Corvus systems Personal Workstation User manual

THE CORVUS SERVICE MANuAL
CorvusConcept
*** CORVUS SYSTEMS
**

LIMITED WARRANTY
CORVUS SYSTEMS, Inc. warrants all its hardware and software for a period of 180 days from
the date of purchase from any authorized
Corvus Dealer. Should the product fail to be in good
working order at any time during this period, Corvus Systems will, at its option, repair or replace
this product at no additional charge except as set forth below. Repairs will be performed
and non-
functioning parts replaced either with
new or reconditioned components to make the product
function according to company standards and specifications. All replaced parts become the prop-
erty of Corvus Systems,
Inc. This limited warranty does not include service to repair damage to the
product resulting from accident, disaster, misuse, abuse or modifications that are unapproved by
Corvus Systems.
Limited Warranty service may be obtained by delivering the
product during the 180 day war-
ranty
period to Corvus Systems with proof of purchase date. YOU MUST CONTACT CORVUS
CUSTOMER SERVICE TO OBTAIN A"RETURN MERCHANDISE AUTHORIZATION"
PRIOR TO RETURNING THE PRODUCT. THE RMA (RETURN MERCHANDISE AUTHORI-
ZATION) NUMBER ISSUED
BY CORVUS CUSTOMER SERVICE MUST APPEAR ON THE
EXTERIOR OF THE SHIPPING CONTAINER
ONLY ORIGINAL OR EQUIVALENT SHIPPING
MATERIALS MUST
BE USED. If this product is delivered by mail, you agree to insure the prod-
uct
or assume the risk of loss or damage in transit, to prepay shipping charges to the warranty
service location
and to use the original shipping container. Contact Corvus Systems or write to
the Corvus Systems Service Center, 2029 O'Toole, San
Jose, CA 95131 prior to shipping equipment
ALL EXPRESSED AND IMPLIED WARRANTIES FOR THIS PRODUCT INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR APARTICULAR PURPOSE,
ARE
LIMITED IN DURATION TO APERIOD OF 180 DAYS FROM DATE OF PURCHASE, AND NO
WARRANTIES, WHETHER EXPRESSED OR IMPLIED WILL APPLY AFTER THIS PERIOD.
SOME STATES
DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WAR-
RANTY LASTS, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOu.
IF THIS PRODUCT IS NOT IN GOOD WORKING ORDER AS WARRANTED ABOVE, YOUR
SOLE
REMEDY SHALL BE REPAIR OR REPLACEMENT AS PROVIDED ABOVE. IN NO
EVENT WILL CORVUS SYSTEMS BE LIABLE TO YOU FOR ANY DAMAGES, INCLUDING
ANY LOST PROFITS, LOST SAVINGS OR OTHER INCIDENTAL OR CONSEQUENTIAL
DAMAGES ARISING OUT OF THE USE OF OR INABILITY TO
USE SUCH PRODUCT, EVEN
IF CORVUS SYSTEMS OR AN AUTHORIZED CORVUS SYSTEMS DEALER HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM
BY ANY
OTHER
PARTY.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS, SO THE
ABOVE LIMITATIONS
OR EXCLUSIONS
MAY NOT APPLY TO YOu.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU
MAY ALSO HAVE
OTHER RIGHTS WHICH
MAY VARY FROM STATE TO STATE.
FCC WARNING
This equipment generates, uses, and can radiate radio frequency energy and if not installed and
used in accordance with the instruction manual, may cause interference to radio communications.
As temporarily
permitted by regulation it has not been tested for compliance with the limits for
Class Acomputing devices pursuant to Subpart Jof Part 15 of FCC Rules, which are designed to.
provide reasonable protection against such interference in which case the user at his
own expense
will
be required to take whatever measures may be needed to correct the interference.
NOTICE
Corvus Systems, Inc. reserves the right to inake changes in the product described in this manual
at any time without notice. Revised manuals will
be published as needed and may be purchased
from authorized Corvus Dealers.
This manual is copyrighted
and contains proprietary information. All rights reserved. This docu-
ment may not, in whole or in part be copied, photocopied, reproduced, translated,
or reduced to
any electronic medium or machine readable form without prior consent, in writing, from Corvus
Systems, Inc.
CORVUS SYSTEMS
2029 O'Toole Avenue
San Jose, CA 95131
Telephone: [phone]
TELEX: 278976
Copyright
©1983 by Corvus Systems, Inc.
The Corvus Concep!,'" Transporter,'" Corvus OMNINET,
'" Corvus Logicalc,'" Time Travel Editing,'"
EdWord,'" Constellation,'" Corvus,'"
Corvus Systems,'" Personal Workstation,'" Tap Box,'" Passive
Tap
Box,'" and Omninet Unit'" are trademarks of Corvus Systems, Inc.

CORVUS DEALER SERVICE
CORVUS SYSTEMS
CONCEPT
PERSONAL WORKSTATION
SERVICE MANUAL
PART NO.: 7100-04701
DOCUMENT NO.: CCC/30-01/1.1
RELEASE DATE: April, 1983
This document contains three types of notations. These are, in increasing order of importance.
NOTE, CAUTION, and WARNING. The NOTE indicates some action to be taken to speed or
simplify a procedure. The CAUTION indicates that potential damage to the equipment or user
data exists, and care should be taken to avoid this. The WARNING indicates that potential
harm or injury to the service technician or operator exists, and extreme care should be taken to
avoid these.

CORVUS DEALER SERVICE
TABLE OF CONTENTS
iii

Ball~ is a trademark of Ball Inc.
Selectric~ is a trademark of IBM Corp.
AC/DC~ is a trademark of AC/DC Inc.
Tandon ~ is a trademark of Tandon Corp.
MACSbug~ is a trademark of Motorola Corp.
Synertek ~ is a trademark of Synertek
Moss Technology is atrademark of Moss Technologies Inc.
Rockwell International is atrademark of Rockwell International Corp.
iv

CORVUS DEALER SERVICE
TABLE OF CONTENTS
CHAPTER I-OVERVIEW
1.0 Scope of Chapter. ......................................................................... .. 3
1.1 Concept Modules. ................... .. ............................. .. ..................... .. 3
1.1.1 Electronics Tray. ................................................................. .. 3
1.1.1.1 Processor Board ....................................................... .. 3
1.1.1.2 Memory Board ........................................................ .. 4
1.1.2 Video Monitor. .................................................................. .. 4
1.1.3 Keyboard. ....................................................................... .. 4
1.1.4 Power Supply. ................................................................... .. 4
1.2 Concept Options. ......................................................................... .. 5
1.2.1 Operating System Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .. . . . . . . . . . .. 5
1.2.2 Floppy Disk Drive. .............................................................. .. 5
1.2.3 Winchester Disk Drive Options ................................................... .. 5
1.2.4 Archival and Back-Up Option. .................................................... .. 5
1.2.5 Network Option ................................................................ .. 5
CHAPTER 2-FUNCTIONAL DESCRIPTION
2.0 Scope of Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9
2.1 Concept Processor Board. .................................................................. .. 9
2.1.1 Microprocessor ................................................................. .. 9
2.1.2 Bus Buffers 10
2.1.3 Memory Mapper 10
2.1.4 ROMs and Static RAM 10
2.1.5 OMNINET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11
2.1.6 50-Pin I/O Slots 12
2.1.7 Data Communication Ports 13
2.1.8 Interrupts 14
2.1.9 Memory Arbitration 15
2.1.10 Calendar 16
2.1.11 Bell, Timer, and VIA. ..............................................................16
2.1.12 Data Acknowledge 16
2.2 Concept Memory Board 17
2.2.1 Oscillator 17
2.2.2 Horizontal Timing 17
2.2.3 Vertical Timing 18
2.2.4 RAM Timing 18
2.2.5 Memory Selection 18
2.2.6 Video Address Counter 18
2.2.7 Memory Multiplexing 18
2.2.8 Memory Array 18
2.2.9 Memory Buffers 19
2.2.10 Video Shift Registers 19
CHAPTER 3-DISASSEMBLY
3.0 Scope of Chapter 23
3.1 Installation 23
3.2 Visual Inspection 23
3.3 Video Monitor Removal and Disassembly 23
3.4 Keyboard Disassembly and Cleaning 24
v

CORVUS DEALER SERVICE
3.5 Electronics Tray Disassembly and Assembly :24
3.6
Power Supply Removal 25
CHAPTER 4-ADJUSTMENTS
4.0 Scope of Chapter 29
4.l Concept Power Supply Adjustments 29
4.2 Preparations for Video Adjustments 30
4.3 Video
Alignment and Adjustment 30
5.3
5.1
AppendiX E:
Appendix F:
CHAPTER 5- TROUBLESHOOTING
5.0 Scope of Chapter 37
5.1 Levell Troubleshooting 37
5.1.1 Video
Monitor 37
5.1.2 Power Supply 39
5.1.3
Power-On Self Tests 40
5.1.4 Self Test
Error Codes 41
5.1.5 Boot Problems 42
Level 2
Troubleshooting 44
5.2.1 MACSbug Installation
Procedures 44
5.2.2
Communicating with MACSbug 46
5.2.3
Operating Procedures 46
5.2.4 MACSbug Routines 47
Component Level Troubleshooting 47
5.3.1 Proct;ssor Signal Descriptions 47
5.3.2
Processor Test Points 47
5.3.3 Memory and Video Controller Test Points 50
AppendiX
A: Schematics and Assembly Drawings 53
A-I Revision 03 Schematics 55
A-2 Revision 04 Schematics
61
A-3 Assembly Drawings 73
Troubleshooting Flow Chart 83
Test Point Signals 89
C-1
Processor Board Signals 90
C-2
Memory Board Signals 95
Timing Charts 99
0-1 Processor Board Timing Charts 101
0-2 Memory Board Timing Charts 104
MACSbug 107
E-1
MACSbug Commands 109
E-2
MACSbug Routines 111
E-3 Self Test
Routines. .............................................................117
Maps '123
F-1 General Memory and I/O Maps 125
F-2 ROM Mapping of I/O Slots 129
F-3 VIA
General Purpose I/O Ports 131
F-4 OMNINET 135
F-5 Clock/Calendar/ALTMAP/Volume 139
F-6 Data
Communication and Keyboard Registers 143
Memory Board Jumper Layout 149
Appendix 0:
Appendix B:
AppendiX C:
Appendix G:
vi

AppendixH:
Appendix I:
Appendix J:
CORVUS DEALER SERVICE
Connector Descriptions 153
H-l 50-Pin I/O SLOT Description 155
H-2 Data Communication Ports Jl and J2 157
H-3 Board Connectors J4, J5, and J6 161
H-4 Additional Connectors 165
Concept Parts List 169
Specifications 173
LIST OF ILLUSTRATIONS AND TABLES
ILLUSTRATIONS
Figure Page
1 Concept Components. ..................................................................... .. 3
2Motorola MC68000. ....................................................................... .. 9
3 Memory Mapper 10
4ROM and Static RAM Sockets 11
5ADLC 12
6Data Acknowledge Timing 16
7Horizontal Timing Circuit 17
8 Concept Rear View 23
9Latch Screws 24
10 Electronics Tray Power Connections 24
11 Concept Power Supply Voltage Adjustments 29
12 CRT Adjustment Yoke 31
13 Horizontal and Vertical PCA. 31
14 Video PCA 32
15 CORCOM Setting 38
16 Monitor Voltage Test Points 39
17 Rev 03 Boot Switch Settings 43
18 Rev 04 Boot Switch Setting 43
19 Rev 03 ROM and RAM Locations 45
20 Rev 04 ROM and RAM Locations 45
TABLES
Table Page
1 I/O Address Space 12
2 I/O Slot Pin Descriptions 13
3 Interrupt Levels 14
4Processor Board Test Points 48
5 Memory and Timing Signal Locations 50
vii

CORVUS DEALER SERVICE
CHAPTER 1
OVERVIEW
1

CORVUS DEALER SERVICE
CHAPTER 1
OVERVIEW
1.0 Scope of Chapter
The Corvus Concepf" Personal WorkstationNis designed with service in mind. Its modular components can be
substituted during on-site servicing to minimize system down time. These modules are outlined in this chapter.
Options available to enhance the Concept are also discussed.
1.1 Concept Modules
The Concept base contains a power supply, fan, and removable electronics tray. This tray contains the Processor
Board, the Memory Board, speaker, and calendar battery. The modular design of the Concept allows easy access
and replacement of the electronic subassemblies.
mmnmn 111I11I1111I1 111I IIIlIIl
Base
'7
1
J
.::::::,
Video Monitor
Bifurcated Cable Keyboard
1.1.1 Electronics Tray
The entire tray may be removed for replacement when an immediate repair is required. The Processor Board and
Memory Board may be individually substituted if time permits additional troubleshooting.
1.1.1.1 Processor Board
AMotorolaNMC68000 Microprocessor, Boot RAMs and ROMs, OMNINET,N and Clock Calendar are the major
components of the Processor Board. 110 circuitry is also resident on the Processor Board. Specific features include:
Microprocessor
•Motorola MC68000
•16/32-bit
data registers
•24-bit memory address bus
•16-bit data bus
Input/Output
• OMNINET Network interface
•Two serial
asynchronous I/O ports
•Clock and calendar backup battery
•Flexible sound generator
•Two interval timers
•
Four 50-pin I/O slots
3