IBM 3290 User manual

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Description and Reference

First Edition (March 1983)
It is possible that this material may contain reference to, or information about,
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© Copyright International Business Machines Corporation 1983
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Preface
Organization
Companion Publications
This publication provides introductory, reference, operational, and error-recovery
information relative to the functional and programming characteristics of the IBM
3290 Information Panel.
This manual is for system programmers, application programmers, and those who
prepare operating procedures for end users.
This manual has six chapters and three appendixes:
• Chapter 1 contains introductory information.
Chapter 2 gives the characteristics of the 3290.
• Chapter 3 describes functions that are unique to the 3290 and that are largely
operator-controlled.
• Chapter 4 lists the 3270 data stream functions supported by the 3290. For a
general description of the 3270 data stream functions, the reader is referred
to the IBM 3270 Information Display System Data Stream Programmer's
Reference, GA23-0059. Only those functions unique to the 3290 are
described in this chapter.
• Chapter S describes the 3290 controls and indicators.
• Chapter 6 explains the functions of the keyboard and keypad keys.
• Appendix A contc.ins examples of operator setup and screen management.
• Appendix B lists the 3290 error codes, with the probable causes and
corrective actions.
• Appendix C defines setup level 3 error codes.
A Glossary, preceding the Index, defines terms used in this manual.
It is assumed that the user is familiar with the 3270 data stream, its functions, and
how to write programs using it. If not familiar with the 3270 data stream, the user
should view the IBM 3270 Information Display System Data Stream
Programmer's Reference, GA23-0059, before trying to use this manual. In any
case, that publication should be available for reference.
It may also be necessary to refer to other IBM publications:
•
•
IBM 3270 Information Display System 3274 Control Unit Description and
Programmer's Guide, GA23-0061
IBM 3270 Information Display System Feature Description, GA23-0113
IBM 3270 Information Display System Character Set Reference, GA27-2837
Preface iii

iv
• IBM 3270 Information Display System 3274 Control Unit Planning, Setup.
and Customizing Guide, GA27-2827 (for Configuration Support T)
IBM 3270 Information Display System 3274 Customizing Guide, GA23-0065
(for Configuration Support D)
• IBM 3290 Information Panel Setup Instructions, GA23-0080
• IBM 3290 Information Panel Screen Management Form, GX27-0028
• IBM 3290 Information Panel Problem Analysis and Resolution, GA23-0125
(U.S.)
• IBM 3290 Information Panel Problem Determination, GA23-0126 (other
countries)
IBM 3270 Information Display System Data Stream Programmer's Reference.
GA23-0059
• IBM 3270 Information Display System Buffer Address Codes, GA23-0057

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Contents
Chapter 1. Introduction 1-1
Chapter 2. Display Characteristics 2-1
Character Cell 2-2
Character Matrix 2-3
Screen Layout and Addressing 2-3
Chapter 3. 3290-Unique Functions 3-1
Multiple Interactive Screens Function 3-1
Customizing for the Multiple Interactive Screens Function 3-2
Logical-Terminal Definition Table 3-2
Logical-Terminal Set Defaults 3-5
Allowable Screen Divisions and Usable Area 3-5
Allowable Number of Logical Terminals 3-6
Logon 3-6
Multiple Copy Screens Function 3-6
Copy Screen Mode 3-6
Setup Functions 3-7
Setup Level I 3-8
Setup Level 2 3-10
Setup Level 3 3-11
Logical-Terminal Screen Sizes and Character Cell Sizes 3-15
Logical-Terminal Screen Size (Non-SNA) 3-16
Logical-Terminal Screen Size (SNA) 3-16
Partition/Viewport Size 3-16
Character Cell Sizes 3-16
Zoom Function 3-17
Rule Function 3-17
Rule Function in Implicit Partition State 3-18
Rule Function in Explicit Partitioned State 3-18
Image Limit 3-18
Row/Column Indicator 3-19
Logical-Terminal Identifier 3-19
329(}-Unique Aspects of the Local Copy Function 3-19
Row Suppression 3-20
Local Copy Initiation 3-20
Operator-Initiated Local Copy 3-21
Host-Initiated Local Copy 3-21
Host Contention with Operator-Initiated Local Copy 3-21
Printer PA Key Operation during Local Copy 3-23
Customizing for the Local Copy Function 3-23
Chapter 4. 3270 Data-Stream Functions 4-1
Interface Codes 4-1
Attributes 4-4
Field Attributes 4-4
Extended Field Attributes and Character Attributes 4-5
Attribute Type X'4!' - Extended Highlighting 4-5
Attribute Type X'42' - Color 4-5
Attribute Type X'43' - Character Set Selection 4-5
Commands 4-6
3270 Data Stream Commands 4-6
Non-SNA Channel Commands 4-6
Write Control Character 4-7
3270 Data Stream Orders 4-7
Outbound 3270 Data Stream Structured Fields 4-9
Load Programmed Symbols Structured Field Format 4-10
Create Partition Structured Field Format 4-11
Activate Partition Structured Field Format 4-12
Destroy Partition Structured Field Format 4-13
Set Window Origin Structured Field Format 4-1 3
Set Reply Mode Structured Field Format 4-14
Reset Partition Structured Field Format 4-15
ERASE/RESET Structured Field Format 4-15
Outbound 3270DS Structured Field Format 4-16
Read Partition Structured Field Format 4-16
Contents V

vi
Inbound 3270 Data Stream 4-17
Inbound 3270 Data Stream for Partition 0 4-18
Short Read Format 4-18
Read Modified and Read Modified All Format 4-19
Read Buffer Format 4-20
Read Buffer Format in Field Reply Mode 4-20
Read Buffer Format in Extended Field and Character Mode 4-21
Inbound Structured Fields 4-22
Inbound 3270DS Structured Field Format for Partitions 01 through OF 4-22
Query Reply Structured Field 4-23
Usable Area Query Reply Structured Field Format 4-23
Partitions Query Reply Structured Field Format 4-24
Self-Defining Parameter 4-25
Character Sets Query Reply Structured Field Format 4-26
Character Sets Descriptor Format 4-27
Reply Modes Query Reply Structured Field Format 4-27
ColorQuery Reply Structured Field Format 4-28
Highlight Query Reply Structured Field Format 4-29
Implicit Partition Query Reply Structured Field Format 4-30
Implicit Partition Default and Alternate Screen Size 4-30
Character Cell Dimensions 4-30
Self-Defining Parameters 4-30
Transmission of Buffer Addresses 4-31
Buffer Addresses 4-31
Example of Buffer Address Calculation 4-32
Transmission of a Buffer Address 4-32
Transmission of Buffer Address in 16-Bit Address Mode 4-32
Transmission of Buffer Address in 12/14-Bit Address Mode 4-32
Chapter 5. 3290 Controls and Indicators 5-1
3290 Controls 5-2
On/Off Switch 5-2
On Indicator 5-2
Security Keylock 5-3
Test Switch 5-3
Tilt Control Lever 5-4
Audible Alarm Control 5-4
3290 Indicators 5-5
Quick Reference 5-6
Readiness and System Connection 5-8
Online (Non-SNA) 5-8
Online (SNA) 5-8
Ready 5-8
Setup 5-8
Copy Screen 5-8
Test 5-8
System Operator 5-9
My Job 5-9
Unowned 5-9
Do Not Enter 5-9
Security Key 5-10
Machine Check 5-10
Communication Check 5-10
Printer Not Working 5-10
Printer Busy 5-11
Printer Very Busy 5-11
Program Check 5-11
What? 5-12
Terminal Wait 5-12
Minus Function 5-12
Minus Function - Operator Unauthorized 5-12
Too Much Entered 5-13
Numeric Data Only 5-13
Invalid Dead-Key Combination (Canadian-Bilingual and French Keyboards Only)
Go Elsewhere 5-14
Partition Wait 5-14
System Lock 5-14
What Number 5-14
Operator Unauthorized 5-15
5-13

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Communication Error Reminder 5-15
Communication Error Reminder 5-15
Programmed Symbol Selection 5-15
Programmed Symbol Set (A through F) (Field-Defined) 5-15
Nonloadable Character Set (Field Inherit) 5-15
Programmed Symbol Set (A through F) (Field Inherit) 5-16
Programmed Symbol Set (A through F) (Operator-Selected) 5-16
Character Selection 5-16
Alpha 5-16
Katakana 5-16
APL 5-16
Shift Selection 5-17
Numeric 5-17
Upshift 5-17
Highlight Selection 5-17
Normal (Field Inherit) 5-17
Blink (Field Inherit) 5-17
Reverse Video (Field Inherit) 5-18
Underscore (Field Inherit) 5-18
Blink (Operator-Selected) 5-18
Reverse Video (Operator-Selected) 5-18
Underscore (Operator-Selected) 5-18
Insert 5-19
Insert Mode 5-19
Printer Status 5-19
Assign Printer 5-19
Printer Assignment 5-19
Printer Failure 5-19
Printer Printing 5-19
What Printer 5-19
Image Limit 5-20
Image Limit 5-20
Logical-Terminal ID 5-20
Logical-Terminal ID 5-20
Row and Column Position 5-20
Row and Column Indicator 5-20
Chapter 6. 3290 Keyboard and Keypad 6-1
Keyboard 6-1
Keyboard Controls 6-3
Clicker Volume Control 6-3
Keyboard ID Switches 6-3
Keypad 6-4
Keyboard Key Functions 6-6
Left Control Keys 6-6
Attention Key 6-6
Clear Key 6-7
Clear Partition Key 6- 7
Copy Key 6-8
Cursor Select Key 6-8
Erase to End of Field Key 6-8
Erase Input Key 6-9
ExSel Key 6-9
!dent Key 6-9
Print Key 6-10
Print Operation 6-10
Copy Screen Operation 6-11
Setup Key 6-11
System Request Key 6-12
Operating in an SNA Environment 6-12
Operating in a Non-SNA Environment 6-12
Test Key 6-12
Zoom Key 6-13
Right Control Keys 6-14
Backtab Key 6-14
Change Screen Key 6-15
Cursor Left and Cursor Right Keys 6-15
Cursor Up and Cursor Down Keys 6-15
Delete Character Key 6-15
Key 6-16
Contents vii

viii
Dup Key 6-16
Field Mark Key 6-16
Home Key 6-17
Insert Mode Key 6-17
Jump Partition Key 6-18
Jump Screen Key 6-18
Program Access (PA) Keys-PAI through PA3 6-18
Ruic Key 6-19
Scroll Forward and Backward Keys 6-19
~Keys 6-19
Program Function Keys 6-20
Alternate Cursor Key 6-20
APL Key 6-20
Blink Character (Highlighting) Key 6-21
Clicker Key 6-21
Cursor Blink Key 6-21
Field Inherit Keys 6-22
Programmed Symbol Set Field Inherit 6-22
Highlighting Field Inherit 6-23
Program Function (PF) Keys - PF 1 through PF 24 6-23
Programmed Symbols (PS) Keys, PSA through PSF 6-24
Reverse Video (Highlighting) Key 6-25
Underscore (Highlighting) Key 6-25
Data Keys 6-26
Alphabetic Keys 6-26
Alternate Shift Keys 6-27
APL Character Keys 6-27
Dead Keys (Canadian-Bilingual or French Keyboards Only) 6-28
Device Cancel Key 6-29
Enter Key 6-29
New Line Key 6-30
Numeric and Symbol and Punctuation Mark Keys 6-30
Reset Key 6-31
Spacebar 6-31
Tab Key 6-32
Backspace Key 6-32
Uppercase Shift and Uppercase Shift Lock 6-32
Appendix A. Examples of Setup and Screen Management A-1
Example l: Rule Function A-2
Example 2: Multiple Interactive Screens A-3
Example 3: Copy Screen A-5
Example 4: Modifying Screen Characteristics A-7
Appendix B. Error Code Charts B-1
Indications during Power-On Sequence (3274-Detected Errors) B-1
During Initiating of Downstream Load B-1
During Downstream Load B-2
Indications during Operation B-2
3274-Detected Machine Check Errors B-2
3274-Detected Program Checks B-2
Communication Check Errors B-2
3290-Detected Machine Check Errors B-2
Program Error Codes B-5
Appendix C. Setup Level 3 Error Codes C-1
Glossary X-1
Index X-3

Figures
c
. 2-1. 3290 Display
Screen 2-1
2-2. Character Cells (9 x 15 Size) 2-2
2-3. 7 x 9 Character Matrix in 9 x 15 Character Cell 2-3
3-1. Screen Divisions 3-1
3-2. IBM-Supplied Logical-Terminal Definition Table 3-3
3-3. IBM-Supplied Default Logical-Terminal Sets 3-5
3-4. Allowable Screen Divisions for Given Usable Areas 3-5
3-5. Allowable Usable Areas for Programs Written for 3278 Models 2. 3. 4. and 5 3-5
3-6. Maximum Number of Logical Terminals 3-6
3-7. Setup Level 3 Display 3-12
3-8. Character Cell Sizes 3-15
3-9. Specification Options for Byte 24 of the Bind Command 3-16
3-10. Data Copied for Operator-Initiated Local Copy 3-21
3-11. Data Copied for Host-Initiated Local Copy 3-22
4-1. United States EBCDIC 1/0 Interface Code 4-2
4-2. EBCDIC Control Character 1/0 Codes 4-3
4-3. Field Attribute Character Bit Assignment 4-4
4-4. Write Control Character (WCC) Reset Actions 4-8
5-1 . 3290 Controls 5-1
6-1. 104-Key Typewriter Keyboard Layout 6-2
6-2. APL Keyboard Layout 6-2
6-3. 3290 Keypad - Program Function Layout 6-4
6-4. 3290 Keypad - Calculator Layout 6-5
A-1. IBM-Supplied Values for Logical-Terminal Set C A-8
Figures ix

Frontispiece. IBM 3290 Information Panel
x

Chapter 1. Introduction
C
;
. The IBM 3290 Information Panel (Frontispiece) uses the 3270
data stream as
described in the IBM 32 70 Information Display System Data Stream
Programmer's Reference, GA23-0059. Refer to that publication for 3270 data
stream information. This publication lists only the 3270 data stream functions
supported by the 3290 and describes only those implementation differences that
are unique to the 3290.
The 3290 interacts with host programs written for the 3270 displays. In terms of
screen management facilities, keyboards, methods of highlighting, and peripheral
device attachment, there are operational differences between the 3290 and other
3270 displays. See your IBM representative for any compatibility differences.
The 3290 supports the multiple interactive screens and multiple copy screens
functions. These functions allow the operator to benefit from the larger 3290
screen, using existing 3270 host programs as well as new programs. The multiple
interactive screens function allows the 3290 to operate as up to four logical
displays, each interacting independently with its own host program. The multiple
copy screens function allows the 3290 operator to initiate a copy of the active
screen to one of up to three copy screens and to retain the copies for reference.
With new or modified 3270 host programs, the 3290 displays large screens (up to
9920 characters), and multiple (up to 16) partitions, with or without vertical
scrolling. The 3290 interacts with structured-field data-stream functions.
Although a monochromatic display, the 3290 accepts the structured-field (color)
codes and returns them unchanged on a subsequent read operation.
The 3290 operates in the systems network architecture (SNA) and non-SNA
environments. For SNA support, virtual telecommunications access method
(VTAM) must be Advanced Communication Function (ACF)/VTAM, Release 1
or later, and telecommunications access method (TCAM) must be Version 2,
Release 3 or later. In the SNA environment, the 3290 is a logical unit (LU) type
2 device, attached to a physical unit (PU) type 2 control unit. In a binary
synchronous communication (BSC) environment, transparency must be used with
structured fields or with extended attributes.
The 3290 can be attached to the IBM 3274 Control Unit. (See the IBM 3270
Information Display System Feature Description, GA23-0113, for the 3274
models to which the 3290 can be attached and for the necessary 3274 features
and support.) When attached to the 3274 Control Unit, the 3290 is a Category A
terminal that attaches to a type A port (except port AO).
Certain 3290-unique information is stored on the 3290 load diskette in the 3274
unit. This diskette must be placed in the 3274 diskette drive when any attached
3290s are to be used, because each time an attached 3290 is switched on (and at
other times mentioned in this manual) the 3274 must provide a downstream load
of this information from the diskette to the 3290.
The 3274 monitors and controls communication between the attached 3290s and
the host system. See the IBM 3270 Information Display System 3274 Control
Unit Description and Programmer's Guide, GA23-0061, for local operations,
remote BSC operations, and SNA/synchronous data link control (SDLC)
communication.
Chapter 1. Introduction 1-1

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Chapter 2. Display Characteristics
The display element of the 3290 includes a plasma panel as a display screen. The
display space of the screen permits the display of individual picture elements
(PELs) in a contiguous matrix of 960 PELs in the horizontal direction and 75 l
PELs in the vertical direction. The display space is the area above the separator
line for the operator information area. (See Figure 2-1.) The contiguous matrix
permits the size, spacing, and location of alphanumeric text and programmed
symbol (PS) characters to be varied in both the horizontal and vertical directions.
Up to 62 rows of 160 columns are displayed in the display space, for a maximum
of 9920 characters.
960 PE Ls 1160 columns)
Usable Area
751 PELs
(62 rows)
Separator Line
Operator
---------------------- Information
..._~~~~~~~~~~~~~~~~~~~~~-" Area
Figure 2-1. 3290 Display Screen
Chapter 2. Display Characteristics 2-1

Character Cell
2-2
A character cell is a rectangular array of PELs, in the display space, that tf
represents the maximum physical boundary for a single character. Whatever i.,;.
character cell size is used, the character cells are contiguous both horizontally and
vertically on the 3290 screen.
Allowable character cell sizes range from 6 x 12 to 12 x 31 PELs. See Figure 2-2
for an example of an allowable size. How the character cell sizes are determined
under various conditions is described in Chapter 3.
I I I I
-·-----------r----------~-----------•-
' I
I
I
I
, 9 ~ 15 Character Cell ,
...,.---------- ....................... ,_
I
t···i •.. -.
-·-----~ v~-;_
--- Adjacent Celts
I I
I I
-•-----------r----------~----•-••--••-
1 I I I
Figure 2-2. Character Cells (9 x 15 Size)
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Character Matrix
A character matrix is a rectangular array of PELs that represents the minimum
rectangular matrix necessary to display the uppercase E character for a given
character set. The character matrix.es for the two 3290 character sets are 5 x 8
and 7 x 9.
The 7 x 9 character set is used in character cells whose width is greater than or
equal to 9, and whose height is greater than or equal to 15 (see Figure 2-3). The
5 x 8 character set is used in character cells smaller than 9 x 15.
9 x 15 Character Cell
9
-1
15
Space for Diacritics
7 x 9 Character Matrix
Space for Cursor, Descenders,
Underline, and Underscore
Figure 2-3. 7 x !> Character Matrix in !> x 15 Character Cell
Because the character cells are contiguous on the display screen, the size
relationship between the character matrix and the character cell determines the
vertical and horizontal spacing between characters. Characters can be densely
packed or opened up for greater legibility through the proper choice of character
cell size and character matrix size.
The allowable combinations of character cell size and character matrix size allow
one or more PEL rows above the character matrix for the diacritics associated
with some national languages, and one or more PEL rows beneath the character
matrix for the cursor, for an underline, for an underscore, and for the descenders
of certain lowercase alphabetic characters. Figure 2-3 illustrates a 7 x 9 character
matrix within a 9 x 15 character cell, and shows the intercharacter spacing and
the allowance for diacritics, descenders, etc.
Screen Layout and Addressing
Regardless of the sizes of the character cell and character matrix, character
locations on the screen are addressed by buffer displacement, starting with 0,0 in
the upper left of the screen area involved. See the IBM 3290 Information Panel
Screen Management Form, GX27-0028. See Chapter 4 for a discussion of how to
determine buffer addresses.
Chapter 2. Display Characteristics 2-3

Ii
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Chapter 3. 3290-Unique Functions
This chapter describes those functions that .are unique to the 3290:
Multiple interactive screens
Multiple copy screens
Setup
Zoom
Rule
Image limit
RowIcolumn indicator
Logical-terminal identifier
3290-unique aspects of the local copy function
These functions are largely operator-controlled.
Multiple Interactive Screens Function
The multiple interactive screens function provides the capability of using the 3290
as up to four co-resident interactive logical terminals. Each logical terminal can
interact independently with its own host application program. To make use of this
capability, the proper number of logical-terminal addresses must have been
customized for the port to which the 3290 is attached. (See "Customizing for the
Multiple Interactive Screens Function.")
When the multiple interactive screens function is used, the display space (above
the separator line) can be undivided, divided into equal halves vertically or
horizontally, or divided into equal quarters, as in Figure 3-1.
160 80 80 160
31~
31~
80 80
31CD
31CD
Note: The numbers shown indicate the dimensions of the screen areas in characters
(assuming a 6 X 12 character cell size).
Figure 3-1. Screen Divisions
Each of these screen areas can contain a logical screen that displays the data
associated with a logical terminal.
The logical screen containing the cursor is the active logical screen and accepts
operator input. The keyboard and the symbols in the operator information area
relate to the active logical screen. Only one logical screen can be the active
logical screen. If more than one logical screen is displayed, the operator can make
another logical screen the active logical screen by pressing the Jump Screen key.
(When only one logical screen is displayed, the Jump Screen key has no effect.)
The cursor moves from the current cursor position of the logical screen currently
active to the current cursor position of the next clockwise logical screen, which
then becomes the new active logical screen. The host programs interact with the
logical screen for any defined logical terminal, whether it is active or inactive. It
is possible for the logical screen associated with a logical terminal not to be
physically displayed. At least one logical screen must always be displayed. The
Chapter 3. 3290-Unique Functions 3-1

operator specifies which logical terminals will have their logical screens displayed.
(Refer to "Setup Mode".) A logical screen that is not displayed is placed in the
background queue.
When a logical screen is placed in the background queue, the host can still interact
with its logical terminal; but, for the operator to see the logical screen or to
interact with it, the logical screen must be displayed as a foreground screen. This
is accomplished by pressing the Change Screen (Chg Sc) key. If no background
logical screen exists, the Change Screen key has no effect. Each time the Change
Screen key is pressed, the active logical screen is placed at the bottom of the
background queue and the top logical screen from the background queue is
displayed as a foreground screen in its place.
Customizing for the Multiple Interactive Screens Function
See the IBM 3270 Information Display System 3274 Control Unit Planning.
Setup, and Customizing Guide, GA27-2827 (Configuration Support T), or the
IBM 3270 Information Display System 3274 Control Unit Customizing Guide,
GA23-0065 (Configuration Support D). 3290s can be attached to any type A
ports except port AO (only a 3278 or 3279 can be attached to port AO).
For non-SNA 3274s, the maximum allowable number of logical-terminal
addresses is 31. For SNA 3274s, the maximum allowable number of
logical-terminal addresses is 128.
It is expected that users will customize three or five logical-terminal addresses
when existing programs (smaller screens) are to be intermixed with a new
program using a large screen. Those using only existing programs will probably
customize two or four logical-terminal addresses.
Logical-Terminal Definition Table
3-2
The logical-terminal definition table (Figure 3-2) is supplied by IBM as a part of
3290 support. The table is downstream-loaded to the 3290 (from the load
diskette placed in the 3274 diskette drive) whenever it is powered on and at other
times, as described later.
The logical-terminal definition table defines six labeled logical-terminal sets
( A , B , c , o , E, and F ), each having provision for four logical-terminal
definitions. Each logical-terminal definition can differ from the definitions for
the other logical terminals, but the sum of the resources allocated to any
logical-terminal set cannot exceed the resources available to the physical 3290.
The contents of the IBM-supplied logical-terminal definition table can be
modified, either temporarily, for this 3290, or permanently (with the use of a
password), for all attached 3290s. (See "Setup Level 3" for an explanation.)
The contents of the logical-terminal definition table must meet the criteria
specified in the text that follows Figure 3-2.

c
Logical- Alt Char. No. of Logical-
Terminal Screen Ce JI Extended Part i-
ScroI I Num
Terminal
Set Label
Size Size Attributes PS
tions
Enable Lek ID
1 2 3 4 5 6 7 8
A 24x080 06x15 1 6
08 1 0
LT-1
24x080 OOxOO 1 0 08 1 0
LT-2
24x080 OOxOO
1 0 00 0 0
LT-3
24x080
OOxOO 1 0 00 0 0
LT-4
B 31x160 OOxOO
0 0 08 1 0 LT-1
31x160
OOxOO 0 0 08 1 0 LT-2
31x160 OOxOO
0 0 00 0 0 LT-3
OOxOOO OOxOO 0 0 00 0 0
c 62x160 06x12 1 6
16 1 0 LT-1
OOxOOO OOxOO
0 0 00 0 0
OOxOOO
OOxOO 0 0 00 0 0
OOxOOO OOxOO
0 0
00 0 0
D 32x080
OOxOO 1 6 08 1 0 LT-1
32x080 OOxOO 1 0 08 1 0 LT-2
OOxOOO OOxOO 0 0 00 0 0
OOxOOO OOxOO 0 0 00 0 0
E 24x080 09x15 1 6 08 1 0
LT-1
24x080
OOxOO 1 0 00 0 0 LT-2
27x132 OOxOO 1 0
08 1 0 LT-3
OOxOOO OOxOO
0 0 00 0 0
F 43x080
OOxOO 1 6 08 1 0
LT-1
43x080
OOxOO 1 0 08 1 0 LT-2
OOxOOO
OOxOO 0 0 00 0 0
OOxOOO OOxOO
0 0 00 0 0
Figure 3-2. IBM-Supplied Logical-Terminal Definition Table
Following is an explanation of the contents of each column of this table and of
the criteria that apply when the contents are modified.
Logical-Terminal Set Label (A, B , c , o , E , and F ). Each logical-terminal set
is associated with a default screen division and usable area. The usable area is the
amount of display space allocated to a logical screen. The usable area specified
determines which screen divisions are allowed. The IBM-supplied defaults for
both usable area and screen division are as follows:
AEE
Quarter screen
BB
Horizontal half
co
Full screen
o[D
Vertical half
E B Horizontal
half
F
rn
Vertical half
Chapter 3. 3290-Unique Functions 3-3