispositions nécessaires pour en éliminer les causes.
Battery Warning
CAUTION: Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by
the manufacturer. Discard used batteries according to the manufacturer’s instructions.
ATTENTION: Il y a danger d’explosion s’il y a replacement incorrect de la batterie. Remplacer uniquement avec une batterie du
même type ou d’un type recommandé par le constructeur. Mettre au rébut les batteries usagées conformément aux instructions du
fabricant.
For AM-3500-E100, -E200, -E300, -E400, -E500 and AM-990-01 systems replace battery with Panasonic or Ray-O-Vac BR2325
only. For AM-3500-E550, AM-3500-6000, and AM-990-04 systems, replace batteries with Panasonic or Ray-O-Vac BR1225 only.
Use of other batteries may present a risk of fire or explosion. Replacement batteries may be ordered from your authorized Alpha
Micro reseller.
Safety Warning
This computer contains no user-configurable components that require opening the computer case. Because the power supply in
this computer is capable of outputting high current levels hazardous to your safety, the computer case should only be opened by an
authorized service technician.
Cet ordinateur ne contient aucune pièce configurable par l’utilisateur qui nécessite l’ouverture du boitier. L’alimentation de cet
ordinateur peut preduire des nivaeux de tensions dangereux, le boitier ne devrait donc être ouvert que par un technician autoriaé.
SOFTWARE SECURITY DEVICE IDENTIFICATION NUMBER: _________________
The Alpha Micro Software Security Device (SSD) is a customized integrated circuit that personalizes the computer, providing
identity verification for it. Certain Alpha Micro and non-Alpha Micro software may require that your computer contain an SSD in
order to run software that has been customized to run only on your computer.
Please enter the identification of your SSD above. The SSD identification number should be on your computer ID label under “SSD
Serial No.” (Another way of finding the number is to look at the SSD itself. The SSD is located in an integrated circuit location on
the CPU board; its identification number is printed on the SSD itself.) Software vendors may ask you for the SSD number if they are
customizing software to run only on your computer.
This document may contain references to products covered under the following U.S. Patent Number(s): 4,530,048
ALPHA MICROSYSTEMS
2722 Fairview Street
P.O. Box 25059
Santa Ana, CA 92704

DSS-10517-00, Rev. B01
Table of Contents
INTRODUCTION 1
EAGLE SERIES COMPUTERS 1
ACCESSING YOUR COMPUTER 2
Electronic Equipment Handling Precautions 3
HARDWARE CONFIGURABLE OPTIONS 4
Printed Circuit Board Configuration 4
AM-137 Board Configuration 5
AM-319(-00) Board Configuration 7
AM-319(-10) Board Configuration 8
AM-319(-20) Board Configuration 9
Remote Reset Capability 10
Boot ID Configuration Switch 10
Replacing the Time and Date Battery 10
SSD Chip and Boot PROM Handling 12
Roadrunner AM-172 Board Configuration 13
Roadrunner AM-174 Board Configuration 14
ACCESSING YOUR ROADRUNNER BOARD 15
UPGRADING ROADRUNNER ON-BOARD MEMORY 18
Installing Memory 18
PERIPHERAL MOUNTING 19
Eagle 100-500 Rear Panel Screws 21
Eagle 550 Rear Panel Screws 22
Side Mounting Bracket Removal - All Eagles 23
X-Bus Cable Routing 24

Eagle Series Computer Service Manual Page 1
DSS-10517-00, Rev. B01
INTRODUCTION
The instructions in this document are intended only for authorized service personnel. Eagle series
computers contain a high-output power supply, which produces current levels high enough to
make it unsafe for unauthorized persons to perform work inside the chassis.
Note: This document describes the Eagle Series computer packaged in the standard Eagle enclosure. For
information on the AM-990 packaging option, consult the AM-990 SBC Service Manual, part number
DSS-10524-00.
The following procedures are discussed:
• Removing your computer’s top cover.
• Electronic equipment handling precautions.
• Printed circuit board configuration options.
• Installing memory.
• Peripheral installation.
EAGLE SERIES COMPUTERS
The instructions in this document are applicable to all computers in the Eagle Series. There are three
basic models that make up the Eagle series: the 100, 300, and 550. There are also the 400 and 500
models, which are more powerful variations of the Eagle 300 computer. Here’s a brief introduction to
the Eagle series lineup:
Eagle 100 A single board computer based on a main electronics board called the AM-137. The
AM-137 board includes all the circuitry found on Alpha Micro’s AM-172 Roadrunner
board.
Eagle 300 Based on the DWB-00319-00 board; can be ordered with either an AM-172 or AM-174
Roadrunner board.
Eagle 400 Created by installing an AM-174 66MHz Roadrunner board into an 300 computer.
Eagle 500 Created by installing an AM-174 80MHz Roadrunner into an Eagle 300 computer.
Eagle 550 Based on the DWB-00319-20 board; can be ordered with the Roadrunner AM-174
80MHZ Roadrunner board.

Page 2 Eagle Series Computer Service Manual
DSS-10517-00, Rev. B01
ACCESSING YOUR COMPUTER
For hardware information on the AM-990 chassis consult the AM-990 SBC Service Manual, part
number DSS-10524-00.
When adding additional equipment or servicing your computer, you need to remove your computer’s top
cover. The top cover is held in place with four Phillips-head screws located on the computer’s rear panel.
To remove the top cover, remove the four screws from the locations indicated in the illustration below.
Once the screws have been removed, slide back and remove the top cover.
The screw locations and cover removal procedure for the “Super Eagle” (Eagle 550) chassis is
identical to the standard Eagle chassis shown in the following two illustrations.
115
SCSI
MAIN
ALT
BOOT
TOP COVER SCREWS
A1 A2
B1 B2
C1 C2
D1 D2
F1 F2
G1 G2
H1 H2
PARALLEL 1PARALLEL 0
ETHERNET
ENET
E1 E2
Eagle Top Cover Screws

Eagle Series Computer Service Manual Page 3
DSS-10517-00, Rev. B01
Eagle Top Cover Removal
Electronic Equipment Handling Precautions
With the AC power cord unplugged and the top cover removed, the components inside your computer
are vulnerable to damage caused by static discharge. Your body and clothing are capable of storing an
electrical charge that can damage or destroy unprotected electronic components. Before handling any
computer hardware, make sure your work area is properly protected against static discharge. There are a
number of commercially available static protection devices, like the wrist strap shown below, designed
specifically to protect your equipment from harmful static discharge.

Page 4 Eagle Series Computer Service Manual
DSS-10517-00, Rev. B01
Static Protection Wrist Strap
HARDWARE CONFIGURABLE OPTIONS
The following sections summarize the configuration options available to let you tailor your hardware to
your needs. Most of these options require gaining access to the main circuit boards within the computer,
and therefore, should be attempted only by qualified technical personnel. Contact your VAR if you
require assistance in this area.
Printed Circuit Board Configuration
The next few sections contain configuration information for the following boards:
AM-137
The Eagle 100 is a single board computer based on a main electronics board called the AM-137. The
AM-137 board includes all the circuitry found on Alpha Micro’s AM-172 Roadrunner board; it also
includes eight on-board DB9 RS232 serial ports, one additional I/O expansion connector, one IDE
(Integrated Device Electronics) disk drive interface connector, one SIMM memory connector, one
parallel port, and an SSD chip.

Eagle Series Computer Service Manual Page 5
DSS-10517-00, Rev. B01
AM-319(-00)
The AM-319(-00) board is used with either an AM-172 or AM-174 Roadrunner board in the Eagle 300-
500 computers. The AM-319 board supports all the I/O ports used to communicate with printers,
terminals, networks, etc. It also contains your computer’s SSD chip and the boot configuration switches.
AM-319(-10)
The AM-319(-10) board is used with either an AM-172 or AM-174 Roadrunner board in the Eagle 200
computer. The AM-319(-10) board supports all the I/O ports used to communicate with printers,
terminals, etc. It also contains your computer’s SSD chip and the boot configuration switches.
AM-319(-20)
The AM-319(-20) board is used in with an AM-174 Roadrunner board in the Eagle 550 computer. The
AM-319(-20) board supports all the I/O ports used to communicate with printers, terminals, networks,
etc. It also contains your computer’s SSD chip and other I/O related circuitry.
AM-172
The (Roadrunner) AM-172 board contains a 68030 CPU chip, one 50-pin SCSI connector, one boot
PROM, and all of your computer’s on-board memory.
AM-174
The (Roadrunner) AM-174 board contains a 68040 CPU chip, one 50-pin SCSI connector, one boot
PROM, and all of your computer’s on-board memory.
AM-137 Board Configuration
The illustration below shows the AM-137 board configured as shipped by Alpha Micro. There are only
two user-configurable jumpers on this board: the W2 Remote Reset jumper and the W7 Memory
Configuration jumpers. All other jumpers should be left in their factory-configured positions. All
possible configurations for jumpers W2 and W7 are shown in the illustration.

Page 6 Eagle Series Computer Service Manual
DSS-10517-00, Rev. B01
BATTERY
PARALLEL PORT
J1
W1
BOOT CONFIGURATION
SWITCH
J5J4
J2 J3
ALPHA MICROSYSTEMS
W4
W5
J8 J9
J6
J7
W10
J11
W11
J10
W13
W14
W7
POWER
RUN
DISK
W8
W12
W9
W6
030
FOUR ON-BOARD (4-7)
RS232 SERIAL PORTS
FOUR ON-BOARD (0-3)
RS232 SERIAL PORTS
POWER
CONNECTOR
OSCILLATOR JUMPERS
DO NOT REMOVE
IDE INTERFACE
SCSI INTERFACE
I/O EXPANSION—SUPPORTS AM-318,
AM-318-10,ANDAM-314 SERIALI/O BOARDS,
AND THEAM-366 ETHERNET BOARD
MEMORY CONNECTOR
CONNECTOR FOR AM-219
DISKETTE CONTROLLER
DISPLAY
PANEL
SSD
PIN-1
W3
RESET SWITCH
W2
W2 "IN" = REMOTE RESET ENABLED
W2 "OUT" = REMOTE RESET DISABLED (DEFAULT)
ACTIVE SCSI
TERMINATION
W6
W6
ENABLE
DISABLE
W7 W7 W7 W7
4MB 8MB 16MB 32MB
MEMORY CONFIGURATION
FACTORY
USE ONLY
AM-137
U28 U29
U14 U15
AM-137 Board Configuration

Eagle Series Computer Service Manual Page 7
DSS-10517-00, Rev. B01
AM-319(-00) Board Configuration
The illustration below shows the AM-319-00 board configured as shipped by Alpha Micro. There are
only two user-configurable jumpers on this board, the W7 Remote Reset jumper and the W10 Ethernet
Media Configuration jumper. All other jumpers should be left in their factory-configured positions. All
possible configurations for jumpers W7 and W10 are shown in the illustration.
PARALLEL PORT 1
J10 J9 J8
ALPHA MICROSYSTEMS
J14
J2 J1
J3
BATTERY
J5 J6
J11
J7
W5
J15
J12
J13
PARALLEL PORT 0
ETHERNET 15-PIN
A.U.I. PORT
BOOT CONFIGURATION
SWITCH
ETHERNET 10Base-T
PORT
X-BUS CONNECTORS
POWER SUPPLY
CONNECTORS
DISPLAY PANEL
CONNECTOR
AM-314 / 318 / 318-10
SERIAL I/O EXPANSION
CONNECTOR FOR AM-219
DISKETTE CONTROLLER
W3
W1
W6
W9
W7
W10
ETHERNET MEDIA
CONFIGURATION JUMPER
= ETHERNETA.U.I. CONNECTOR ENABLED
= ETHERNET 10Base-T CONNECTOR ENABLED
SPEAKER CONNECTOR
REMOTE RESET JUMPER
W7
W7 = REMOTE RESET DISABLED
= REMOTE RESET ENABLED
W10
W10
OSCILLATOR JUMPERS
(DO NOT REMOVE)
INDICATES PIN-1
FOR ALL CONNECTORS
SSD
CHIP
PIN-1
U6
AM-319(-00) Board Configuration

Page 8 Eagle Series Computer Service Manual
DSS-10517-00, Rev. B01
AM-319(-10) Board Configuration
The illustration below shows the AM-319(-10) board configured as shipped by Alpha Micro. There is
only one user-configurable jumper on this board, the W3 Remote Reset jumper. All other jumpers should
be left in their factory-configured positions. All possible configurations for jumper W3 are shown in the
illustration.
PARALLEL PORT
J6
ALPHA MICROSYSTEMS AM-319 (-10)
J1
J3 J5
J8 J9
W9
J10
BOOT CONFIGURATION
SWITCH
X-BUS CONNECTORS
POWER SUPPLY
CONNECTORS
DISPLAY PANEL
CONNECTOR
AM-314 / 318 / 318-10
SERIAL I/O EXPANSION
CONNECTOR FOR AM-219
DISKETTE CONTROLLER
W6
W5
OSCILLATOR JUMPERS
(DO NOT REMOVE)
INDICATES PIN-1
FOR ALL CONNECTORS
J7
BATTERY
J2
J4
W8
W7
The J7 I/O expansion slot will also
support theAM-366 Ethernet board.
w1 w2 w3 w4
IDE INTERFACE
CONNECTOR
W1 W2
W3
W4
DISK LED
POWER LED
CPU ACTIVITY LED
REMOTE RESET W3 INSTALLED = REMOTE RESET ENABLED
W3 REMOVED = REMOTE RESET DISABLED (DEFAULT)
FACTORY USE
ONLY
RESET BUTTON
SSD
CHIP
PIN-1
U2
U3
AM-319(-10) Board Configuration

Eagle Series Computer Service Manual Page 9
DSS-10517-00, Rev. B01
AM-319(-20) Board Configuration
The illustration below shows the AM-319(-20) board configured as shipped by Alpha Micro. There is
only one-user configurable jumper on this board, the JP7 Remote Reset jumper. All other jumpers should
be left in their factory-configured positions.
PORT 0 PORT 1 PORT 2 PORT 3 J3 UPS PORT J2
J4
J1
D3
D1
D2 LNK
RX
TX
SHLD/LOGC
GND
F1
JP1
T1
T2
JP3
OSC
+5
+5
- 5
G
G
+5
+5
-12
G
G
+5
+5
+5
+12
PG
J5 J6
RESET
A CHANNEL B CHANNEL
P3 P6
P2 P5
P4
P1
LPT1 LPT0
LPT2
LPT3
JP5
32
JP4 OSC
ALPHA MICROSYSTEMS AM319-20
G
G
G
J7
P9 FLOPPY
P8
P7
ADDRESS/DATA
CONTROL/STATUS
DISCON
JP6
JP5A
OSC
16
U57
SUPER EAGLE
+
+
SPARE
SSD
U73
REM RESET
JP7
P10
U80
P11
P12
JP8 JP9
RUN DISK JP10
PWR
AM-219
RJ-45 SERIAL PORTS ETHERNET PORTS
TPI AUI
ACTIVITY LEDS
BUS
CLOCK-
DO NOT
CHANGE!
SIO EXP
X-BUS
990
DISPLAY
PANEL
EAGLE
DISPLAY
PANEL
ALPHA MICRO
USE ONLY! TOD
BATTERY
BACKUP
UPS INTERFACE
PIO
PORTS
DC
POWER
990/AUX
DC
POWER
AM-219
INTFC
REMOTE RESET
* OUT = DISABLE
IN = ENABLE
* FACTORY SET
FUTURE
OPTION-
DO NOT
REMOVE!
AM-319-20
AM-319(-20) Board Configuration

Page 10 Eagle Series Computer Service Manual
DSS-10517-00, Rev. B01
Remote Reset Capability
The remote reset option jumper is shown in the AM-137, AM-319(-00), AM-319(-10), and AM-319(-20)
illustrations. When remote reset is enabled, you can reset your computer via the terminal cable attached
to serial port #0. This is done by connecting a push-button switch between pin-1 and pin-7 (signal
ground) at the terminal end of the cable. When remote reset is enabled by installing the appropriate
jumper, pressing the switch will short pin-1 and pin-7 together and the computer will reset.
You can also enable remote reset by using the remote reset cable, DWB-10323-00, available from
Alpha Microsystems. This works even if port 0 is on an AM-314 or AM-318-10 board, which do
not support remote reset through port 0, as described above. See PDI-10323-00, Remote Reset
Adapter, for details.
Boot ID Configuration Switch
The boot ID switches are shown in the AM-137, AM-319(-00), and AM-319(-10) illustrations. Complete
information for configuring the boot switches can be found in Chapter 2 of the Eagle Series Computer
Owner’s Manual, DSO-00196-00, Rev. 03 or later.
The boot configuration on the AM-319(-20) board is programmable; therefore there are no boot ID
switches on the board. See the AM-319(-20) CMOS Setup section of the Eagle Series Computer Owner’s
Manual for a detailed explanation of the Super Eagle CMOS Configuration Menu.
Replacing the Time and Date Battery
When replacing the backup batteries always be sure to power-down the system first! DO NOT
replace batteries while the system is running!
The location of the backup battery that provides power to your time and date circuit is shown in the AM-
137, AM-319(-00), AM-319(-10) and AM-319(-20) illustrations. There are two types of battery
configurations, depending on board type:
AM-137, AM-319(-00) and AM-319(-10) Battery Replacement
Each board uses one three-volt lithium battery (part #BR2325) that will last for approximately two years.
To remove the existing battery, which is about the size of a quarter, you must slide it out from under the
top spring contact. It may be necessary to lift the top spring contact slightly to remove the battery from
the plastic well that holds it in place. Do not bend the spring arm, or you will lose the contact tension
and the battery backup will be intermittent.
When installing the new battery, make sure the positive (+) side is facing up and the top spring arm
contact is pressing down firmly to hold it in place.
After installing a new battery, log to OPR: and enter the current time and date. Reboot the system to
initialize system up time.

Eagle Series Computer Service Manual Page 11
DSS-10517-00, Rev. B01
AM-319(-20) Battery Replacement
The AM-319(-20) board uses two three-volt lithium batteries (part #BR1225). The batteries are slightly
smaller than a dime, and are secured side-by-side in a plastic holder. When the batteries need
replacement, you must replace both batteries at the same time. Refer to the following steps and
illustration for battery replacement.
Use extreme care when replacing the batteries! The plastic holder can be easily broken if you
use excessive force!
1. Insert a small scribe or Xacto™ knife from the top, down through the square hole between the
right edge of the battery and the plastic holder’s top piece. (The right side is the side toward
resistor pack RN12).
2. Gently pry the right side of the battery so it slides to the left and pushes against the left side
spring contacts.
3. As you slide the battery to the left and it clears the plastic top hole, pry the right edge of the
battery upward and out through the hole in the top. The battery will typically “pop” up and out.
+
+
U80 RN12
+
+
U80 RN12
AM-319(-20) Backup Battery Removal
4. Inspect the battery contacts and be sure they are clean before installing the new batteries. Use
alcohol and a cotton swab to clean if necessary.
5. To install a new battery, insert the edge of the battery down through the square hole and under
the left side of the plastic top. Be sure to install the new batteries with the (+) positive side up.
6. Use your finger to slide the battery to the left and down, until the right edge of the battery slips
under the right side of the plastic top. Release the battery and it should spring to the right,
securing itself under the holder’s top piece.

Page 12 Eagle Series Computer Service Manual
DSS-10517-00, Rev. B01
The battery backup on the AM-319(-20) also maintains the boot routine data stored in its on-
board CMOS chip. After you install the new batteries and boot the system, the front panel may
display a blinking “CE” for several seconds, indicating a CMOS checksum verification failure. If
this occurs, the boot routine will next display “CC” while testing the CMOS RAM to ensure it is
working properly. If the circuitry is working correctly the front panel will display “CS” and you
will have approximately 3 seconds to press ESC and access the CMOS configuration menu.
If your previously stored CMOS boot parameters have been lost and you do not access the
CMOS configuration menu to restore them, the system will drop into a standard default boot
routine looking first for a warm-boot streamer tape on SCSI device ID 3, and then for
AMOS32.MON and AMOS32.INI on SCSI disk drive 0.
For more details on setting up the CMOS Configuration Menu refer to the Eagle Series
Computer Owner’s Manual, DSO-00196-00, Rev. 03 or later.
Once the system is up and running, log to OPR: and enter the current time and date. Reboot the system to
initialize system up time.
SSD Chip and Boot PROM Handling
The type of socket used for boot PROM and SSD chips in your Eagle computer requires a special tool for
chip removal. See the illustration below for more information:
The SSD chip on the AM-137
and all AM-319 boards and
the boot PROM on
Roadrunner boards
require a specialized tool
for their removal. If you
try to remove the SSD
chip or boot PROM
using a screwdriver or
pocketknife, you could
easily damage both the
chip and the socket. This
type of chip extraction tool is
available at retail stores
specializing in electronic
components.
WARNING!
SSD and Boot PROM Removal

Eagle Series Computer Service Manual Page 13
DSS-10517-00, Rev. B01
Roadrunner AM-172 Board Configuration
The illustration below shows the AM-172 board configured as shipped by Alpha Micro. The only user-
configurable jumpers on this board are the JP5 and JP6 memory configuration jumpers. These jumpers
only need to be reconfigured if you change the amount of memory installed in your computer. All other
jumpers on the board should be left in their factory-configured positions. All possible configurations for
the memory jumpers are shown in the illustration.
NCR
030
ALPHA
MICROSYSTEMS
DWB-00172-00 REV. XXX
JP4
JP16
JP15
JP17 JP18
JP3
JP1 JP2
J2 J3
J5 J6
J1
JP1
1
2
3
JP1 SET TO PINS 1 AND 2 = TERMPOWER DISABLED
JP1 SET TO PINS 2 AND 3 = TERMPOWER ENABLED (FACTORY DEFAULT)
JP2
JP2 SET TO PINS 1 AND 2 = SCSI BUS ACTIVE TERMINATION ENABLED (FACTORY DEFAULT)
JP2 SET TO PINS 2 AND 3 = SCSI BUS ACTIVE TERMINATION DISABLED
123
JP6
JP5
JP19
JP6
JP5
JP6
JP5
JP6
JP5
4MB 8MB 16MB
MEMORY CONFIGURATION
JUMPERS
OSCILLATOR JUMPER (DO NOT REMOVE)
CACHE ENABLE / DISABLE JUMPER
IN = DISABLED
OUT = ENABLED (FACTORY DEFAULT)
TEST JUMPER (DO NOT INSTALL)
OSCILLATOR JUMPERS
(DO NOT REMOVE)
TEST JUMPER
(DO NOT INSTALL)
X-BUS
CONNECTORS
50-PIN SCSI
CONNECTOR BOOT PROM
MEMORY SIMM CONNECTOR
X-BUS ACTIVE TERMINATION
IN = ENABLED (FACTORY DEFAULT)
OUT = DISABLED
INDICATES PIN-1
FOR ALL CONNECTORS
JP6
JP5
32MB
PIN-1 INDICATOR
AM-172 Board Configuration

Page 14 Eagle Series Computer Service Manual
DSS-10517-00, Rev. B01
Roadrunner AM-174 Board Configuration
The illustration below shows the AM-174 board configured as shipped by Alpha Micro. The only user-
configurable jumpers on this board are the JP11, JP12, and JP13 memory configuration jumpers. These
jumpers only need to be reconfigured if you change the amount of memory installed in your computer.
All other jumpers on the board should be left in their factory-configured positions. All possible
configurations for the memory jumpers are shown in the illustration.
NCR
ALPHA
MICROSYSTEMS
ALPHA MICROSYSTEMS AM-174
JP7
JP2 JP1
J1
J2 J3
J4
JP17
JP9
JP10
040
JP6
JP13JP11JP12
JP1
1
2
3
JP2 SET TO PINS 1 AND 2 = TERMPOWER DISABLED
JP2 SET TO PINS 2 AND 3 = TERMPOWER ENABLED (FACTORY DEFAULT)
JP1 SET TO PINS 1 AND 2 = SCSI BUS ACTIVE TERMINATION ENABLED (FACTORY DEFAULT)
JP1 SET TO PINS 2 AND 3 = SCSI BUS ACTIVE TERMINATION DISABLED
OSCILLATOR JUMPER (DO NOT REMOVE)
OSCILLATOR JUMPERS
(DO NOT REMOVE OR RECONFIGURE)
X-BUS
CONNECTORS
50-PIN SCSI
CONNECTOR
BOOT PROM
MEMORY SIMM CONNECTOR
X-BUS ACTIVE TERMINATION
PIN-1 INDICATOR
JP13JP11JP12
4MB 8MB 16MB 32MB 64MB
JP13JP11JP12 JP13JP11JP12 JP13JP11JP12 JP13JP11JP12
MEMORY CONFIGURATION JUMPERS
JP2
1
2
3
INDICATES PIN-1
FOR ALL CONNECTORS
FACTORY USE ONLY, NO JUMPERS INSTALLED
IN = ENABLED (FACTORY DEFAULT)
OUT = DISABLED
JP16
JP14 JP15
AM-174 Board Configuration

Eagle Series Computer Service Manual Page 15
DSS-10517-00, Rev. B01
ACCESSING YOUR ROADRUNNER BOARD
Where your Roadrunner board is located in your Eagle chassis depends on when you purchased your
computer. On early-model Eagle computers, the Roadrunner board is mounted vertically on a special
bracket as shown in the next two illustrations. Later model Eagle computers have their Roadrunner
boards mounted horizontally on the chassis bottom, as shown in the third illustration. The screen on the
bottom of the chassis has four threaded standoffs designed to the hold the Roadrunner board in place.
The Eagle 100 has the Roadrunner AM-172 “030” board circuitry incorporated into its AM-137
CPU board. To upgrade the Eagle 100 to a Roadrunner “040”, you will need an AM-987 upgrade
kit.
DWF-20754-00
or
DWF-20754-01
Your Roadrunner 030 or 040 board is mounted
on the DWF-20754-00 bracket shown above.
To access the board, remove these four
Phillips-head screws.You can then fold down
the mounting bracket and board assembly
onto your work surface.
Roadrunner Mounting Bracket (Early Models & Eagle 100 Upgrades)

Page 16 Eagle Series Computer Service Manual
DSS-10517-00, Rev. B01
ROADRUNNER 030 OR 040
BOARD
When upgrading or replacing your Roadrunner
board, you must first unplug the two cables from
the X-Bus connectors, the 50-pin SCSI cable,
and the 4-pin power cable.After unplugging the
cables, simply remove the four screws shown
above and you can remove the Roadrunner board
from the assembly.
Roadrunner Installation (Early Models & Eagle 100 Upgrades)

Eagle Series Computer Service Manual Page 17
DSS-10517-00, Rev. B01
In this configuration, the Roadrunner board is
mounted on top of four standoffs which are
attached directly to the screen on the bottom
of the chassis.
6-32 PHILLIPS-HEAD
SCREW
Roadrunner Installation (Late Model Eagle Computers)