Digital Electronics Corporation VT240 Series Manual de usuario

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EK-VT240-

TM-001

VT240

Series

Technical Manual

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

EK-VT240-

TM-001

VT240

Series

Technical Manual

Prepared

Educational

Services

Digital

Equipment

Corporation

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

1st

Edition,

August

1984

Digital

Equipment

Corporation.

All

Rights

Reserved.

Printed

U.S.A.

The

reproduction

this

material,

part

whole,

strictly

prohibited.

For

copy

information,

contact

the

Educational

Services

Department,

Digital

Equipment

Corporation,

Maynard,

Massachusetts

'H754.

The

information

this

document

subject

change

without

notice.

Digital

Equipment

Corporation

assumes

responsibility

for

any

errors

that

may

appear

this

document.

This

equipment

generates

and

uses

radio

frequency

energy

and

not

installed

and

used

properly,

that

is,

strict

accordance

with

the

manufacturer's

instructions,

may

cause

interference

radio

and

television

reception.

has

been

type

tested

and

found

comply

with

the

limits

for

Class

computing

device

accordance

with

the

specifications

Subpart

part

FCC

Rules,

which

are

designed

provide

reasonable

protection

against

such

interference

residential

installation.

However,

there

guarantee

that

interference

will

not

occur

particular

installation.

this

equipment

does

cause

interference

radio

television

reception,

which

can

determined

turning

the

equipment

off

and

on,

the

user

encouraged

try

correct

the

interference

one

the

following

measures:

reorient

the

receiving

antenna

relocate

the

computer

with

respect

the

receiver

move

the

computer

away

from

the

receiver

plug

the

computer

into

different

outlet

that

computer

and

receiver

are

different

branch

circuits.

necessary,

the

user

should

consult

the

dealer

experienced

radio/television

technician

for

additional

suggestions.

The

user

may

find

the

following

booklet

prepared

the

Federal

Communications

Commission

helpful:

"How

Identify

and

Resolve

Radio-TV

Interference

Problems".

This

booklet

available

from

the

Government

Printing

Office,

Washington,

20402,

Stock

No.

004-000-00345-4.

The

following

are

trademarks

Digital

Equipment

Corporation,

Maynard,

Massachusetts.

momoomD

DECwriter

P/OS

UNIBUS

DEC

DIGITAL

Professional

VAX

DECmate

Rainbow

VMS

DECnet

MASSBUS

RSTS

DECUS

PDP

RSX

Work

Processor

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INTRODUCTION

CHAPTER 1

1.1

1.2

2.1

2.2

2.3

1.3

3.1

3.2

3.3

1.4

loS

1.6

6.1

6.6

CHAPTER 2

2.1

2.2

2.3

2.4

2.S

2.S.1

2.S.2

2.S.3

2.S.4

2.S.S

2.S.6

2.S.6.1

2.S.6.2

2.S.7

SYSTEM INTRODUCTION

Genera

.......•.••..•.

Physical

Description

System

Box

(VS240)

Keyboard

(LK201)

Monitor

...•..•.•

Display

Capabilities

Display

Characteristics

Text

Capabilities

.•••.

Graphics

Capabilities

Communications

Environment

Major

Operating

States

Operating

Modes

•..•.••.

VT100

Mode

•••.••••

VT200

Mode,

Seven-Bit

VT200

Mode,

Eight-Bit

VTS2

Mode

•.•..

ReGIS

Mode

4010/4014

Mode

Controls

CONTROLS,

INDICATORS,

AND

CONNECTORS

General

System

Box

(VS240)

Monochrome

Monitor

(VR201)

Color

Monitor

(VR241)

Keyboard

(LK201)

Main

Keypad

Editing

Keypad

•.....•••••••.

Auxiliary

Keypad

.....••......•.•

Top-Row

Function

Keys

Visual

Indicators

Audible

Indicators

Audible

Keyclick

•.•••

••••••••••••••••

Connector

Cable

iii

CONTENTS

1-1

1-3

1-4

l-S

I-S

1-6

1-7

2-1

2-2

2-4

2-S

2-7

2-8

2-9

2-11

2-12

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CHAPTER 3

3.1

3.2

3.2.

3.2.2

3.2.

3.3.1

3.3.2

3.3.

3.3.4

3.3.

3.3.6

3.3.

3.4

CHAPTER 4

4.1

4.2

4.2.1

4.2.1.1

4.2.1.2

4.2.2

4.2.

4.2.4

4.2.

4.2.6

4.2.

4.2.8

4.2.

4.2.113

4.2.11

4.2.11.1

4.2.11.2

4.2.11.3

4.2.12

4.2.13

4.2.14

4.2.15

4.3

4.4

CHAPTER 5

5.1

5.2

5.2.1

5.2.1.1

5.2.1.2

5.2.1.3

SYSTEM

OVERVIEW

Genera

...................••

Operating

States

........

Set-Up

Local

On-Line

System

Architecture

CPU

Logic

........••..••••

Video

Logic

System

Communication

Logic

(Opt

ion)

Integral

Modem

Power

Supply

.....

Keyboard

Monitor

System

Interaction

......•.

CPU

LOGIC

Genera

.•......•..•.......

Major

Circuits/Components

Central

Processor

Unit

....•.

T11

Internal

Circuits

T11

Transactions

Mode

Control

Gates

•••••.

Address

Latch

........••.

Decode

Memory

Map

Memory

Access

Read

Only

Memory

(ROM)

(RAM)

ndom

Access

Memory

I/O

Buffer

.....•..

I/O

Decode

......•.

Keyboard

Interface

(I/F)

8251A

USART

Internal

Circuits

•••••

8251A

USART

Addresses

.•.......•••••.

8251A

USART

Timing

Diagrams

..••....•.

Nonvolatile

RAM

(NVR)

Interrupt

Control

Command

Clock

Generator

..••••••••

Signal

Descriptions

Schematic

Reference

Information

SYSTEM

COMMUNICATION

LOGIC

Genera

.••••..••••••.....•••..•..•••..•.•••

Major

Circuits/Components

•.......•••...••..

Dual

Asynchronous

Receiver/Transmitter

(DUART)

2681

DUART

2681

DUART

Internal

Circuits

Addresses

..••••

Timing

Diagrams

•....••••••

3-1

3-2

3-3

3-4

3-5

3-6

4-1

4-2

4-3

4-4

4-6

4-12

4-15

4-18

4-19

4-22

4-23

4-26

4-27

4-29

4-313

4-31

4-33

4-34

4-35

5-1

5-2

5-4

5-6

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5.2.2

5.2.2.1

5.2.2.2

5.2.

5.2.4

5.2.5

5.2.

5.2.7

5.3

5.4

CHAPTER 6

6.1

6.2

6.2.1

6.2.1.1

6.2.1.2

6.2.

6.2.3

6.2.4

6.2.4.1

6.2.4.2

6.2.4.3

6.2.

6.2.5.1

6.2.5.2

6.2.5.3

6.2.5.4

6.2.5.5

6.2.5.6

6.2.6

6.2.7

6.2.7.1

6.2.7.2

6.2.7.3

6.2.8

6.2.

6.2.10

6.2.11

6.2.12

6.2.13

6.2.14

6.2.15

6.2.16

6.3

6.4

Communication/Modem

(Comm/Modem)

Control

...

Comm/Modem

Control

Circuits

....•••••...

Comm/Modem

Control

Addresses

.••••••••••

Communication

Mul

tiplexer

(Comm Mux)

•••••.•

Printer

Interface

(I/F)

.•••.••••.••••••••••

EIA

Host

Interface

(I/F)

••..........•...•••

rnA

Interface

(I/F)

•.••••••••••••••••••••

Integral

Modem

Option

Connector

(J5)

......•

Signal

Descriptions

.•..••••••••.••.••••.•.•••..

Schematic

Reference

Information

.•..••••••.•••..

VIDEO LOGIC

5-8

5-9

5-11

5-12

5-14

5-16

5-17

General

........................................

6-1

Major

Circuits/Components

•.••••••••••••••.•..••

6-2

Character

Processor

(CP)

••....•..•.••.•••••

6-2

8085A-2

Microprocessor

Device

Internal

rcui

...............................

6-5

8085A-2

Microprocessor

Device

Transactions

..........................

Character

Processor

(CP) Memory

.•.........•

Video

Access

•••••.•.......•.••.•.•..•••....

Graphics

Processor

•.•..••..•••••••.•.....•••

PD7220

Graphics

Display

Controller

(GDC)

Internal

Circuits

•....•..•.•••••.

PD7220

Graphics

Display

Controller

(GDC)

Addresses

..••••••.••.•..•.•••••..

PD7220

Graphics

Display

Controller

(GDC)

Transactions

....••.••....•..••••.

Timing

and

Control

Circuits

..••.•.......••.

Clock

Generator

.......•.••••.•........•

BEN

and

STOP

Gates

.•..••.....•••..•.•..

ROM

Address

Counter

.••.•••.•.•..•••.••.

Timing

Signal

Generator

...•.••••......•

Read-Modify-Write

(RMW)

Generator

.•...•

BLANK

Genera

tor

.•.....•...•....•••••••.

Mode

Select

•••••••••....•...••••••••..•....

Bit

Map

Addressing

Circuit

.•..••••••.......

Plane

and

Byte

Select

••...........•••••

Address

Select

........................

Row/Column

Mux

.....•.......•...•.•.•.••

High/Low

(Hi/Lo)

Byte

Select

......••..•••••

Bit

Map

Write

Enable

•...••..•••••....•.••..

Pattern

Select

............................

Logic

unit

................................

Write

Data

Select

•••...•••.•.•.••••••...•••

Bit

Map

•••..........................•••••••

Parallel-to-Serial

(p/S)

Converter

..•••••.•

Output

Map

....•.•••••.•.•••••.•....•••••••.

Digital-to-Analog

(D/A)

•.••.........•.•.•.•

Signal

Descriptions

•.•.•••.........•.•.••••..•.

Schematic

Reference

Information

..•.•••••••.•...

6-6

6-8

6-9

6-12

6-14

6-18

6-22

6-23

6-24

6-26

6-27

6-28

6-29

6-30

6-31

6-32

6-34

6-35

6-37

6-39

6-40

6-41

6-43

6-46

6-47

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CHAPTER 7

7.1

7.2

7.3

7.3.1

7.3.1.1

7.3.1.2

7.3.2

7.3.2.1

7.3.2.2

7.3.2.3

7.4

7.4.1

7.4.2

7.4.3

7.4.4

7.4.4.1

7.4.4.2

7.4.5

7.4.6

7.4.7

7.5

7.5.1

7.5.2

7.5.2.1

7.5.2.2

7.5.2.3

7.5.3

7.5.3.1

7.5.3.2

7.5.4

7.5.4.1

7.5.4.2

7.5.4.3

7.5.5

7.5.5.1

7.5.5.2

7.5.5.3

7.5.5.4

7.5.6

7.5.6.1

7.5.6.2

7.5.6.3

7.5.6.4

7.5.6.5

7.5.7

7.5.7.1

7.6

LK2131

KEYBOARD

Genera

•.•.....•.•..•.•.•••••••••••••••••••••••

Physical

Description

••••••••••••••.••••••••••••

Functional

Description

•...••••.•••..•.•••••.•••

Keyboard

Operation

Overview

.••••.•......•••

Keyboard

Scanning

...•...••••••••••.••••

Control

Audio

Transducer

and

Indicators

............................

Keyboard

Firmware

Functions

••..••••••••.•.•

Functions

Not

Changed

CPU

Instructions

..........................

Functions

Changed

CPU

Instructions

.•

Firmware

Functions

Changed

CPU

Instructions

..........................

Detailed

Keyboard

Circuit

Description

•.••••••••

Keyboard

Matrix

Scanning

..••...••••••••••••

Audio

Transducer

Control

Circuit

..•••••••••

Indicator

(LED)

Control

Circuit

••••••..•.••

Keyboard

Communication

•••••••••••••••••••••

Keyboard

Transmit

Mode

•••••••••••••••••

Keyboard

Receive

Mode

••••••••••••••••••

Reset

Signal

for

81351

Microprocessor

•••••••

Hardware

Keyboard

Identification

(ID)

••••••

Voltage

Supplies

•••.••..••.••••••••••••.••.

Keyboard

Programming

••.••••••••••••••••••.••••.

Keyboard

Layout

and

Key

Identification

.••.•

Modes

••••••••••••••••••••••••••••••••••••••

Special

Considerations

Regarding

Autorepea

............................

Special

Considerations

Regarding

Down/Up

Mode

•.....••...••••••••.••••..•

Autorepeat

Rates

•••••••••••.•••••••••••

Keyboard

Peripherals

..•.••••.•••.•.••••••••

Aud i 0

••••••••••••••••••••••••••••••••••

Indicators

(LEDs)

••.••...••.••..•......

Keyboard-to-System

Module

Protocol

•...•...•

Keycode

Transmission

.......••.•.....••.

Special

Code

Transmission

......•.•.••••

Power

Transmission

....••....•.•.••.•

System

Module

Keyboard

Protocol

..•.•••••

Comma

•••••••••••••••••••••••••••••••

Parameters

............................

Peripheral

Commands

•....••...•.•.•••••.

Mode

Set

Commands

..••.•••••.•.••.•..•••

Special

Considerations

..•..•.••••••••••••..

Error

Handling

.•.•••..•.•..•.•••.•..•••

Keyboard

Locked

Condition

••..••....••••

Reserved

Code

.••••..••.•...•........•.•

Test

Mode

••••••••••••••••••••••••••••••

Future

Expansion

......•.....••••••.....

Default

Conditions

•....•..••.••.•••••••..••

Audio

Volume

..........................

Specifications

7-1

7-2

7-4

7-5

7-6

7-14

7-16

7-17

7-23

7-25

7-26

7-27

7-29

7-313

7-31

7-36

7-38

7-39

7-413

7-41

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CHAPTER 8

8.1

8.2

8.3

8.3.1

8.3.2

8.4

8.4.1

8.5

8.6

8.7

8.7.1

8.7.2

8.7.3

8.7.4

8.7.5

8.7.6

8.7.7

8.7.8

8.7.9

8.7.10

CHAPTER 9

9.1

9.2

9.2.1

9.2.2

9.2.3

9.2.4

9.2.5

9.2.6

9.2.7

CHAPTER

10.1

10.1.1

10.1.2

10.1.3

10.1.3.1

10.1.3.2

10.2

10.2.1

10.2.2

10.2.3

10.2.4

10.2.5

10.2.6

10.2.7

10.2.8

10.2.9

10.3

MONOCHROME

MONITOR

Gener

a 1

••••••••.••••

Physical

Description

Functional

Overview

VIDEO

SYNC

Monochrome

Monitor

System

Communication

Composite

Video

Signal

••••••••••••

CRT

Yoke

••••.••...•

Monitor

Module

Dynamic

Focus

Grid

Bias

Horizontal

Deflection

Linear

Regulator

Vertical

Deflection

Video

Amplifier

(Amp)

Flyback

Transformer

......

POWER

SUPPLY

Genera

••••••••••••••.•••••••••

Major

Circuits/Components

•...•••

Input

and

Fan

Components

•••••

Power

Supply

(PSI)

Power

Input

Connector

(Jl)

+5 V

Input

Circuit

+12

Input

Circuit

-12

Input

Circuit

Power

Okay

Circuit

INTEGRAL

MODEM

OPTION

General

......................

Compatibility

and

Features

Functional

Description

Physical

Description

Power

Requirements

Temperature

and

Humidity

•••..

Major

Circuits

••..•••......

Talk/Data

Relay

Circuit

Switch

Hook

Detector

Circuit

•.•••

Ring

Detector

Circuit

Hook

Relay

Circuit

Line

Interface

Circuit

..•••••••

Dial

Tone

Detect

Circuit

Audio

Coupler

Circuit

Master

Clock

Circuit

Modern

Control

LSI

Circuit

••••.

Terminal

Interface

Signal

Description

vii

8-1

8-2

8-4

8-5

8-7

8-10

8-11

8-12

8-13

8-14

8-15

8-16

9-1

9-2

9-3

9-4

9-14

9-15

9-16

10-1

10-2

10-3

10-4

10-6

10-7

10-10

10-11

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10.3.1

10.3.2

10.3.2.1

10.3.2.2

10.3.2.3

10.3.2.4

10.3.2.5

10.3.2.6

10.3.2.7

10.3.2.8

10.3.2.9

10.3.2.10

10.3.2.11

10.3.2.12

10.3.2.13

10.3.2.14

10.3.2.15

10.3.2.16

10.3.2.17

10.3.2.18

10.3.2.19

10.3.2.20

Signal

States

•.••••••.•....•.•••••••••••••.

10-12

Interface

Signals

•.•...•••••••••••••.•••...

10-12

Transmitted

Data

(TO)

••••.•••••••••••••

10-12

Received

Data

(RD)

••••••••..•..•.•.••••

10-14

Clear

Send

(CTS)

•••••••••••.•...••.•

10-14

Data

Set

Ready

(DSR)

•.•••••••.....•..••

10-14

Signal

and

Power

Ground

••••••••••••...•

10-14

Carrier

Detect

(CD)

••••••••••••••••••••

10-14

Speed

Indication

(CI)

•••••••••••....•..

10-14

Data

Terminal

Ready

(DTR)

•••.••••••••••

10-14

Data

Rate

(Speed)

Select

(CH)

•.•.......

10-15

Dial

Tone

Detect

(DTD)

•.•••...•••••.•••

10-15

Line

Switch

(Talk/Data)

•••••..••...••••

10-15

Data

Available

(DA)

••.•.•••••••••••.•••

10-15

Off

Hook

Drive

(OH-D)

•••.••••••••••••..

10-15

10-Bit

Character

(9/10

SEL)

•..•.•

10-15

Coupler

Cut

Through

(CCT)

•.•.•.•.......

10-15

Switch

Hook

(SW)

••••.....••••••••••••..

10-15

Off

Hook Modem (OH-M)

.•••...•••••••••..

10-15

Analog

Loop

Test

(ANL)

••....•.•••••••.•

10-16

Remote

Data

Loopback

Test

(RDL)

..••••..

10-16

Test

Mode

Indicate

(Test

IND)

•••..•••••

10-16

APPENDIX A SPECIFICATIONS

APPENDIX B

VT240/VT102

DIFFERENCES

APPENDIX C

VT240/VT125

DIFFERENCES

APPENDIX D REGISTER

BIT

VALUES

APPENDIX E VIDEO LOGIC WRITE

MODE

PROGRAMMING

OVERVIEW

FIGURES

1-1

1-2

2-1

VT240

Series

Video

Terminals

•.•••.••••.••...•••

VT240

Series

Terminal

Block

Diagram

.•••...•.•••

System

Box

Controls,

Indicators,

and

1-2

Connectors

.....................................

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

2-9

3-1

3-2

3-3

VR201

Monitor

Controls,

Indicators,

and

Connectors

.....................................

2-3

VR241

Monitor

Controls,

Indicators,

and

Connectors

(Front

and

Rear)

•.••..•••••••.•.....

Keyboard

(North

American)

...••.••.••..••.••.•••

Main

Keypad

.•.••.....•••••..••••••••.......•...

Ed i

Keypad

••••••••.••••••••••••••••••••••••

Auxiliary

Keypad

•.•...••.•••.•.••.......•.•..•.

Top-Row

Function

Keys

and

LEOs

.••.•••..••.....•

Connector

for

BCC01

Cable

••........•..•.•••••..

VT240

Series

Terminal

System

Block

Diagram

•.•..

System

Interaction

Set-up

••.•.......••••..•.

System

Interaction

Local

(Printer

Port

2-4

2-6

2-7

2-8

2-10

2-12

3-3

3-6

Inactive)

......................................

3-7

viii

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

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