Data General Dasher D461 User manual

OASHER@ 0411 and 0461
OISPLA Y TERMINALS
USER'S MANUAL
t.DataGeneral
Ordering NO. 014-001161-01

Technical Specifications
Functional
Display Unit
Keyboard
Screen Phosphor
Screen Refresh Rate
Display Technique
Characters
Character
Sets
Display Scrolling
Self-Test
Communication
Interface Types
Baud
Rates
Data Format
Printer
Baud Rate
Physical
Display Unit Dimensions
Keyboard Dimensions
Tabletop, tiltable mounting; 305-mm (12-in.) diagonal
screen
with 211-mm (B.3-in.) by 150-mm (5.9-in.)
viewing area; 24 lines by Bl characters per line or 24 by
135 characters per line
Low-profile, independent
tabletop mounting with
sculptured keys; multi-key rollover; typematic and
manual repeat; 5 basic keypad groups; on-line, alpha-
lock, and hold lamps
Amber or P31 green
60 frames per second (domestic 60 Hz), 50 frames per
second (foreign 50 Hz)
Noninterlaced raster
lOx 12 dot-matrix character cell
U.S., U.K., French, German, Swedish/Finnish, Spanish,
Danish/Norwegian, Swiss, DG International, Katakana
and
word processing, math, line drawing, and
superscript/subscript symbots
One-row increments (jump scrolling), or smooth at 5
rows per second or 10 rows per second
On power-up, program verifies terminal is operational
Asynchronous serial, full-duplex; RS-232-C; RS-422-A or
20-mA current loop; Xon/Xoff protocol
110, 150, 300, 600, 1,200, 1 ,BOO, 2,400, 4,BOO, 9,600,
and 19,200 baud (EIA RS-232-C and RS-422-A; 110-
9,600 (20-mA))
ASCII; 7- or B-bit characters; mark, even, odd, or
no parity; one stop bit DG
or ANSI (switch selectable)
Second interface for serial ASCII-based or graphics dot-
matrix printer; EIA RS-232-C compatible; 110, 150, 300,
600, 1200, 1
BOO, 2400, 4BOO, 9600, and 19200 baud.
Height: 34 cm (13.1 in.); Depth: 32.7 cm (12.B in.);
Width: 32.7 cm (12.B in.)
Height: 4.4 cm (2.4 in.); Depth: 19.6 cm (7.5 in.);
Width: 51.9 cm (20 in.)
(Technical Specifications are continued on the inside back cover.)

DASHER® D411 and D461
DISPLAY TERMINALS
USER'S MANUAL
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.
It
has been tested and found to comply with the limits for Class A
computing devices pursuant to Subpart J
of Part 15 of FCC Rules, which
are designed to provide reasonable protection against such interference
when operated in a commercial environment. Operation
of this
equipment
in a residential area is likely to cause interference, in which
case the user,
at his own expense, will be required to take whatever
measures may be required to correct the interference.
-. DataGeneral

Notice
Data General Corporation (DGC) has prepared this document for use by DGC personnel,
customers and prospective customers. The information contained herein shall not be reproduced
in whole or in part without DGC's prior written approval.
DGC reserves the right to make changes in specifications and other information contained in
this document without prior notice, and the reader should in
all cases consult DGC to determine
whether any such changes have been made.
THE TERMS AND CONDITIONS GOVERNING THE SALE OF DGC HARDWARE
PRODUCTS AND THE LICENSING OF DGC SOFTWARE CONSIST SOLELY OF THOSE
SET FORTH IN THE WRITTEN CONTRACTS BETWEEN DGC AND ITS CUSTOMERS.
NO REPRESENTATION OR OTHER AFFIRMATION OF FACT CONTAINED IN THIS
DOCUMENT INCLUDING BUT NOT LIMITED TO STATEMENTS REGARDING
CAPACITY, RESPONSE-TIME PERFORMANCE, SUITABILITY FOR USE OR PER-
FORMANCE OF PRODUCTS DESCRIBED HEREIN SHALL BE DEEMED TO BE A WAR-
RANTY
BY DGC FOR ANY PURPOSE, OR GIVE RISE TO ANY LIABILITY OF DGC
WHATSOEVER.
IN NO EVENT SHALL DGC
BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL
OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED
TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS DOCUMENT OR THE
INFORMATION CONTAINED IN IT, EVEN IF DGC HAS BEEN ADVISED, KNEW OR
SHOULD HAVE KNOWN OF THE POSSIBILITY OF SUCH DAMAGES.
CEO, DASHER, NOV A, microNOVA, and ECLIPSE are U.S. registered trademarks of Data
General Corporation.
Ordering No. 014-001161
Copyright © Data General Corporation, 1985
All Rights Reserved
Printed in Thailand
Rev. 01, March 1986

Preface
This DASHER® D411 and D461 Display Terminal User's Manual
provides an overview of the terminal's features and contains installation
and operating instructions. This manual
is divided into chapters and
appendixes
as follows:
Chapter/
Appendix
Product Overview -Introduces features and capabilities
of
both models of the terminal.
2 Installation -Provides the site requirement, repacking,
installation, and checkout instructions for the terminal.
3 Operation -Describes the terminal controls and indicators
with emphasis on the keyboard; includes terminal operating
procedures that are independent
of the host computer, and
closes with a short paragraph on operator maintenance.
A Display Screen Format and Coordinate System
B ASCII D411/D461 Code Sequences
C Summary
of D411/D461 Commands
D D411/D461 Argument Formats
E D411/D461
U.S. ASCII Functions and Conversions
F D411/D461 ANSI Modes
of Operation
Related Publications
The following documentation contains additional information on the
DASHER
D411 and D461 Display Terminals:
• DASHER D411 and D461 Display Terminal Programmer's Reference
Manual, ordering number 014-001162
• DASHER D411 and D461 Display Terminal Installation Data
Sheets, ordering number 010-001126

How To Use This Manual
Users unfamiliar with the capabilities of the D411/D461 terminal will
want to begin with Chapter
1, the product overview. Since the best way to
learn about your terminal is through hands-on experience, refer to Chapter
2 for installation instructions to get your terminal up and running. The
checkout procedures in Chapter 2 will help you determine
if your terminal
is working properly.
Finally, turn to Chapter 3 for operation instructions.
This manual
is carefully indexed for your convenience. Seek help in the
index, at the back
of the manual, if you have trouble locating specific
information. You
will also find the glossary useful in defining unfamiliar
terms.
Appendixes
A, B, C, and D contain abbreviated programming information.
If you plan to write host-resident software for the D411/D461 terminal
and need more detailed programming information, refer to the DASHER
D411/D461 Display Terminal Programmer's Reference Manual.

Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-1
Product Features ..................................... 1-2
Display-Screen Management ...... : ................ 1-3
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-4
Character Spacing . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-5
Display Scrolling . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-5
Margins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-6
Editing Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-6
Character Attributes. . . . . . . . . . . . . . . .. . . . . . . . . . . . .. 1-7
Command Syntax Modes. . . . . . . . . . . . . . . . . . . . . . . . .. 1-7
Character Sets .................................. 1-8
Print Methods .................................. 1-9
Extended Character Set .. . . . . . . . . . . . . . . . . . . . . . . . .. 1-10
Product Description .................................. 1-11
Display Unit .................................... 1-14
Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-15
System Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-18
On-Line Operation ............................... 1-18
Off-Line Operation ............................... 1-20
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-1
Site Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-1
Repacking .......................................... 2-2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 2-2
Operational Checkout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 2-16
Self-Test and Off-Line Checkout
.................... 2-17
On-Line Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-23
Off-Line Printer Checkout
......................... 2-23
User Maintenance .................................... 2-24
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 3-1
Display Unit Controls and Indicators ..................... 3-1
Terminal Power-Up/Power-Down Procedures .............. 3-3
Power-Up Procedure ............................. 3-3
Power-Down Procedure . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-3
Terminal Operating Procedures ......................... 3-4
On-Line Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-4
Off-Line Operation ............................... 3-4
Keyboard Controls and Indicators . . . . . . . . . . . . . . . . . . . . . .. 3-6
Main Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-8
Screen-Management Keypad ...................... , 3-13

User-Function Keys .................. , ............ 3-16
Numeric Keypad
.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-16
Local-Function Keys
............................. 3-16
Mouse and Digitizer Operation
......................... 3-21
Downloading User-Defined Character Sets ................. 3-22
Display Screen Row/Column Format
...............•..... A-I
Display Screen Coordinate System . . . . . . . . . . . . . . . . . . . . .
.. A-I
ASCII D411/D461 Code Sequences (Data General Operation)
B-1
ASCII D411/D461 Code Sequences (ANSI Operation). . . . . . .. B-3
Command/Argument Formats in Data General Mode. . . . . . .. D-1
Graphics Location/Height/Width Arguments. . . . . . . . . . . . . .. D-2
Select Character Set Command Arguments
................ D-3
Glossary
Index
Figures
1-1 DASHER D411/D461 Display Terminal .......... 1-2
1-2
Display-Screen Memory ....................... 1-5
1-3 D461 Terminal Graphics ...................... 1-11
1-4 D411/D461 Terminal System Configuration ....... 1-14
1-5 D411/D461 Terminal Keyboard Layout .......... 1-17
1-6 D411/D461 Terminal and Host Computer
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 1-19
2-1 Rear View of D411/D461 ' ..................... 2-3
2-2 Rear View and Connectors
of the D411 and D461 .. 2-4
2-3 Data General EIA RS-232-C Terminal Interface . . .. 2-7
2-4 RS-422-A Host/Controller
Cable. . . . . . . . . . . . . . .. 2-8
2-5 Termination Details for Non-DG Shielded Cables. .. 2-9
2-6 Data General20-mA Current Loop Terminal
Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 2-10

2-7 Menu for Terminal Communication Option Settings 2-13
3-1 Display-Unit Contrast Control .................. 3-2
3-2 Terminal Keyboard .......................... 3-6
3-3 Main Keypad ............................... 3-8
3-4 Screen-Management Keypad and User-Function
Keys
...................................... 3-14
3-5 Numeric Keypad and Local-Function Keys ........ 3-17
3-6 Print Menu ................................. 3-19
Tables
1-1 Foreign Language Character Sets. . . . . . . . . . . . . . .. 1-8
1-2
D411/D461 Print Methods for Data General Syntax 1-9
1-3
D411/D461 Terminal Component Model Numbers 1-12
1-4 Keyboards Supported by the D411/D461 Terminal 1-16
2-1 D411/D461 Default Terminal Configurations
Settings
................................... 2-12
2-2 Enabling Terminal Configuration Menu Settings. .
.. 2-15
2-3 Terminal Off-line Checkout And Demonstration
Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 2-17
2-4 Terminal Problem Diagnosis . . . . . . . . . . . . . . . . .
.. 2-25
3-1 SPCL Key Sequences ......................... 3-11
3-2 Terminal Reset Conditions .................... 3-15
B-1 ASCII D411/D461 Code Sequences (Data General
Operation)
................................. B-2
B-2
ASCII D411/D461 Code Sequences (ANSI
Operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. B-4
C-l D411/D461 Commands in Alphabetical Order (DG
Operation)
................................. C-l
C-2 D411/D461 Commands in Octal Code Order (DG
Operation)
................................. C-7
C-3 D411/D461 Commands in Alphabetical Order
(ANSI Operation)
........................... C-ll
C-4 D411/D461 Commands in Octal Code Order (ANSI
Operation)
................................. C-14
D-l Command Argument Format (DG Mode)
......... D-l
D-2 Graphics Location/Height/Width Arguments
...... D-2
D-3 Select Character Set Command Arguments ........ D-3
E-l D411/D461 ASCII Functions and Conversion. . . . .. E-2
F-l D411/D461 Fixed ANSI Modes of Operation . . . . .. F-l
F-2 D411/D461 Selectable ANSI Modes
of Operation ... F-2

This chapter provides an overview of the D411/D461 Display Terminal.
The information in this chapter is organized as follows:
• Product features
• Product description
• System operation overview
Introduction
The DASHER® D411 and D461 Display Terminals (Figure 1-1) are
desk-top, 12-inch, green or amber monochrome terminals containing
many advanced features that combine to improve productivity in a
business or dataprocessing environment. These features include four
separate operating modes, display-screen windows, bidirectional vertical
and horizontal scrolling, built-in editing functions,
81- and 135-column
character viewing, protected character fields, a printer/mouse/digitizer
port, etc.
The D461 terminal
is identical to the D411 terminal with one major
addition: the D461 includes a downline loadable (DLL) memory or soft
character set feature that provides for user-defined characters and basic
drawing functions that make the display and printing
of graphics
possible. Both the D411 and D461 terminals are intended to be
connected to any host computer system that supports full-duplex
communications via a
20 rnA current loop or EIA RS-232-C compatible
interface and uses Xon/Xoff protocol. An EIA RS-422 interface
is
provided as an alternative to current loop for long lines. This interface
does not conform to the associated RS-449 mechanical standard. The
terminal's EIA RS-232-C interface can be used at a remote site in
conjunction with
Bell 103, 113, or 212 compatible modems and an
available telephone system.
Throughout this manual, the term D411/D461 terminal
is used
whenever the current topic
is common to both the D411 and D461
terminals. .
Product Overview 1-1

Figure 1-1. Dasher 0411/0461 Display Terminal
Product Features
The basic 0411/0461 terminal consists of a CRT display unit and a
keyboard as shown in Figure
1-1. The display unit, mounted on a
tiltable base, and the detached, sculptured keyboard combine to provide
maximum flexibility in viewing and keyboard access for the operator.
The
0411/0461 terminal can be configured in a United States version,
two Canadian versions, a Japanese version, or in eight European
versions.
It offers the option of operating in either Data General
command syntax or in the American National Standards Institute's
(ANSI) standard command syntax. The terminal can operate in four
different command syntax modes: two
of the modes are compatible
with previous command sets used with Data General display terminals,
and the other two meet ANSI standards. A special key provides, in three
1-2 Product Overview

of the four modes, the option of conveniently creating any of 45
different international characters immediately, regardless of keypad
nationality.
The
0411/0461 terminal introduces three important features to the
Data General
0400 series of terminals. First, terminal communication
options such
as baud rate, data bits and parity are set from the
keyboard rather than by DIP (dual-in-line package) switches. The
possible settings for the communication options are presented in a
menu called up on the screen by simultaneously pressing the CMO and
N/C
keys. Second, the 0411/0461 terminal has a screen-saver feature
called "Auto Screen Dim." This feature automatically blanks the screen
15, 30, 45, or 60 minutes after reset or after the last key has been
struck. Third, the
0411/0461 offers integral support for the Japanese
Katakana character set. This means that, unlike the
0410/0460
terminal, a separate Katakana version of the display unit is not needed
to
use this character set.
The next
few sections highlight the more important features of the
D411/0461 terminal. Keep in mind that the
0411/0461 terminal,
which includes significant advances over the
0400/0450 terminal, is
also compatible with the DASHER 0200 Display Terminal. This allows
you to disconnect a
0200 terminal and replace it with the 0411/0461
without making hardware or software changes. You can then take
advantage
of the added features of the 0411/0461 as your current
software
is modified or replaced.
All of the features described in the next few pages are programmable.
That
is, they can be exercised on command from a host computer. The
0411/0461 terminal command set is both versatile and easy to use,
simplifying the implementation
of terminal features in various
applications. Some
of the features can be controlled directly from the
keyboard. These features
will be pointed out as they are discussed.
Display-Screen Management
The screen-management capabilities of the 0411/D461 terminal are
listed below.
• Up to 24 scroll areas, or windows
• Normal (81-cohimn) and compressed (135-column) character
viewing (spacing)
• Programmable margins
Product Overview 1-3

• Vertical. (bidirectional) smooth scrolling
• 208-column horizontal scrolling
• Graphics cursor for graphics-input devices such as mouse and
digitizer (0461 only)
Windows
When the 0411/0461 terminal is turned on, the display screen is
organized into 24 character rows with 80 character positions in each
row. The window feature makes it possible to divide the full screen into
multiple miniature screens along character row boundaries. Each
window
is formed by a consecutive number of character rows. The
smallest window may consist
of one row and the largest window may
consist
of 24 rows.
Only one of the windows on the display screen is treated as "active" or
"current." This is the window you are working on at the time. The
other windows are inactive, and may display data from the same file or
from different
files. You'll find the window feature helpful for
separating areas
of a form, for comparing the contents of two or more
data
files, or in any application where you need display-screen
segregation.
The active window contains the display-screen alphanumeric cursor.
The cursor marks the position on the display screen that will hold the
next character for display from either the host computer or the user at
the keyboard. The host computer can easily reassign the active window
by moving the cursor across window boundaries.
1-4 Product Overview

Character Spacing
The D411/D461 terminal is equipped with an extended display screen
memory that contains 208 characters in each
of the 24 rows, as shown
in Figure
1-2. You can select normal (81-column) or compressed (135-
column) character viewing (spacing)
on a screen basis. Normal character
spacing is similar
to that of the earlier Model D200 terminal, and allows
you to build 2-1/2 full screens
of data side by side in display-screen
memory. Compressed character spacing will let you view all columns
of
a wide form (up to 135 columns) at one time.
Column
Row o 207
1
or-----------------~----------------~
Display Screen Memory
23~ ________________ ~ ________________ ~
AA-0601
Figure 1-2. Display-Screen Memory
Display Scrolling
Left and right horizontal scrolling of the active window lets you see all
208 columns of the display-screen memory. You can scroll vertically
both
up and down in the window in three styles: slow and fast smooth,
and fast jumpy. Each style is both keyboard-selectable and command-
selectable. Slow smooth scrolling rolls the screen up
or down at the rate
of 5 character rows (60 raster lines) per second, fast smooth or jumpy
scrolling at 10 character rows (120 raster lines) per second. You can halt
Product Overview 1-5

and resume vertical scrolling at any time from the keyboard. Smooth
scrolling coupled with screen freeze makes it easy for you to scan
or
read through information on the screen.
Margins
The active window combines with the programmable margins feature to
define the working area on the display screen. Window boundaries are
the upper and lower boundary lines running across the display screen at
the top and bottom
of each window; margins are the left and right
boundary lines. Movement
of the display-screen cursor is restricted to
the area between the margins in the active window. Attempting to
position the cursor beyond the edge
of a window results in the cursor
pegging at the margin. The margin settings extend across window
boundaries; this means only one set
of margins is in effect at any time.
An alternate margin feature makes it possible to assign a second set
of
margins while saving the normal margins for future use.
When the
0411/0461 terminal is turned on, the left and right margins
are set to columns 0 and 79, respectively. You can resest the margins
easily under host computer control to any
of the columns in the range
of 0 to 207. The only restriction on margin assignment is that the left
margin column number be no greater than the right margin column
number. When the left and right margins are the same, the working
area in the active window is one column wide.
Editing Functions
The D411/0461 terminal includes special built-in editing features that
provide for easy and fast reorganization
of characters on the display
screen. Highlights
of the editing features include:
• Insert/delete individual characters or complete lines. This feature
cuts down on host/terminal character traffic by making these
editing operations possible without rewriting part or all
of the
display screen.
• Besides the conventional screen- and line-erase capabilities, the
0411/0461 terminal is equipped with window-erase and
unprotected-text-erase commands. These commands complement
the window and protected text features
of the terminal.
1-6 Product Overview

Character Attributes
Every character position on the display screen has four display attributes
plus a protect attribute.
The display attributes are valuable for character highlighting. Each
character displayed on the screen can be underscored, dimmed, made to
blink, or displayed in reverse-video form independently
of all other
characters. These four attributes can be applied in all combinations. A
special feature allows you to change with one command the display
attributes for all characters in the active window.
When on, the protect attribute prevents the destruction
of a character
field by the keyboard operator using normal cursor-related commands.
The cursor will skip over protected characters on the screen
so that
critical character fields (fixed information on a form, for example) are
preserved. You can delete protected text with the Erase Screen or Erase
Window commands, which are generally restricted to the host
computer's use.
Command Syntax Modes
The Data General D411/D461 terminal otTers the choice of four modes
of command syntax operation: Data General 7-bit, Data General 8-bit,
ANSI 7-bit, and ANSI 8-bit. These modes, along with other terminal
communication options, are selected via the Terminal Configuration
menu accessed by pressing the CMD and
N/C keys simultaneously. The
terminal
will be configured with default settings at the factory. These are
values that will be assigned automatically unless you make another
selection. Upon power-up or when the terminal goes on-line, the
terminal
will default to DG 8-bit mode. See Chapter 2 for default values
for all the communication options and for details on setting these
parameters. Software switches override both the Data General!ANSI
setting and the
7- or 8-bit-mode setting so the command syntax mode
can
be changed dynamically by the host system. This feature maintains
the terminal's compatibility with existing OS (Operating System)
support for Data General terminals wh!le allowing use
of industry-
standard code sequences involving ANSI 3.4, 3.41, and 3.64
environments.
Product Overview 1-7

Character Sets
The character sets available for the D411/D461 terminal are:
• United States ASCII
• Foreign language character sets (see Table. 1-1)
• Greek alphabet subset
• Extended math symbols
• Line-drawing character set
• Word-processing symbols
• Superscripts and subscripts
Any
of these character sets can be selected for display on command
from the host computer.
Table 1-1. Foreign Language Character Sets
U.K.
French
German
Katakana
Swedish/Finnish
Spanish
Danish/Norwegian
Swiss
Data General International
When the terminal is powered up, your display unit senses the
nationality
of the keyboard and selects the matching character set for
display. This
is a default selection, however, and you retain the option
of selecting any of the other character sets.
The line-drawing character set
is not the same as the graphics-drawing
features
of the D461 terminal that will be discussed later in this chapter.
The line-drawing character set makes it possible for you to build a
simple graphics image by positioning line-drawing symbols in selected
patterns on the screen.
1-8 Product Overview

Print Methods
The 0411/0461 terminal supports local, ASCII-based serial printers.
Table
1-2 shows the six different print methods available in the Oata
General mode on the
0411/0461 terminal and the commands
supported by each.
See your programmer's reference manual for details
about each command.
Table 1-2.
0411/0461 Print Methods for Data General Syntax
Method Commands Supported
ASCII text Print Window
Print Form
Bit-image screen
Window Bit Dump
dump test Form Bit Dump
ASCII print
pass through Print
Pass Through
ASCII Simulprint ASCII Simulprint
The standard ASCII character sets for the U.S. and the sets for the other
countries mentioned earlier can be printed using commands under the
ASCII text method. User-defined characters and the special-symbol
character sets (those containing the word-processing, math, Greek
alphabet, superscript/subscript, and line-drawing symbols) can be
printed using commands under the Bit Image Screen Oump method
if a
graphics serial printer
is connected. User-defined characters, discussed in
the next section, are unique to the 0461 terminal. In the ASCII Print
Pass Through method, all characters received over the host link are
transmitted to the printer without being displayed on the terminal
screen. In the ASCII Simulprint method, all characters received over the
host link are transmitted to the printer and simultaneously displayed on
the screen.
Similar printing functions can
be obtained using a command in ANSI
mode; the Media Copy command used in conjunction with either the
set or reset state
of the Forms mode and the Guarded Area Transfer
mode initiates printing and controls the print method. A variation
of
this same command causes a bit-image dump to be sent to the printer.
Product Overview 1-9

As explained earlier, the margins for the D411/D461 terminal can be set
to a maximum width
of 208 columns (character positions), so the
D411/D461 terminal can produce lines
of up to 208 characters long.
Whether lines
of this length can be printed depends upon the
capabilities
of the printer.
Extended Character Set
The D461 terminal includes an extended character set, downline
loadable (DLL) memory not included with the D411 terminal. The
DLL memory can store up to 3,572 user-defined or custom character
definitions at
anyone time. These 3,572 characters are grouped into 38
sets of 94 characters each. When the D461 terminal is turned on, these
38 character sets do not contain any custom characters. To install
custom characters in the terminal, you must download (transfer) their
definitions from the host computer.
After you have downloaded one or more custom character sets, you
may select the custom sets for display or printing just like the standard
character sets in the D411 terminal. Custom characters can be displayed
with normal and compressed character spacing.
The DLL feature can also be used by the D461 terminal to produce
graphics. A graphic image
is developed using two basic drawing
elements: straight lines and bars (solid rectangles). The bars are either all
green (amber on Model 6347A) or all black; the lines can be solid green
or amber, solid black, dashed, dotted, or any pattern
of green or amber,
and black desired. The drawing algorithms in the terminal define their
own custom characters in the DLL character sets and combine the
custom definitions on the screen to draw the desired lines and bars.
Figure
1-3 shows an example of how line segments can be combined to
produce effective business charts.
The graphics cursor, available on the D461 terminal,
is a positioning
device used to select particular picture elements (pixels) on the screen.
The easiest way to control the movement
of the cursor is via a mouse
or digitizer. An alternate way, however,
is with the cursor-control keys
on the keyboard. The Cursor Tracking command allows you to select
the method
of cursor control.
1-10 Product Overview