Data General Service ECLIPSE MV/7800 User manual

Data General Service, Inc.
A Subsidiary of Data General Corporation
PRODUCT INFORMATION PACKAGE
ECLIPSE MV/7800 COMPUTER
Model 8883
ECLIPSE MV/7 800-C COMPUTER
Models 8884, 8885
043-003621-00
•
DGC CONFIDENTIAL - INTERNAL USE ONLY

TABLE OF CONTENTS
Section
Title
Page
Fiche
Frame
1.
INTRODUCTION

1-1
2
A10
1.1
OVERVIEW

1-1
2
A10
1.1.1 MV/7800 Communications SWITCH-II Overview

1-1
2
A10
1.1.2
212A Intelligent Modem

1-2
2
All
1.1.3
Security Features of the COMSWITCH-II

1-2
2
All
1.2
MODELS

1-3
2
Al2
1.3 HARDWARE DESCRIPTION

1-5
2
A14
1.3.1
Central Processing Unit (CPU)

1-5
2
Al4
1.3.2
Power Supply

1-6
2
B01
1.3.3
I/O Controllers

1-6
2
B01
1.3.4
CPU Chassis

1-6
2
B01
1.4
OPERATING SOFTWARE SUPPORT

1-7
2
B02
1.5
FIELD REPLACEABLE UNITS (FRUs) AND OPTIONS

1-7
2
B02
1.6 PERFORMANCE SPECIFICATIONS

1-14
2
B09
2. OPERATING CONTROLS AND PROCEDURES

2-1
2
B12
2.1
CPU CHASSIS CONTROL PANEL

2-1
2
B12
2.1.1
Switches

2-2
2
B13
2.1.2
Indicator LEDs

2-3
2
B14
2.2
CPU PCB INDICATOR

2-3
2
B14
2.3
VOLTAGE NONREGULATED UNIT (VNR)

2-3
2
B14
2.4
POWER-UP PROCEDURE

2-4
2
CO1
2.5
SYSTEM TERMINAL MODES OF OPERATION

2-5
2
CO2
2.5.1
Normal Operating Mode

2-5
2
CO2
2.5.2
Console Program Mode

2-5
2
CO2
2.5.3
Changing Modes

2-5
2
CO2
2.6
ECLIPSE MV/7800 AND MV/7800-C RESET PROCEDURES

2-6
2
CO3
2.7
POWER-DOWN PROCEDURES

2-6
2
CO3
2.8
MV/7800 COMSWITCH-II OPERATION MODES
AND ACCESS LEVELS

2-6
2
CO3
2.8.1
Modes of Operation

2-6
2
CO3
2.8.2
Access Level

2-7
2
C04
2.9
COMSWITCH-II OPERATING PROCEDURES

2-7
2 C04
2.9.1
Power-up Sequence

2-7
2 C04
2.9.2
Entering Password and Dia'string

2-8
2
CO5
2.10
COMSWITCH-II COMMANDS

2-8
2
CO5
2.10.1
<BREAIC>A - Password VIEW/CHANGE

2-10
2
C07
2.10.2
<BREAK>B - Send BREAK

2-11
2
C08
DGC CONFIDENTIAL - INTERNAL USE ONLY

v 
043-003621

TABLE OF CONTENTS (Continued)
Section
Mtle
Page
Fiche
Frame
2.10.3
<BREAK>C - Conversation Mode ON/OFF

2-12,
2
C09
2.10.4
<BREAIC>D - Local Console ENABLE/DISABLE

2-13
2
C10
2.10.5
<BREAIC>E - End Session

2-15
2
C12
2.10.6
<BREAK>H - HELP

2-15
2
C12
2.10.7
<BREAK>J - Dial String VIEW/CHANGE

2-16
2
C13
2.10.8
<BREAK>M - Remote Mode - SYSTEM

2-18
2
DO1
2.10.9 <BREAK>N - Remote Mode - NONE

2-19
2
D02
2.10.10
<BREAK>Q - Access Level VIEW/CHANGE

2-19
2
D02
2.10.11
<BREAIC>R - Local Console Read-only ON/OFF

2-19
2
D02
2.10.12
<BREAK>U - USER Mode

2-21
2
D04
2.10.13
<BREAK>V - Configuration VIEW/CHANGE

2-21
2
D04
2.10.14
<BREAK>? - Status

2-23
2
D06
2.11
REMOTE CONNECT SEQUENCE

2-24
2
D07
2.12
REMOTE POWER-UP

2-24
2
D0 . 7
2.13
MV/7800 COMSWITCH-II AND MODEL 10188
COMSWITCH-II DIFFERENCES

2-25
2
D08
3.
THEORY OF OPERATION

3-1
2
D12
3.1 FUNCTIONAL OVERVIEW

3-4
2
E01
3.1.1
System Processing Unit

3-4
2
E01
3.1.2
Memory Subsystem

3-4
2
E01
3.1.3
Input/Output Subsystem

3-4
2
E01
3.1.4
Diagnostic Subsystem 
3-4
2
E01
3.1.5
System Bus (S-bus)

3-5
2
E02
3.1.6
Timing 
3-5
2
E02
3.1.7
Address Phase 
3-5
2
E02
3.1.8
Address Modes

3-6
2
E03
3.1.9
Data Phase and Transfer Control

3-7
2
E04
3.1.10
Priority Arbitration

3-,7
2
E04
3.2
SYSTEM OPERATION

3-7
2
E04
3.2.1
Operational Overview

3-7
2
E04
3.2.2
Central Processing Unit

3-9
2
E06
3.2.3
Fixed-Point Arithmetic Logic Unit

3-11
2
E08
3.2.4
Address Translation Unit

3-11
2
E08
3.2.5
Instruction Prefetcher

3-12
2 E09
3.2.6
Control Unit 
3-12
2 E09
3.2.7
CPU-FPU Synchronization

3-12
2 E09
3.2.8
Microsequencer (uSEQ) 
3-13
2 El()
3.2.9
Floating-Point Unit

3-15
2
E12
3.2.10
Memory Subsystem 
3-17
2 E14
3.2.11
Input/Output Subsystem

3-19
2
F02
3.2.12 ECLIPSE Input/Output Bus

3-26
2
F09
3.2.13
Burst Multiplexor Channel Controller

3-26 2
F09
3.3 DIAGNOSTIC SUBSYSTEM

3-30 2
F13
3.3.1
Diagnostic Remote Processor

3-30 2
F13
3.3.2 Power-up and Initialization 
3-31
2
F14
3.3.3
Extended Power-up

3-31
2
F14
043-003621 
vi 
DGC
CONFIDENTIAL - INTERNAL USE ONLY

TABLE OF CONTENTS (Continued)
Section
Title
Page
Fiche
Frame
3.3.4
System Control Program (SCP)

3-32-
2
001
3.3.5
Remote Diagnosis

3-32
2
GO1
3.3.6
Time-of-day Clock/Calendar

3-36
2
GO5
4.
FAULT DIAGNOSIS

4-1
3
A10
4.1
TOOLS, INFORMATION, GUIDELINES, AND
BASIC PROCEDURES

4-1
3
A10
4.1.1
Primary Troubleshooting Tools

4-1
3
A10
4.1.2
Gathering Initial Information

4-4
3
Al3
4.1.3
FRU Replacement Guidelines

4-5
3
A14
4.1.4
ECLIPSE MV/7800 Basic Troubleshooting Procedures

4-5 3
A14
4.2
ELECTROSTATIC DISCHARGE (ESD) PROCEDURE

4-7
3
B02
4.3
TROUBLESHOOTING WITH POWER-UP SELF TEST

4-7
3
B02
4.3.1
Powering-up the Computer 
4-8
3
B03
4.3.2
Initializing the Computer

4-8
3
B03
4.3.3
Automatic Loading

4-10
3
B05
4.4
REMOTE TROUBLESHOOTING

4-14
3
B09
5.
REMOVAL, REPLACEMENT AND ADJUSTMENT
PROCEDURES

5-1
3
B12
5.1
DECORATIVE FRONT PANEL

5-2
3
B13
5.2
FRONT RFI SHIELD

5-3
3
B14
5.3
AC LINE CORD

5-4
3
CO1
5.4
VNR UNIT 
5-4
3
CO1
5.4.1
VNR Unit Removal

5-5
3
CO2
5.4.2
VNR Unit Replacement

5-5
3
CO2
5.5
FAN AND FAN MODULE

5-7
3
C04
5.5.1
Removal of Fan Module and Fans

5-7
3
C04
5.5.2
Replacement of Fan Module and Fans

5-9
3
C06
5.6
FRONT PANEL PCB

5-9
3
C06
5.6.1
Removal of the Front Panel PCB

5-9
3
C06
5.6.2
Replacement of the Front Panel PCB

5-11
3
C08
5.7
INSTALLING THE ELECTROSTATIC DISCHARGE (ESD) KIT

5-12
3
C09
5.8
PLUG-IN PCB

5-13 3
C10
5.8.1
Removal of Plug-in PCBs

5-17
3 C14
5.8.2
Replacement of Plug-in PCBs

5-19
3
D02
5.9
CPU CHASSIS BACK PANEL 
5-20
3 D03
5.9.1
Removal of the CPU Chassis Back Panel 
5-20
3 D03
5.9.2
Replacement of the CPU Chassis Back Panel

5-22
3
DOS
5.10
INTERNAL CPU CHASSIS VNR HARNESS

5-23
3 DO6
5.10.1
Removal of the Internal CPU Chassis VNR Harness 
5-23
3
D06
5.10.2
Replacement of the Internal CPU Chassis VNR Harness 
5-24 3 D07
5.11
EXTERNAL VNR PLUG

5-24
3
D07
5.12
INTERNAL VNR PLUG

5-25
3
D08
5.13
MARGINING LOOPBACK PLUG 
5-26
3
D09
5.14
BMC CABLES 
5-27
3
D10
DGC CONFIDENTIAL - INTERNAL USE ONLY 
vii 
043-003621

TABLE OF CONTENTS (Continued)
Mtle
Page
Fiche
Frame
INSTALLATION/REMOVAL

6-1-
3
D14
INSTALLATION SPECIFICATIONS

6-1
3
D14
Equipment Size and Weight

6-2
3
E01
Equipment Service Clearance

6-2
3
E01
USA Electrical Specifications

6-2
3
E01
International Electrical Specifications

6-4
3
E03
Environmental Specification

6-5
3
E04
LINE VOLTAGE CHECKOUT (For USA Installation)

6-5
3
E04
CABINET INSTALLATION

6-7
3
E06
CHASSIS INSTALLATION

6-11
3
El°
Unpacking CPU Chassis

6-11
3
El0
CPU Chassis Installation

6-12
3
Eli
Electrostatic Discharge (ESD)

6-15
3
E14
CPU Chassis Internal Electrical Connections Check

6-17
3
F02
I/O Controller Cabling and Priority Jumpers

6-21
3
F06
CPU PCB Jumper/Switch Checks

6-22
3
F07
-5 V Booster Board Jumpers

6-24
3
F09
SYSTEM VERIFICATION

6-24
3
F09
INITIALIZING THE COMPUTER

6-27
3
F12
AUTOMATIC LOADING

6-29
3
F14
APL Menu Options

6-29
3
F14
Change Preset Values Program Responses

6-30
3
GO1
COMSWITCH-II INSTALLATION

6-33
3
004
Cabling 
6-33
3
004
Modem Installation 
6-35
3
006
Federal Communications Commission (FCC)
Compliance Regulations

6-36
3
007
System Modem Switch Settings

6-36
3
007
Modem Connection

6-39
3 010
System Terminal Interface MV/7800 COMSWITCH-II Cable
(005-025368) Installation

6-39
3 010
Section
6.
6.1
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.2
6.3
6.4
6.4.1
6.4.2
6.4.3
6.4.4
6.4.5
6.4.6
6.4.7
6.5
6.6
6.7
6.7.1
6.7.2
6.8
6.8.1
6.8.2
6.8.3
6.8.4
6.8.5
6.8.6
7.
8.
8.1
8.2
ILLUSTRATED PARTS BREAKDOWN

NOT AVAILABLE
REFERENCE INFORMATION

8-1
4 
A07
ASSEMBLY LIST 
8-1
4 
A07
RELATED DOCUMENTS LIST

8-3
4  A10
043-003621
 viii
 DGC
CONFIDENTIAL - INTERNAL USE ONLY

LIST OF ILLUSTRATIONS
Figure
Iltle
Page Fiche
Frame
1-1 ECLIPSE MV/7800 and MV/7800-C

1-5
2
A14
1-2
CPU Chassis Configuration

1-6
2 B01
2-1
CPU Chassis Front Control Panel

2-1
2
B12
2-2
Central Processor Unit PCB Fault LED

2-3
2
B14
2-3
VNR Indicator 
2-4
2
CO1
3-1
ECLIPSE MV/7800 System

3-1
2
D12
3-2
ECLIPSE MV/7800 Subsystem Organization

3-2
2
D13
3-3
ECLIPSE MV/7800 System Block Diagram

3-3
2
D14
3-4
System Processing Unit Block Diagram

3-9
2
E06
3-5
Central Processing Unit, Block Diagram

3-10
2
E07
3-6
Microsequencer, Block Diagram

3-13
2
El0
3-7
Floating Point Unit, Block Diagram

3-16
2
E13
3-8
Input/Output Subsystem, Block Diagram

3-20
2
F03
3-9
PIO/DCH Controller, Block Diagram

3-22
2
F05
3-10
BMC Controller, Block Diagram

3-28
2
F11
3-11
Diagnostic Subsystem, Block Diagram

3-30
2
F13
3-12
DRP Configuration for Local and Remote SCP Mode,
Local and Remote System Mode, and
System Console Conversation Mode, Block Diagram

3-34
2
G03
3-13
DRP Configuration for User Mode, Block Diagram

3-35
2
G04
3-14
DRP Configuration for User Conversation Mode, Block Diagram

3-36
2
G05
4-1
Troubleshooting Flowchart for ECLIPSE MV/7800 Computer

4-6
3
B01
4-2
Automatic Program Load Menu

4-10
3
B05
4-3
Change Preset Values Menu

4-11
3
B06
5-1
Decorative Front Panel Release Latch Locations

5-2
3
B13
5-2
Location of Guide Pins for Decorative Front Panel

5-2
3
B13
5-3
Front RFI Shielding

5-3
3
B14
5-4
VNR Power (Line) Cord Removal/Replacement

5-4
3
CO1
5-5
VNR Removal/Replacement

5-6
3
CO3
5-6
Fan Module Attachment

5-7
3
C04
5-7
Fan Attachments

5-8
3 CO5
5-8
Fan 4 Attachment Access

5-8
3
CO5
5-9
Fan Casing Screws and PCB Connector Locations

5-10
3
C07
5-10
Front Panel PCB Attachments

5-11
3
C08
5-11
Installing the ESD Kit

5-12
3
C09
5-12
CPU Chassis Slot Assignments

5-14
3 C11
5-13
CPU PCB Jumper Locations/Baud Rate Switch

5-15
3
C12
5-14
-5 V Booster PCB and Back Panel Jumper Locations

5-15
3
C12
5-15 Bus Bar Safety Shield Removal

5-18
3
DO1
DGC CONFIDENTIAL - INTERNAL USE ONLY
 ix 
043-003621

LIST OF ILLUSTRATIONS (continued)
Figure
Title
Page
Fiche
Frame
5-16
PCB Removal

5-18
3
DO1
5-17
Chassis Attachments, Left Side

5-21
3
D04
5-18
Back Panel Attachments

5-21
3
D04
5-19
Internal Chassis VNR Harness

5-23
3
D06
5-20
External VNR Loopback Plug Location

5-25
3
D08
5-21
Internal VNR Loopback Plug Location

5-26
3
D09
5-22
Margining Loopback Plug Location

5-27
3
D10
5-23
BMC Cable Locations

5-28
3
Dll
6-1
Power Receptacles

6-6
3
E05
6-2
Unpacking the 1605/1606 Cabinet

6-9
3
E08
6-3
Removing Model 1605/1606 Cabinet from the Pallet

6-10
3
E09
6-4
CPU Chassis Unpacking 
6-11
3
E 10
6-5
Installation of Bracket Supports

6-13
3
E12
6-6
Installation of the Front of the Rack

6-14
3
E13
6-7
Fastening the Chassis to the Rails

6-15
3
E14
6-8
Installing the ESD Kit

6-16
3
F01
6-9
CPU Chassis Configuration

6-18
3
F03
6-10
Power Supply Captive Screw

6-18
3
F03
6-11
BMC Cable Connections

6-20
3
F05
6-12
Internal and External VNR Loopback Plug Locations

6-21
3
F06
6-13
System Console Interface Cable Location

6-21
3
F06
6-14
CPU Chassis I/O Slot Priority Chain Jumpering

6-22
3
F07
6-15
PCB Jumper Locations/Baud Rate Switch

6-24
3
F09
6-16
Automatic Program Load Menu

6-29
3
F14
6-17
Change Preset Values Menu

6-30
3
GO1
6-18
System Console Interface Cable 005-019213 Location

6-34
3
G05
6-19
System Terminal Interface MV/7800 COMSWITCH-II Cable
005-025369 Location

6-34
3
005
6-20
External MV/7800 COMSWITCH-H Cable 005-025368

6-35
3
006
6-21
Novation Modem

6-36
3
007
6-22
Novation Modem Controls and Indicators

6-37
3
008
6-23
Modem Connections

6-38
3
009
6-24
Novation Modem Back Panel Connectors

6-39
3
010
043-003621

x 
DGC CONFIDENTIAL - INTERNAL USE ONLY

LIST OF TABLES
Table
Mtle
Page
Fiche
Frame
1-1
ECLIPSE MV/7800, Model 8883 and
ECLIPSE MV/7800-C, Models 8884 and 8885

1-3
2
Al2
1-2
ECLIPSE MV/7800-U Upgrade Models (16-bit to 32-bit)

1-4
2
A13
1-3
Expansion Memory Upgrades for ECLIPSE MV/7800-U

1-4
2
A13
1-4
Models 8883/8884/8885 FRUs

1-7
2
B02
1-5
Optional Expansion Memory PCBs

1-8
2 B03
1-6 Models USK2-A_* and USK4-A2 NOVA 4/S and 41X
FCC Compliant (5-Slot Chassis)

1-8
2
B03
1-7
Models USK2-A_* and USK4-A2 NOVA 4/C
FCC Compliant (5-Slot Chassis)

1-8
2
B03
1-8
Models USK2-B_* and USK4-B2 NOVA 4/S and 4/X
FCC Compliant (16-Slot Chassis)

1-9
2
B04
1-9
Models USK2-B_* and USK4-B2 NOVA 4/C
FCC Compliant (16-Slot Chassis)

1-10
2
B05
1-10
Models USK2-C_* and USK4-C_* S/120
FCC Compliant (5-Slot Chassis)

1-11
2
B06
1-11
Models USK2-D_* and USK4-D2 S/120
FCC Compliant (16-Slot Chassis)

1-11
2
B06
1-12
Models USK2-D_* and USK4-D_* S/120 Noncompliant
FCC Compliant (16-Slot Chassis)

1-12
2
B07
1-13 Models USK2-E_* and USK4-E_* S/140
FCC Compliant (16-Slot Chassis)

1-13
2
B08
1-14
USMV-47_ * ECLIPSE MV/4000 Chassis

1-13
2
B08
1-15
USMV-27 * S/280 Chassis

1-14
2
B09
1-16
MV/7800-17 Supporting PIP Documentation

1-14
2
B09
2-1
Front Control Panel Switches

2-2
2
B13
2-2
COMSWITCH-II Functional Commands

2-9
2
C06
4-1
Diagnostic Listings

4-2
3 All
4-2
MV ADEX w/SCP (SCPADEX)
(Release notice number:

085-000485)

4-3
3 Al2
4-3
CORESIDENT Supporting Documentation

4-4
3
A13
4-4
Power-Up Self Test - Failed - XX Definitions

4-7
3
B02
4-5
Device Codes

4-10
3
B05
5-1
CPU Chassis Slot Assignments and Jumpers

5-13
3
C10
5-2
CPU PCB Jumpers

5-15
3
C12
• Additional suffix for Operating System RTU
DGC CONFIDENTIAL - INTERNAL USE ONLY

xi 
043-003621

LIST OF TABLES (continued)
Table
Mk
Page
Fiche
Frame
6-1
Line Voltage Specifications

6-6-
3
E05
6-2
BMC Internal Cables

6-19
3
F04
6-3
CPU Chassis VNR Loopback Plugs

6-19
3
F04
6-4
CPU PCB Jumpers

6-23
3
F08
6-5
Baud Rate Jumper Switch (SW 1)

6-23
3
F08
6-6
Power-Up Self Test - Failed - XX Definitions

6-26
3
Fll
6-7
Device Codes

6-28
3
F13
6-8
System Modem Configuration Switch Settings

6-37
3
G08
6-9
Remote Modem Configuration Switch Settings

6-38
3
G09
043-003621 
xii 
DGC
CONFIDENTIAL - INTERNAL USE ONLY

RECORD OF REVISIONS
DATE
REV.
CHANGE
APPROVAL
NOTES/PAGES AFFEC i ED
07/86
10/86
12/86
,
EE00
EE01
00
00
00
00
Original Issue
Revised Sections 1 through 6 for
inclusion of COMSWITCH
functionality.
Complete document issue.
4.
DGC CONFIDENTIAL - INTERNAL USE ONLY

iii/iv 
043-003621

SECTION 1
INTRODUCTION
This section describes Data General ECLIPSE MV/7800, model 8883, ECLIPSE MV/7800-C, Models 8884 and
8885 computers, and accessory Memory Expansion boards, Models 8900, 8901, and 8902. It provides a brief
introduction, model numbers, hardware description, software support, and lists of field replaceable units (FRUs).
In addition, this section also includes FRU information for the MV/7800-U, ECLIPSE systems that have been
upgraded. To upgrade a NOVA 4/X, 4/S, 4/C, S/120, or S/140 computer system to a MV/7800-U, see
MV/7800-U System Upgrade Product Information Package 043-000279.
1.1 OVERVIEW
The ECLIPSE MV/7800 and MV/7800-C computer systems are low cost, single-bus implementation of the 32-bit
MV architecture based on a Data General VLSI chip set mounted on a single 15 x 15-inch PCB. The ECLIPSE
MV/7800-U is an upgraded NOVA 41X, 4/S, 4/C, S/120, or S/140 using the same single-bus 32-bit MV
architecture that is used with the MV/7800 and MV/7800-C computer systems.
The ECLIPSE MV/7800 and MV/7800-C have superior I/O and Floating Point performance. The heart of these
systems is a chip set consisting of five VLSI circuits (Microsequencer, ALU/ATU, FPU, I/O, and a BMC) plus
one bipolar circuit. In addition to the chip set, there is either 2 or 4 megabyte of main memory, a gate array for
the implementation of ERCC and memory control, plus PIT, RTC and a Time of Day (TOD) clock.
The ECLIPSE MV/7800 and MV/7800-C computers use power-up and FRU diagnostics to detect and isolate
failures to the FRU level. The computer also supports remote diagnosis via internal COMSWITCH-II protocol.
In addition to the internal memory on the CPU PCB, an expansion memory PCB in the form of a daughter PCB to
the CPU is available as an option. The expansion memory PCB is offered in 2, 4, and 10 Mbyte increments. The
maximum ECLIPSE MV/7800 and MV/7800-C memory allowed for the CPU PCB plus the expansion memory is
14 megabytes. Only one expansion memory PCB can be used.
The system is fully compatible with other Data General peripherals (disks, tape drives, etc.) and supports all
languages operating under AOS/VS, AOS/DVS, and DG/UX operating systems.
1.1.1 MV/7800 Communications SWITCH-II Overview
The MV/7800 Communications Switch-II, resident on the MV/7800 15-inch by 15-inch PCB, is a
communications interface that is enabled at the customer's site for remote diagnosis of hardware and software
problems. The MV/7800 Communication Switch-II, will hereafter be called the COMSWITCH-II. The
COMSWITCH-II is functionally installed between the system console and the MV/7800 TTO/TTI port, and
between a user's terminal and the MV/7800 systems IAC port. This arrangement allows those functions normally
accessible only at the local system console to be available remotely, while also providing normal user activity. An
autodial modem is also connected to provide remote access to the COMSWITCH-II. The remote user can
control the customer's MV/7800 computer system without actually going on site by issuing commands to
DGC
CONFIDENTIAL - INTERNAL USE ONLY

1-1 
043-003621

COMSWITCH-II that control and route traffic between the ports. These commands consist of single letters
preceded by a <BREAK>.
The COMSWITCH-H has the following features:
•
Customer security provided by a password and dialback dialstring.
•
Bypass ("straight-through") hardware that allows cabling and other basic installation procedures to be
verified prior to configuration.
•
A nonvolatile RAM that stores configuration data (baud rates, password, and dialstring).
•A clock/calendar IC, after being set, provides date and time.
1.1.2 212A Intelligent Modem
The COMSWITCH-II is designed to function with a 212A compatible autodial modem with a Hayes instruction
set (a non-autodial modem can be used, providing the dialback feature is not required). A modem provides full
duplex transmission and reception of serial binary data at high-speed (bit rate of 1.2K bits per second).
For the COMSWITCH-H, the operating bit rate is set at 1.2K bits per second for operation.
1.1.3 Security Features of the COMSWITCH-II
To preclude the possibility of unwarranted intrusion, the COMSWITCH-II provides security features to safeguard
the integrity of the host system. There are specific COMSWITCH-II functional commands that may only be
executed by the on-site user, as well as commands that are unique to the remote user. Some commands may be
executed by both the on-site and the remote user. There are three system access levels:
•
NONE

Remote port is unable to connect to the MV/7800 computer system and cannot
change any of the configuration data. The local operator can change password,
dialstring, and configuration data.
•
LIMITED 
Remote port can connect to the MV/7800 computer IAC port or only
communicate with the user terminal, but cannot change any of the
configuration data. The local operator cannot change password, dialstring,
or configuration data.
•
FULL 
Remote port can connect to both port/pairs of the MV/7800 computer, and
can change the configuration parameters. The local operator cannot change
the password, dialstring, or configuration data.
The primary COMSWITCH-II security features are the password and dialstring options available to the on-site
user.
•PASSWORD - The on-site user can select one 40-character password to be stored in the non-volatile
RAM. The remote user must match this password in order to establish a modem port connection and
subsequent access to the host system.
•
TELEPHONE DIALSTRING - The on-site user can select the option of storing one 40-character
dialstring in the COMSWITCH-II non-volatile RAM memory (when required, or when using a
non-autodial modem. This feature can be disabled). The thalstring is the actual string sent to the
autodial modem to dial the telephone number that the caller left. When a dialstring is used, remote
sessions can be established only from an agreed-upon telephone number.
043-003621
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DGC CONFIDENTIAL - INTERNAL USE ONLY

On-site selection of the password and/or telephone access list options enable a specific security routine each time
the modem automatically answers an incoming call. Incoming password and/or telephone number(s) are verified
against the data stored in the COMSWITCH-II memory. The COMSWITCH-II commands the modem to
disconnect after receipt of a valid password and phone number. Correct password/telephone number generates a
command to the modem to dial back the remote requestor, using the exact dialstring that is matched by the
telephone number that was entered as part of the requestor security input. When the number is dialed and
communications is established, the COMSWITCH-II generates a message displayed- on the system console
indicating the start of a remote session, the requestor telephone number, and the time and date information.
If the entered password and/or telephone number do not agree with the data stored in the COMSWITCH-H
memory, the modem receives a disconnect command from the
comswrroi-II.
The COMSWITCH-H also
displays an error message with time and date information on the system console. Security penetration is only
possible if the on-site user permits it.
Maximum security is afforded to the on-site user who chooses to use both the password and telephone dialback
option. The incoming call security routine is always generated.
1.2 MODELS
The ECLIPSE MV/7800 and MV/7800-C computer systems are available in two different memory size models
(Table 1-1) running under one of four different operating systems. The 15 x 15-inch CPU PCB plugs into slot 1
but occupies slots 1 and 2 of a CPU 16-slot chassis. Model prefixes denote cabinet color with suffixes indicating
on board CPU memory size and operating system. The ECLIPSE MV/7800 model 8883 is mounted in a 16-slot
chassis that is housed in a single-bay meter-high cabinet (Models 1605/1606). The ECLIPSE MV/7800-C,
models 8884 and 8885 are housed in a 16-slot chassis that can be rack mounted (Figure 1-1).
The 15 x 15 CPU PCB system is upgradeable into a NOVA 4/X, 4/S, 4/C, S/120, 5- and 16-slot chassis and a
S/140 16-slot chassis. Table 1-2 defines these upgraded model numbers. The expansion add-on memory model
upgrades are given in Table 1-3.
Table 1-1. ECLIPSE MV/7800, Model 8883 and ECLIPSE MV17800-C, Models 8884 and 8885
ECLIPSE
COMPUTER
MODEL NUMBER
MEMORY
SIZE
OPERATING
SYSTEM
MV17800
(B, E) 8883-A 4 MBtye
AOS/VS RTU
MV/7800
(B, E) 8883-B
4 MByte AOS/DVS RTU
MV/7800
(B, E) 8883-C 4 MByte DG/UX RTU
MV/7800-C
(B, E) 8884-A 2 MByte AOS/VS RTU
MV/7800-C (B, E) 8884-B
2 MByte AOS/DVS RTU
MV/7800-C
(B, E) 8884-C
2 MByte DG/UX RTU
MV/7800-C
(B, E) 8885-A
4 MByte
AOS/VS RTU
MV/7800-C (B, E) 8885-8
4 MByte
AOS/DVS RTU
MV/7800-C
(B, E) 8885-C
4 MByte
DG/UX RTU
Prefix (B, E) denotes color (blue or earthtone).
Suffix (A-C) denotes Operating System.
A = AOS/VS, B = AOS/DVS, C = DG/UX,
RTU = Right to Use
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1-3

043-003621

Table 1-2. ECLIPSE MV/7800-U Upgrade Models (16-bit to 32-bit)
MODEL
NO.
DESCRIPTION
USK2-A_*
NOVA 4/X, 4/5, or 4/C, FCC compliant 5-slot to ECLIPSE MV/7800-U
with 2MB on board main memory and operating system RTU.
USK2-B_*
NOVA 41X, 4/S, or 4/C, 16-slot, to ECLIPSE MV/7800-U with 2MB
on board main memory and operating system RTU.
USK2-C_*
S/120, FCC compliant 5-slot to ECLIPSE MV/7800-U with 2MB on
board main memory and operating system RTU.
USK2-D_*
S/120 16-slot to ECLIPSE MV/7800-U with 2MB on board main memory
and operating system RTU.
USK2-E_*
S/140, 1MB to ECLIPSE MV/7800-U with 2MB on board main memory
and operating system RTU.
USK4-A_*
NOVA 41X, 4/S, or 4/C, FCC compliant 5-slot to ECLIPSE MV/7800-U
with 4MB on board main memory and operating system RTU.
USK4-B_*
NOVA 4/X, 4/S, or 4/C, 16-slot, to ECLIPSE MV/7800-U with 4MB
on board main memory and operating system RTU.
USK4-C_*
S/120, FCC compliant 5-slot to ECLIPSE MV/7800-U with 4MB on
board main memory and operating system RTU.
USK4-D_*
S/120 16-slot to ECLIPSE MV/7800-U with 4MB on board main memory
and operating system RTU.
USK4-E_ *
S/140, 1MB to ECLIPSE MV/7800-U with 4MB on board main memory
and operating system RTU.
USMV-47*

ECLIPSE MV/4000, 4 Mbyte to ECLIPSE MV/7800-U w/4 Mbyte on
board main memory and operating system RTU.
USMV-27_,*

S/280, 2 Mbyte to ECLIPSE MV/7800-U w/2 Mbyte on board main
memory and OS RTU.
* Additional suffix for Operating System RTU: A = AOS/VS B = AOS/DVS
C = DG/UX RTU = Right to Use
Table 1-3. Expansion Memory Upgrades for ECLIPSE MV17800-U
MODEL
NO.
DESCRIPTION
UMKT-21
2MB (8900) to 10MB (8902) add-on memory upgrade
UMKT-24
2MB (8900) to

4MB (8901) add-on memory upgrade
UMKT-41
4MB (8901) to 10MB (8902) add-on memory upgrade
043-003621

1-4 
DGC CONFIDENTIAL - INTERNAL
USE ONLY

MODEL 8883

MODELS 8884/8885
4.
FS-12701
Figure 1-1. ECLIPSE MV/7800 and MV17800-C
1.3 HARDWARE DESCRIPTION
The ECLIPSE MV/7800, and MV/7800-C systems contain the following PCBs:
1. 15 X 15-inch CPU PCB containing: full 32-bit (MV/) architecture, CPU plus BMC, RTC, PIT, TTI,
TTO, uSEQ, I/O and FPU (chips), time of day clock, and 2 or 4 megabytes of main memory with
ERCC.
2.
Power supply
3.
I/O controllers
4.
Optional expansion memory models:
MV/7800 MV/7800-C

Memory Size
8900 
2 megabytes
8901 
4 megabytes
8902 
10 megabytes
1.3.1 Central Processing Unit (CPU)
The CPU consists of the following major components:
•
32-bit (MV/) architecture, CPU, uSEQ, I/O (chips)
•2 or 4 megabytes of main memory with ERCC
•
Floating Point Unit (chip)
•
Burst Multiplexor Channel (chip)
•
Time of Day Clock
DGC CONFIDENTIAL - INTERNAL USE ONLY

1-5

043-003621

1.3.2 Power Supply
The power supply converts ac line voltage to the regulated dc voltages required by the system. It is
a 750 watt
switching type that has a microprocessor based intelligent controller.
1.3.3 I/O Controllers
The I/O controllers provide the facility for moving data in and out of the CPU. The particular I/O
controllers used
will depend on the system configuration. Refer to the related peripheral documentation for a
description of the
I/O controllers.
1.3.4 CPU Chassis
The CPU chassis has a 16-slot backplane that accepts the CPU I/O PCBs. After the regulated power
supply, the
first and second
slots are for the CPU PCB. The CPU PCB plugs into slot 1 and if there is a memory
expansion
PCB, it occupies the space of slot 2. The memory expansion PCB is a daughter card that connects to
CPU PCB.
The remaining slots are allocated for I/O controllers (Figure
1-2).
FAN
MODULE
-5 V BOOSTER, BUS REPEATER, OR I/O
-5 V BOOSTER OR I/O
—
I/O ONLY
I/O ONLY
I/O ONLY
I/O ONLY
I/O ONLY
I/O ONLY
I/O ONLY
I/O ONLY
I/O ONLY
I/O ONLY
I/O ONLY
I/O ONLY
OPTIONAL EXPANSION MEMORY
CENTRAL PROCESSING UNIT
POWER SUPPLY
FS-12782
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Figure 1-2. CPU Chassis Configuration
043-003621

1-6

DGC CONFIDENTIAL - INTERNAL USE ONLY

The highest priority I/O is closest to the CPU, in slot 3, with each succeeding lower priority controller installed in
the next higher numbered slot. A bus repeater PCB is used if there is an expansion chassis and will be located in
slot 16. The -5 V booster PCB is required by the CPU chassis if -5 V needs exceed the regulated power supply
capability and requires one I/O slot.
The fan module in the CPU chassis uses six fans for cooling.
The CPU chassis regulated power supply is a module made up of a motherboard and attached daughterboard.
The motherboard is a regulated 750 watt power supply while the daughterboard is a controller that monitors the
power supply and reports the status of the monitored signals to the CPU. The input to the regulated power supply
is from a VNR supply that is attached to the rear of the chassis.
1.4 OPERATING SOFTWARE SUPPORT
The system provides operating software systems for either general purpose, real-time
applications,
or
communications. The instruction set provides compatibility with Data General 32-bit ECLIPSE computers.
1.5 FIELD REPLACEABLE UNITS (FRUs) AND OPTIONS
Table 1-4 lists the ECLIPSE MV/7800, and MV/7800-C FRUs with their respective part numbers. Table 1-5
lists the optional Memory Expansion PCBs. Tables 1-6 through 1-13 lists the MV17800-U FRUs with DGC part
numbers. To coordinate information for the MV/7800-U it may be necessary to reference the Product
Information Package written for the system prior to its upgrade to
a
MV/7800-U.
Table 1-4. Models 8883/8884/8885 FRUs
DESCRIPTION
PART NUMBER
CPU PCB w/2MB Memory (1 of 2)
005-024614
CPU PCB w/4MB Memory
005-024496
Tested Power Supply w/UPSC
005-020141
Front Panel - Earthtone
005-018672
Fan Module
005-018439
Fan Assembly
005-018997
Fan Module Cable
005-018446
Tested Backpanel
005-022278
Tested VNR Chassis (120, 60 Hz)
005-018436
Tested VNR Chassis (220/240, 50 Hz)
005-018915
Configuration Plug (Internal) (120, 60 Hz)
005-018772
Configuration Plug (Internal (220/240, 50 Hz)
005-018773
Internal Wiring Harness
005-018445
Configuration Plug (External) (120, 60 Hz)
005-018774
Configuration Plug (External) (220/240, 50 Hz)
005-018986
TTY Cable
005-019213
BMC Cable (if
BMC Qty. = 1)
005-010968
BMC Cable (if BMC Qty. = 2)
005-009898
BMC Cable (if
BMC Qty. = 3)
(1 of 4) 005-010969
BMC Cable
(if BMC Qty. = 4) J. 005-010972
Terminal Interface COMWITCH-Il Cable (Internal)
005-025369
MV/7800 COMSWITCH-I1 Cable (External)
005-025368
Rack Mounting Kit
005-019199
-5V Booster (Optional)
005-019573
AC Power Cord 120 Vac
109-000719
AC Power Cord 100 Vac
109-000821
AC Power Cord 220/240 Vac
109-000708
DGC CONFIDENTIAL - INTERNAL USE ONLY
 1-7 
043-003621

Table 1-S. Optional Expansion Memory PCBs
DESCRIPTION
PART NUMBER
2MB Expansion Memory PCB
005-024619
4MB Expansion Memory PCB
005-024618
10MB Expansion Memory PCB
005-024616
Table 1-6. Models USK2-A_* and USK4-A_* NOVA 4/S and 4/X FCC Compliant (S-Slot Chassis)
DESCRIPTION 
0
PART NUMBER
Front RFI shield
002-022920
AC Power supply assembly
005-021082
Loopback plug, 100/120 V
005-019024
Loopback plug, 220/240 V
005-019050
Internal I/O cable, console
005-020189
Terminator A-side
005-013932
Terminator B-side
005-013933
Back panel assembly
005-019291
Internal wiring harness
005-020157
Power cord 220/240 V
109-000681
Power cord 100/120 V 109-000719
Plug hardware
123-001947
Line filter assembly
005-021141
* Additional suffix for Operating System RTU: A = AOS/VS
B = AOS/DVS
C = DG/UX
RTU = Right to Use
Table 1-7. Models USIC2-A2 and USK4-A* NOVA 4/C FCC Compliant (5-Slot
Chassis)
DESCRIPTION
PART NUMBER
Front RFI shield
002-022920
Terminator A-side
005-013932
Terminator B-side
005-013933
Loopback plug, 100/120 V
005-019024
Loopback plug, 220/240 V
005-019050
AC power supply assembly
005-020182
Internal I/O cable, console
005-020189
Back panel assembly
005-019291
Internal wiring harness
005-020157
Power cord 220/240 V
109-000681
Power cord 100/120 V 109-000719
Plug hardware
123-001947
Line filter assembly
005-021141
* Additional suffix for Operating System RTU:

A = AOS/VS
B = AOS/DVS
C = DG/UX
RTU = Right to Use
043-003621
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1-8 
DGC CONFIDENTIAL - INTERNAL USE ONLY

Table 1-8. Models USK2-B * and USK4-B * NOVA 4/S and 4/X FCC Compliant
(16-Slot Chassis)
DESCRIPTION
PART
NUMBER
Front console PCB
005-019906
Front RFI shield
002-014496
VNR PCB 120/220/240 V
005-019974
VNR PCB 100 V
005-019975
VNR line filter 100/200 V
005-019262
VNR line filter 220/240 V
005-018993
VNR cable
005-019153
Power supply PCB w/o bbu 100 V
005-017673
Power supply PCB w/o bbu 120/220/240 V
005-019490
Plate cover
002-021318
Fan 120/220/240 V
115-000163
Fan 100 V 115-000287
Fan harness
005-018793
Internal wiring harness
005-018994
Internal I/O cable, console
005-020189
Terminator, A-side 005-015361
Replaced by 005-015361 but may still be in use
005-012438
Terminator, B-side
005-012439
Back panel assembly
005-019907
Margining plug
005-012863
Power cord 220/240 V

.
109-000708
Power cord 100/120 V 109-000719
Configuration plug (internal) 100/200 V
005-018772
Configuration plug (internal) 220/240 V
005-018773
Configuration plug (external) 100/200 V
005-018774
Configuration plug (external) 220/240 V
005-018986
Plug, hardware
,
123-001947
* Additional suffix for Operating System RTU:

A = AOS/VS
B = AOS/DVS
C = DG/UX
RTU = Right to Use
DGC CONFIDENTIAL - INTERNAL USE ONLY 
1-9 
043-003621

Table 1-9. Models USK2-B_* and USK4-B_* NOVA 4/C FCC Compliant (16-Slot
Chassis) ,
DESCRIPTION
PART NUMBER
Front console PCB
005-019906
Front RFI shield
002-014496
VNR PCB 120/220/240 V
005-019974
VNR PCB 100 V
005-019975
VNR line filter 100/200 V
005-019262
VNR line filter 220/240 V
005-018993
VNR cable
005-019153
Plate cover
005-021338
Power supply PCB w/o bbu 100 V
005-017673
Power supply PCB w/o bbu 120/220/240 V
005-019490
Internal wiring harness
005-018994
Fan 120/220/240 V
115-000163
Fan 100 V 115-000287
Fan harness
005-018793
Internal I/O cable, console
005.-020189
Terminator, A-side 005-015361
Replaced by 005-015361 but may still be in use
005-012438
Terminator, B-side
005-012439
Margining plug
005-012863
Back panel assembly
005-019907
Power cord 220/240 V
109-000708
Power cord 100/120 V
109-000719
Configuration plug (internal) 100/200 V
005-018772
Configuration plug (internal) 220/240 V
005-018773
Configuration plug (external) 100/200 V
005-018774
Configuration plug (external) 220/240 V
005-018986
Plug, hardware
123-001947
* Additional suffix for Operating System RTU:

A = AOS/VS
B = AOS/DVS
C = DG/UX
RTU = Right to Use
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