Digital Equipment VT180 Series User manual

EK-VT l8X-1M-OO 1
Prepared by Educational services
of
Digital Equipment Corporation

1st Edition, February 1983
©Digital Equipment Corporation 1983.
All Rights Reserved.
Printed in U.S.A.
The material in this manual
is for informational purposes and is subject
to change without notice.
Digital Equipment Corporation assumes
no responsibility for any errors
that may appear in this manual.
CP IM® is aregistered trademark of Digital Research Inc.
Mylar™ is atrademark of DuPont de Nemours &Company, Inc.
WordStar® is aregistered trademark
of MicroPro, Inc.
Z80®
is aregistered trademark of Zilog, Inc.
The manuscript for this book was created on aDIGITAL Word
Processing System and, via atranslation program, was automatically
typeset on DIGITAL's DECset Integrated Publishing System. Book
production was done by
Educational Services Development and
Publishing in Marlboro, MA.
The following are trademarks
of Digital Equipment Corporation:
mlliumD
DEC
DECmate
DECsystem-l0
DECSYSTEM-20
DECUS
DECwriter
DlBOl
MASSBUS
PDP
P/OS ~
Professional
Rainbow
RSTS
RSX
TOPS-l 0
TOPS-20
UNIBUS
VAX
VMS
VT
Work Processor

PREFACE
CHAPTER 1
1.1
1.2
1.3
1.3.1
1.3.2
1.3.3
1.3.4
1.4
1.5
1.6
1.7
1.8
1.9
1.9.1
1.9.2
CHAPTER 2
2.1
2.2
2.3
2.3.1
2.3.2
2.3.2.1
2.3.2.2
2.3.2.3
2.3.2.4
2.4
2.4.1
2.4.2
2.4.3
2.4.4
2.5
2.5.1
2.5.2
2.6
2.6.1
2.6.2
2.6.2.1
2.6.2.2
2.6.2.3
2.6.3
2.6.4
2.6.4.1
2.6.4.2
2.6.4.3
CONTENTS
INTRODucnON ANDSPECIFICATIONS
GENERAL DESCRIPTION 1-1
PHYSICAL DESCRIPTION 1-1
VT180 SPECIFICATIONS 1-3
System Physical Dimensions 1-3
Unit Physical Dimensions 1-3
Environmental Specifications 1-4
Electrical Specifications 1 ~4
VIDEO DISPLAY CHARACTERISTICS 1-4
KEYOOARD 1-5
AUDIBLE SIGNAlS 1-5
COMMUNICATION CHARACTERISTICS 1-5
DISK DRIVE CHARACTERISTICS 1-6
RELATED I:XX::UMENT ATION 1-7
Digital Hardware and Software Documentation 1-7
Other Documentation 1-7
OPERATING INFORMATION
INTR.ODUCTION 2-1
TERMINALOPERATION 2-1
CONTROlS AND INDICATORS 2-1
Terminal Monitor and Disk Drive Power Controls 2-3
KeyOOa.rd Controls 2-4
Standard Keys 2-4
Function Keys 2-5
Set-Up Keys 2-7
Auxiliary Keypad Keys 2-8
VISUAL INDICATORS 2-9
,ON-LINE 2-9
LOCAL 2-9
KBD LOCKED .. ~ 2-9
LI through L4 Indicators 2-10
AUDmLE INDICATORS 2-10
Keyclick 2-1 0
:Bell Tone 2-10
SET-UP MODE 2-1 0
Entering.and Exiting Set-Up
2-10
Set-Up Feature TyJ>eS 2-13
Operator Preference Features 2-13
Communication Compatibility Features 2-13
Installation Features 2-14
Set-Up Feature Selection 2-14
Restoring and Saving Set-Up Features 2-15
Restore 2-15
Sa.ve 2-15
Reset 2-15
•••
1lI

2.6.5
2.6.5.1
2.6.5.2
2.6.5.3
2.6.5.4
2.6.5.5
2.6.5.6
2.6.5.7
CHAPTER 3
3.1
3.2
3.3
3.4
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
3.4.8
3.4.9
3.4.10
3.4.11
3.4.12
3.4.12.1
3.4.12.2
3.4.12.3
3.4.12.4
3.4.13
3.4.14
3.5
3.5.1
·3.5.2
3.5.3
3.5.3.1
3.5.3.2
3.5.3.3
3.6
3.6.1
3.7
3.7.1
3.7.2
3.7.3
3.8
3.8.1
3.8.2
3.8.3
3.8.4
CONTENTS (Cont)
Set-Up Features 2-16
General Set-Up Features 2-16
SET-UP AFeatures 0 •••••••••••••••••••••••••••••• 0 ••••••••••••••••••••••••••••••••• 2-17
SET-UP B2-17
SET-UP B, User Preference Features 2-19
SET-UP B, CP 1M Compatibility Features 2-21
SET-UP B, Host Computer Compatibility 2-23
SET-UP B, Answerback Message 2-24
INSTALLA nON AND INTERFACE INFORMA nON
GENERAL 3-1
SITE CONSIDERATIONS ~ 3-1
UNPACKING AND INSPECTION 3-3
VT18X UPGRADE KIT INSTALLATION 3-4
Check the ROMs on the Terminal Controller Module 3-5
Install the VT 180 Paddle Board 3-9
Install the Expansion Backplane on the Card Cage 3-1 0
Install the Card Guides
3-15
Install the RFShield 3-16
Install the Terminal Controller Module
3-17
Install the VT 18X Control Module 3-17
Install the Chassis in the Bottom Cover 3-19
Install the VTI80 Logo~ ~ ~ ~ .. ~ ~~ 3-19
Install the Top Cover 3-20
Install the New Metal Module Access Cover (Rear Shield)
3- 20
Checking the RX180 Drive Select Switches
3-21
Disk Drive Unit Top Cover Removal 3-22
Setting the Drive Select Switches 3-22
Terminator Resistor Pack
3-23
Disk Drive Unit Top Cover (Reinstallment) 3-24
ROM Removal andJnstallation 3-24
Word Processing Option ~ ~ ..3-25
SYSTEM INTERCONNECTIONS 3-26
Terminal Installation 3-26
Install the RX180 Disk Drive Unit(s)
3-27
Serial Port Connections 3- 29
Printer Port ~ ~ ~ ~ ~ ~3-29
Communications Port ~ ~ ~ 3-31
General Purpose Port 3- 31
POWER-UP PROCEDURE ~ ~ ~ .. ~ ~ ~ 3-31
Self-Test Error Messages 3-32
SYSTEM CHECKOUT ~ ~ ~ ~ ~ ~. 3-33
ROM-Based Diagnostic
~ ~ 3-33
VT 18X Diskette Diagnostic 3-33
Hardware Installation Complete 3- 33
INTERFACE INFORMATION 3-34
Communications Interface Connector 3-34
Printer Interface Connector
3- 34
General Purpose Serial Interface Connector :3-36
RX180
Disk Port Connector 3-36
•
IV

3.8.5
3.8.5.1
3.8.5.2
CHAPTER 4
4.1
4.2
4.2.1
4.2.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
CHAPTERS
5.1
5.2
5.2.1
5.2.1.1
5.2.1.2
5.2.1.3
5.2.1.4
5.2.1.5
5.2.1.6
5.2.1.7
5.2.2
5.3
5.3.1
5.3.2
5.4
CHAPTER 6
6.1
6.2
6.2.1
6.2.1.1
6.2.1.2
6.2.1.3
6.2.1.4
6.2.1.5
6.2.1.6
6.2.2
6.2.3
6.2.4
CONTENTS (Coot)
External Video Connections 3- 36
Composite Video Output Connector (J9) 3-38
Video Input Connector (J8) 3-38
VT180 CP 1M OPERATION
CP 1M INTRODUCTION 0 ••••••••••••••••••••••••••••••••••••••••••••• 4-1
DISKETTES AND FILES 4-1
Storing Information on Diskettes 4-1
Using Diskettes 4-1
LOADING CP/M INTO VTI80 MEMORY 4-2
ENDING AN OPERATING SESSION .4-6
COPYING THE
CP/M MASTER DISKETTE .4-6
USING THE
VT 180 4-9
CONVERSING WITH CP/M 4-10
ISSUING COMMANDS
4-1 0
RESIDENT ANDTRANSIENT
CP/M COMMANDS .4-10
RUNNING APPLICATION PROGRAMS 4-11
SETTING THE SERIAL PORTS' TRANSMISSION CHARACTERISTICS
INTRODUCTION 5-1
PSETUP 5-1
Menu Mode 5-2
Ba.ud Rate Selection .- 5- 2
Communications Port Data/Stop Bits/Parity :.5-2
General Purpose Port Data/Stop Bits/Parity
5- 3
Printer Port Data/StopBits/Parity
5-3
Show All Selections Made 5- 3
Set
J>arlllllet(:rs t<> Defllllit Selecti<>IlS 5-:3
Return to CP 1M 5- 3
Concise Mode 5- 3
PSETUP EXAMPLES 5- 3
Menu Mode 5- 3
Concise Mode 5-6
PSETUP ERROR MESSAGES 5-7
TECHNICAL DESCRIPTION
INTRODUCTION 6-1
SYSTEM DESCRIPTION 6-1
System Subunits 6-1
Terminal Controller Module 6-2
Advanced Video Option (A VO) 6-3
Video Monitor 6- 3
VT 180 Power Supply 6- 3
Keyboard
6- 3
VT 18X Control Module 6- 3
VT100 and VTI8X Control Module Interconnection 6-4
VT 180 Paddle 8<>ard 6-4
RX
180 Disk Drive Unit 6-4
v

6.3
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
6.3.6
6.3.7
6.3.8
6.3.9
6.3.10
6.3.11
6.3.12
6.3.13
6.3.14
6.3.15
6.3.16
6.3.17
6.3.18
6.3.19
6.4
6.5
6.5.1
6.5.2
6.5.3
6.5.4
6.5.5
6.5.5.1
6.5.5.2
6.5.5.3
6.5.5.4
6.5.5.5
6.5.6
6.5.6.1
6.5.6.2
6.5.7
6.5.8
6.5.8.1
6.5.8.2
6.5.8.3
6.5.9
6.5.10
6.5.10.1
6.5.10.2
6.5.10.3
6.5.11
6.5.12
6.5.12.1
6.5.12.2
6.5.12.3
6.5.12.4
CONTENTS (Coot)
VT100 FUNCTIONAL DESCRIPTION 6-5
Microprocessor 6- 5
Program ROM 6-6
Scratch RAM 6-6
Nonvolatile RAM 6-6
Advanced Video Option 6-6
Keyooard 6-6
LE:Ds 6-6
KeyOOard Translator 6-6
Transmit Buffer 6-6
Co "T . mmunlca.tlon ransmltter 6-6
C" R .
ommunlcatlon ecelver 6-7
Silo 6-7
Control Function Parser 6-7
Screen RAM 6- 7
Video Processor 6-7
CRTMonitor 6-8
Power Supply 6-8
Standard Terminal Port 6-8
EIA Drivers and Receivers 6-8
FIR~ ~E 1~C:>JC)'-JC1[1[C:>1'l 6-8
TERMINAL CONTROLLER DESCRIPTION 6-1 0
80·80 Microprocessor 6-1 0
Data
Bus and System Controller 6-12
Clock Generator 6-14
Bus Timing 6-14
Microprocessor Memory
6-15
Memory Map 6-17
Memory I:levices 6-1 7
ROM
I:lecod.ing 6-17
RAM I:lecod.ing 6-1 7
Memory Disable
6-18
I/O I:>ecod.ing 6-18
PUSARTRead and Write 6-18
I/O Read and Write 6-18
Interrupt Vector 6-19
Communication Transceiver
6- 20
Data Transmission 6- 20
Data Reception 6-20
PUSART Programming 6-22
Standard Terminal Port
6-24
Nonvolatile RAM 6- 25
NVR Control 6-25
Mi<:rol'rocessor lYfanagement 6-2:1
NVR Timing 6- 26 .
Keyboard Interface
6-26
Video Processor 6- 27
Timing ChiI'
I:les<:ril'tion 6-30
Control ChiI'
Des<:ril'tion 6- 38
Address Counter and Data Stru<:ture in RAIYf 6-43
Address Lat<:h Buffer 6-44
•
VI

6.5.12.5
6.5.12.6
6.5.12.7
6.5.12.8
6.5.12.9
6.5.12.10
6.5.12.11
6.5.12.12
6.5.13
6.5.13.1
6.5.13.2
6.5.13.3
6.5.13.4
6.5.13.5
6.6
6.6.1
6.6.2
6.6.3
6.6.4
6.6.5
6.6.6
6.6.7
6.6.8
6.6.9
6.6.10
6.6.10.1
6.6.10.2
6.6.10.3
6.6.10.4
6.6.10.5
6.6.10.6
6.6.11
6.6.12
6.6.12.1
6.6.12.2
6.6.12.3
6.6.12.4
6.6.12.5
6.6.12.6
6.6.13
6.6.13.1
6.6.13.2
6.6.13.3
6.6.13.4
6.6.13.5
6.6.14
6.6.14.1
6.6.14.2
6.6.14.3
6.6.14.4
CONTENTS (Coot)
Line Buffer 6-44
Character Generator ,6-44
Video Shift Register 6-45
Terminator 6-46
DMA Cycle Timing Diagram 6-47
Video Blanking 6-49
Video Input and Output 6-49
Intensity Control ....o ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 0 •••••••••••• 6-49
Microprocessor - Video Processor Interface 6-50
Screen Memory Organization 6-50
Line Organiza. tion 6- 51
Scrolling Region 6- 52
Cursor 6- 52
Set-up 6-53
VT18X CONTROL MODULE DESCRIPTION 6-53
Z80A CPU 6- 54
Interrupts 6- 56
64K Byte RAM 6-58
8K Byte ROM 6-59
Console Port 6-60
Communications Port 6-62
Printer Port 6-64
General Purpose Serial Port 6-65
Terminal Controller and VT18X Control Module Interconnections 6-65
Disk Drive Controller 6-67
Disk Drive Controller Functional Description 6-67
Formatter/Controller : 6-67
Phase-Locked Loop 6- 73
DiskDrive Controller Registers 6-76
Disk Drive Controller Latches 6-77
Disk Drive Interface Connector 6-77
VT18X Control Module Input/Output Addresses 6-78
Communications Data and Control Status Registers 6-79
ASYnchronous Mode Instruction Format
(41H, 49H, 51H, 59H) WO 6-79
Synchronous Mode Instruction Format (59H) WO
6-81
Command Instruction Registers (41 H, 49H, 51 H, 59H) WO 6-82
Status Read Registers (41H, 49H, 51H, 59H) RO
6-83
Transmit Data Buffer Register (40H, 48H, 50H, 58H) WO 6-84
Received Data Buffer Register (40H, 48H, 50H, 58H) RO
6-85
Disk Drive Controller Registers 6-85
Command Register (Write-Only) 6-85
Status Register (Read-Only) 6-89
Track Register (Read/Write)
6-93
Sector Register (Read/Write) 6-93
Data Register (Read/Write) 6-93
Disk Drive Command Summary 6-93
TYJle ICommands 6-93
TYJle II Commands 6-93
TYJle III Commands 6-94
Type IV Command 6-94
..
VB

6.6.15
6.6.16
6.6.17
6.6.18
6.6.19
6.6.20
6.7
6.8
6.8.1
6.8.1.1
6.8.1.2
6.8.1.3
6.8.1.4
6.8.1.5
6.8.1.6
6.8.1.7
6.8.1.8
6.8.1.9
6.8.1.10
6.9
6.9.1
6.9.2
6.9.3
6.9.4
6.9.5
6.9.5.1
6.9.5.2
6.10
6.10.1
6.10.2
6.10.3
6.10.4
6.10.5
6.10.6
6.10.6.1
6.10.6.2
6.10.6.3
6.10.6.4
6.10.6.5
6.10.6.6
6.10.7
6.10.8
6.10.9
6.10.9.1
6.10.9.2
6.10.9.3
6.10.9.4
6.10.9.5
CONTENTS (Cont)
General Control and Status Register (80H) 6-94
Communications Status Register (88H) 6-96
Communications Control/Baud Rate Select Register (90H)
6-97
Interrupt and INIT Reset Register (90H) 6-98
Diagnostic Write Register (98H) 6-98
Diagnostic Read Register
(AOH) ., 6-99
VTI80 PADDLE BOARD DESCRIPTION 6-100
VT100 MONITOR 6-102
Elston Monitor Board Description (Digital part number 30-16080) 6-102
Video Driver ~ 6-102
Brightness 6-102
Vertical Oscillator 6-102
Self-Oscillation 0 0_ 0 6-1 02
Vertical Output 6-103
Lineariza.tion 6-103
Horizontal Driver 6-103
Horizontal Deflection Operation 6-103
Horizontal Output Circuit 6-106
High Voltage and Focus 6-106
POWERSUPPLY 6-106
Power Input 6-106
Start-Up Circuit 6-107
Control Circuit
~ 6-107
Outputs 6-109
Power Supply Specifications
6-11 0
Input Specifications 6-110
Cooling
.. :6-114
KEYBOARD DESCRIPTION 6-114
Keyboard
Block Diagram 6-114
Keyboard UARTs 6-114
Keyboard Status Byte 6-115
/'
Key Address Counter 6-116
Key Scanning and Address Formation 6-117
Bidirectional Interface Operation 6-119
Interface Line 6-119
Receiving Side 6-119
Terminal Data Encoding 6-120
Combined Interface Signal
6-121
Decoding of Data from TerminaL 6-121
Keyboard Output 6-122
Bell 6-123
Keyboard Interrupt Routine 6-123
Logical Keyboard Processor 6-124
Key Recognition 6-124
Key Rollover 6-124
Generation of Codes 6-125
Keyboard Transmit Buffer 6-126
Auto Repeat 6-126
•••
Vlll

CHAPTER 7
7.1
7.2
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.ti
7.3
7.3.1
7.3.2
7.3.3
7.4
7.4.1
7.4.1.1
7.4.1.2
7.4.1.3
7.4.1.4
7.4.2
7.4.2.1
7.4.2.2
7.4.3
7.4.4
7.4.4.1
7.4.4.2
7.4.4.3
7.4.4.4
7.4.5
7.5
7.5.1
7.5.2
7.5.2.1
7.5.2.2
7.5.3
7.5.4
7.ti
7.ti.l
7.ti.1.1
7.ti.1.2
7,ti.2
7.ti.2.1
7.ti.2.2
7.ti.2.3
7.ti.2.4
7.ti.2.5
7.ti.2.ti
7.ti.2.7
CONTENTS (Coot)
SERVICE INFORMATION
INTRODUCTION 7-1
TESTING THE VT180 USING ROM DIAGNOSTICS 7-1
Error Messages and Codes 7-1
Power-Up Test 7-3
Keyooard Tests 7-6
CPU, Dynamic RAM, Communication UART,
ancl ][)Us)( Dri,,(: Controll(:r T~ts 7-ti
Set-Up Screen Test ~ 7-6
Video Adjust Test 7-7
MODULE CONFIGURATIONS 7-8
VT 18X Control Moclule Configuration 7-8
T(:rminal Controll(:r Moclul(: ROMs 7-9
Acl"anrecl Vicl(:o Option Configuration 7-9
DISKEITE DIAGNOSTICS 7-9
Diagnostic Operation 7-10
Basic Test OJ>eration 7 -10
Ext(:ncl(:cl T~t Opt:ration 7-14
Individual Diagnostics 7-14
Incli"iclual T~t Exampl(: Dialog 7-1 ti
Floppy Test 7-17
Happy Test OJleration 7-17
Floppy T(:st ~cription 7-18
RAM Test 7-19
Communications Tests 7-20
Basic Communications T~t 7-20
Synchronous Communications
T(:st 7-20
Loopbac)( Plug T~ts 7-21
Print(:r ConficlenC(: T ~ts 7-21
Di's)((:u(:-Bas(:cl Diagnostic Error M(:ssag~ 7-22
TROUBLESHOOTING 7-22
Troubl~hooting th(: Basic VT 180 7-23
Troubl~hooting th(: VT180 with th(: Diagnostic Dis)((:u(: 7-23
Starting th(: Diagnostic Dis)((:u(: 7-24
Diagnostic Error
M(:ssag~ ,7-24
Troubl~hooting th(: VT180 with no Printout.. 7-24
Troubl~hooting th(: Options 7-29
VIDEO ALIGNMENT 7-30
Alignment Template 7-30
Ma)(ing aPapt:r T(:mplat(: 7-31
Attaching the T(:mplat(: 7-31
Monitor Adjustments 7-32
Brightn~s Acljustm(:nt 7-32
Yoke Adjustment 7-32
V(:rtical Hdght Acljustm(:nt 7-33
Horizontal Wiclth Acljustm(:nt 7-33
Center Adjustment 7-33
V(:rtical Lin(:arity Acljustm(:nt 7-33
Focus Adjustment 7-34
•
IX

7.7
7.7.1
7.7.2
7.7.3
7.7.4
7.7.5
7.7.6
7.7.7
7.7.8
7.7.9
7.7.10
7.7.11
7.7.12
7.7.13
7.7.14
7.7.15
7.7.16
7.7.17
7.7.18
7.7.19
7.7.20
7.7.21
7.7.21.1
7.7.21.2
7.7.22
7.7.23
7.7.23.1
7.7.23.2
7.7.23.3
7.7.23.4
APPENDIX A
A.l
A.2
A.2.1
A.2.2
A.2.3
A.2.4
A.2.5
A.2.6
A.2.7
A.2.8
A.2.9
A.2.1O
A.2.11
A.3
A.3.1
A.3.2
CONTENTS (Cont)
MODULE AND MECHANICAL ASSEMBLY REMOVAL
AND INSTALLATION 7-34
Cable Access Cover (Wort Cover) and Module Access Cover
(Rear Shield) 0 ••••••••••••••••••••••••••••• w_ •••••••• o ••••••••••••••••• o •••••••••• 7-34
Disk Drive Unites) 7-36
VTl8X Control Module
7-37
Terminal Controller Module 7- 37
VT 180 Paddle Board 7- 38
Advanced Video Option (A VO) 7-38
Terminal Controller Module ROMs 7-38
Keyooard Top Cover 7-38
Keyooard 7-39
Keyooard Cable 7-39
Keyboard
SJ>eaker 7-40
Keycaps 7-40
Top Cover 7
-41
Video Monitor Board (Digital or Elston) 7-42
Flyback Transformer (Digital or Elston) 7
-43
Bottom Cover Removal and Installation 7-43
Power Supply 7 -43
RF Shield Removal 7-45
OC Power Harness 7 -46
Expansion Backplane Removal.. 7 -4 7
CRT Discharge and Anode Cap 7
-4 7
CRTAnode Discharge 7
-4 7
Anode Cap Removal and Installation
7-48
CRTand Yoke Assembly 7-50
Field Handling of CRTs 7-50
Replacing aCRT
7-51
Handling the CRT 7- 51
StoringaCRT 7-51
Discarding aCRT .. ---;::- 7-51
VT180 PROGRAMMING INFORMATION
GENERAL INFORMATION A-I
VT 180 KEyBOARD A-I
LED Indicators A-2
SET-UP Key A-2
Alphal>etic Keys A-2
Nonalphabetic Keys A-4
Function Keys A-6
NO SCROLL A-6
BREAK A-6
CTRL (Control) A-7
Auto
ReJ>eating A-8
Cursor Control Keys A-8
Auxiliary Keypad A-8
TERMINALCONTROLCOMMANDS A-I0
Control Characters -A-I0
ANSI Control Sequences
A-II
x