burroughs TD 730 User manual

Burroughs m
I
I
PR ICi:D ITEM
P rinted In U. S.A .
Nov ember 1979
1093788

Printed in U.S.A.
Burroughs m
TD 730/TD 830
System
REFERENCE MANUAL
Copyright©1979 Burroughs Corporation, Detroit, Michigan 48232
PR ICi:D ITEM
November 1979 1093788

"The names used in this publication are not of individuals living or
otherwise. Any similarity or likeness of the names used in this publi-
cation with the names of any individuals, living or otherwise, is purely
coincidental and not intentional."
Burroughs believes that the information described in this
manual
is accurate and reliable, and much care has been
taken
in its preparation. However, no responsibility, financial
or otherwise,
is accepted for any consequences arising out of
the use of this material. The information contained herein is
subject to change. Revisions may be issued to advise of such
changes and/or additions.
This reprint includes the information released under the following:
PCN 1093788-001 (March 4, 1977)
PCN 1093788-002 (August 31,1978)
PCN 1093788-003 (October 15, 1978)
PCN 1093788-004 (May 3, 1979)
PCN 1093788-005 (March 20, 1980)
Correspondence regarding this document should be addressed directly to Burroughs Corporation,
P.O. Box 1408, Plainfield, N.J. 07061, Attn: Manager, Systems Hardware Support, TID-East.

TABLE OF CONTENTS
Section Title Page Section Title Page
INTRODUCTION
vii
Character Delete 3-8
GENERAL DESCRIPTION
1-1
Line Insert/Delete 3-8
General
1-1
Line Movement Up/Down 3-8
System Configurations
1-1
Clear to End-of-Line/Page 3-9
2 SYSTEM CHARACTERISTICS
2-1
Lower Case Enable/Disable 3-9
General Description
2-1
Search Mode (Item Correction) 3-9
Remote I/O
2-1
Data Highlighting Functions 3-9
Local
Input
2-2 Negative
Page Video 3-9
Keyboard 2-2 Field Video 3-9
Magnetic Card Reader 2-2 Blink Video (CAN) 3-10
Magnetic Tape Cassette 2-3
SecUre Video (EM) 3-10
Local Output 2-4 Reverse Video (SO) 3-10
Screen 2-4 Bright Video (SUB) 3-10
Auxiliary Printer 2-4 Underline Video (SI) 3-10
Magnetic Tape Cassette 2-4 Special Data Comm Features 3-11
Processing Characteristics 2-4 Numerical Control Message 3-11
Microprocessor, Firmware, and Cursor Position Transmission 3-11
Character Generator 2-4 Variable Data Transmission 3-11
Memory 2-4 Data Transmission by Page 3-11
Firmware Memory 2-4 Variable Start-of-Transmission
User Program Memory 2-4 Position (FW2 only) 3-11
3 SYSTEM CONCEPTS
3-1
XMT Page in Forms Mode
General Description
3-1
(FW2 only) 3-12
System Registers 3-1
CR Character Control
Status Line
3-1 (FW2 only) 3-12
Error Conditions
3-1
EXT Character Control
Error Log 3-1
(FW2 only) 3-12
Special Messages 3-2 HT Character Control
Page Number 3-2 (FW2 only) 3-12
Page 3-2 MCR Code Translation
Page Boundary Crossing 3-4 (FW2 only) 3-12
Format Functions 3-4 TTY Printer
CR Delay
Forms Mode 3-4 (FW2 only) 3-12
Unprotected Data Field Lower Case Lockout
(Left-Justified)
3-5
(PW2 only) 3-12
Right-Justified Field 3-5 Programmatic Mode Control 3-13
Transmittable Protected Data 4 KEYBOARDS
4-1
Field 3-6 General Description
4-1
Field Overflow Inhibit 3-6 Keyboard Configurations
4-1
Tab Field Identifier 3-6 U.S. Typewriter Keyboard
4-1
Tabulation 3-6 Data Preparation Keyboard
4-1
Fixed 3-6 Programmability/Expanded
Variable 3-6 Alphanumeric Keyboard 4-1
Reverse Tabulation 3-7 lO-Key Auxiliary Keyboard 4-2
Tab Field Identifier 3-7 No Keyboard (Receive-Only
Screen Operations 3-7 Terminal) 4-2
Programmable Cursor Position 3-7 Control Keys 4-2
Pages Roll Up/Down 3-7 XMT -Transmit Key 4-2
Display Scroll Up/Down 3-7 RCV -Receive Key 4-3
Variable End-of-Page Alarm 3-7 LOCAL Key 4-3
Page Wrap-Around Inhibit 3-8 SPCFY -Specify Key 4-3
Edit Functions 3-8 CTRL -Control
KlW
4-4
Character Insert by Line or Page 3-8 Indicators 4-4
iii

TABLE OF CONTENTS (CONT.)
Section Title Page Section Title Page
XMT -Transmit Mode Indicator
44
MCR Code Translation 5-2
RCV -Receive Mode Indicator 44
6 AUXILIARY PRINTERS
6-1
LOCAL -Local Mode Indicator
44
General Description 6-1
FORMS -Forms Mode Indicator 44
Print Commands 6-1
CTRL -Control Mode Indicator
44
A9249 Line Printer 6-2
ENQ -Enquiry Indicator
44
Shared Operation 6-2
ERROR Indicator 44
Data Message 6-3
LTAI -Line Terminal Activity TC4001 Serial Printer 6-3
Indicator
44
Configuration 6-3
Function Keys (Keyboard Control Messages (Forms
Symbol) A
c:
Compose Option)
64
'T-"}
Automatic Key Repeat 4-5 Data Messages
64
Line Feed ( t ) 4-5 B9354-6 Printer 6-6
Reverse Line Feed ( • ) 4-5 TTY Printer CR Delay 6-6
Backspace
(~ ) 4-5 7 MAGNETIC TAPE CASSETTE
7-1
Forward Space (-.. ) 4-5 General Description
7-1
CLEAR/HOME 4-5 Operational Considerations
7-1
Return (RET) 4-5 Modes
of Operation 7-3
SKIP/TAB 4-5 Commands 7-3
Reverse Tabulation (RTAB) 4-6 Write Modes 7-3
End-of-Line/End-of-Page Clear Write Data
to Tape
7-3
(EOL/EOP CLR) 4-6 Write Unprotected Data
to
Line Insert/Delete (LINE Tape 7-4
INS/DEL) 4-6 Write Tape Mark
74
End-of-Text/Group Separator Read Modes 7-5
(ETX/GS
1\)
4-6 Read Block from Tape 7-5
Leading Forms Delimiter Key 4-6 Read Page from Tape 7-6
Trailing Forms Delimiter Key 4-6 Read Page and Transmit 7-6
Character Insert (CHAR INS) 4-6 Read File and Transmit 7-6
Character Delete (CHAR DEL) 4-7 Rewind 7-6
Keyboard Security Lock 4-7 Backspace 7-6
Alphanumeric Typewriter 4-7 Selected File Search 7-6
13-Key Numeric Keypad Section 4-7 General Operation 7-7
Keyboard Function Keys 4-8 End-of-Tape (EOT) 7-7
LED Indicators 4-8 Updating 7-7
Automatic Key Repeat Function 4-8 Error Detection 7-7
Security Lock 4-8 Operator Alerts 7-7
Key Programmability 4-8 A SYSTEM REGISTER AND
Key Programming from Keyboard 4-12 CONFIGURATION OPTIONS A-I
Example 1 4-12 Bit Format and Values A·1
Example 2 4-12 Measurement Information A-I
Example 3 4-17 Message Registers A-18
Example 4 4-17 Reading from Central System A-19
Key Programming from Data CTRL H Sequence A-20
Comm 4-17 Key Program Address A-21
Programming Limitations and Firmware Level Identification A-21
Notes 4-21 Start-of-Transmission Point
EAROM Configuration 4-21 (Mobil Home)
A-21
5 MAGNETIC CARD READER
5-1
Line-at-a-Time Transmission A-22
General Description
5-1
XMT Page in Forms Mode A-22
MCR Function
5-1
Lower Case Lockout A·23
MCR Operations
S::-1
Disable Buzzer A-23
ABA Magnetic Stripe Data Format 5-2 Special Messages
to Status Line A·23
iv

TABLE OF CONTENTS (CONT.)
Section Title Page Section Title Page
B TD 830/TD 730 CHARACTER- F SYSTEM CONFIDENCE TESTS
F-l
ISTICS SUMMARY
B-1
General F-l
TD 730 Characteristics
B-1
Confidence Tests and Error Codes F-2
TO
830 Characteristics
B-1
C CHARACTER VARIATIONS
C-1
G TERMINAL CONFIGURATION
D LOCAL KEYBOARD CONTROL D-l REQUEST FORM G-l
E PROGRAM CONTROL (DATA
COMM)
E-1
H TD 700 LOOK-ALIKE H-l
LIST OF ILLUSTRATIONS
Figure Title Page Figure Title Page
1-1
TD 730 Series
1-1
4-13 Version 7 Keyboard 4-11
1-2 TD
830 Series 1-2 4-14 Version 8 Keyboard 4-11
1-3
TD 830/TD 730 Basic System 4-15 Version 9 Keyboard 4-11
Configurations 1-2 4-16 Version 10 Keyboard 4-12
14
TD 830/TD 730 Peripheral- 4-17 KA
WASE Keyboard 4-12
Capable System Configurations 1-2 4-18 Example
of ESC RK Sequence 4-20
2-1 Simplified Remote Input/Local 4-19 Example
of ESC RK Program
Output Flow
2-1
Sequence 4-21
2-2 Simplified Local
Input/Remote
5-1 TD/MCR Configuration 5-1
Output Flow 2-2 5-2 ABA Magnetic Stripe Data
Format
5-2
3-1 Status Line Format 3-1
6-1
TD/A249 Configurations 6-2
3-2 Error Log Format 3-2 6-2 TD/TC 4001 Configurations
64
3-3 Scroll Up/Down 3-4 6-3 TD/B9354-6 Printer Configuration 6-6
4-1 U.S. Typewriter Keyboard,
7-1
Single TD/Cassette Controller
ASCII 4-1 Configuration
7-1
4-2 Data Preparation Keyboard 4-2 7-2 Two TD/Cassette Controller
4-3 10-Key Auxiliary Keyboard 4-3 Configuration 7-2
44 TO 019 Keyboard, U.S. (Version 1) 4-7
7-3
Four TD/Cassette Controller
4-5 International Character Modifica. Configuration 7-2
tions
to ASCII Code Chart 4-8 7-4 Cassette Tape Formats 7-3
4-6 Japanese (KAWASE) Character 7-5 Write Flow 7-5
Set 4-9 7-6 Read Flow 7-6
4-7 Version 1 Keyboard 4-9 C-l TD 830/TD
730 U.S. ASCII
4-8 Version 2 Keyboard 4-10 Chart
C-1
4-9 Version 3 Keyboard 4-10
C-2
Modified U.S. ASCII Chart
C-2
4-10 Version 4 Keyboard 4-10
C-3
International Character Sets
C-2
4-11 Version 5 Keyboard 4-10
C4
Standard ASCII Character
4-12 Version 6 Keyboard 4-11 Generator
C-3
v

LIST OF TABLES
Table Title Page Table Title Page
2-1
TD Data Comm Configurations 2-3
6-5 TC4001 Positional/Format
2-2 TD 830/TD 730 Simplified Control Characters 6-6
Memory Layout
2-5
7-1 Cassette Control Codes 74
A-I Bit Format and Value A-I
3-1 Status Line -Error Messages
3-1
A-2
Display Memory Characters and
3-2 Page/Screen/Display Memory Page Combinations 1\-2
Relationship 3-3
A-3 Position End-of-Page Alarm
A-3
4-1
Programmable Keys on TD015, A4 Terminal Configuration Firmware 1
A4
TD016, and TD018 Keyboards A-5 Terminal Configuration Firmware 2
A-8
(Firmware 3.0 or Higher) 4-2 A-6 Terminal Configuration Firmware 3A-12
4-2 Programmable Keys on TD019
A-7
Transmit-to-Receive Delay A-IS
Keyboard (Firmware 3.0 or
A-8 Baud Time Delay A-16
Higher) 4-3
A-9
Baud Rate Conversion A-16
4-3 Keyboard Control Keys 4-13 A-10 Clear-to-Send Delay A-16
44 LED Indicator Functions 4-18
A-ll Transmit-to-Receive and Baud-
4-5 Hexadecimal Codes for Program- Time Delays A-17
mabIe Keys 4-22 A-12 Memory Assignment and Address A-I7
5-1
MCR Character Conversion 5-2 A-13 Decimal
to HEX Code
5-2 Sample Stripe
Data
5-2 Conversion A-I8
6-1
Print Commands 6-1
A-14 CTRL H Sequence Code
6-2 ODEC Control Through Char- Chart A-19
acter Translations 6-2 A-IS Firmware Level Identification A-21
6-3 TC4001 Control Codes 6-5
E-1
Programmable Cursor and
64 TC4001 Print Functions 6-5
Select Page Control E-2
vi

INTRODUCTION
This manual describes Burroughs TD 830 and
TD 730 series of input, output, and display systems,
including the system operations and capabilities. In
this manual, "enabled by Burroughs"
or "in~talled
by Burroughs" mean that Burroughs field engmeers
perform the functions described.
This manual is written for the user. The user
is
considered to be a purchaser, a programmer, or an
operator. It is recommended that the operator has ei-
ther typing
or keypunch experience. For the pro-
grammer, data comm experience is helpful.
This manual is organized as follows:
Section Title
1 Gene~ Description
2 System Characteristics
3 System Concepts
4 Keyboards
5 Magnetic Card Reader
Section
6
7
Title
Auxiliary Printers
Magnetic Tape Cassette
Appendices
Further information is available in the following
manuals:
Form
Number
1097805
1094901
1086956
1094117
1092632
Title
TD Series Burroughs Data Comm Line Control
Procedure Reference Manual
Binary Synchronous Multipoint IBM
3270 Line
Control Procedure for TD
820ITD 800/TD 700
Reference Manual
Burroughs Basic Data Communications Line
Control Procedures Reference Manual
Magnetic Card Reader Operator Manual
Personal Identification Number (PIN) Keyboard
Operator Manual
vii

SECTION 1
GENERAL DESCRIPTION
GENERAL
The TD 830rrD 730 terminals are input, output,
and display systems. Input and output may be re-
mote and/or local.
Display requirements are different for the two
TDs. The
TD 730 (figure 1-1) has a SELF-SCAN ®
II screen. The TD
830 (figure 1-2) has a cathode ray
tube (CRT) screen.
Remote data is 'sent to/from a central system via
a data comm line. Local input may be from the key-
board, the magnetic card reader, and/or the magnetic
tape cassette. Local output may be to the screen,
the auxiliary printer, and/or the magnetic tape cas-
sette. The input/output is alphanumeric data and/or
special control characters. .
SYSTEM CONFIGURATIONS
Odd numbered units are basic systems (figure 1-3);
even numbered styles are peripheral-capable (figure
1-4).
Both basic systems and peripheral-capable sys-
tems are further divided by the data comm modes:
Burroughs Asynchronous (TD 832rrD 831rrD 732/
TD 731); Burroughs synchronous (TD 834rrD 833/
TD 734/TD 733); and IBM 3270 binary synchronous
(TD 838rrD 837rrD 738/TD 737).
)
Figure 1-1. TD 730 Series
® Registered Burroughs trademark.
1-1

Figure 1-2. TO 830 Series
BURROUGHS
ASYNCHRONOUS
DATA COMM
TO 731 I TO 831
BURROUGHS
SYNCHRONOUS
DATA COMM
TO 733 / TD 833
IBM 3270
BISYNCHRONOUS
DATA COMM
TO 737 / TD 837
EP1543
1- 2
Figure 1-3. TO 830/ TO 730 Basic System
Configurations
EP1 544
BURROUGHS
ASYNCHRONOUS
OATA COMM
BURROUGHS
SYNC HRONOUS
DATA COMM
I BM 3270
BISYNCHRONOUS
DATA COMM
Figure 1-4. TD 830/ TD 730 Peripheral-Capable
System Configurations

SECTION 2
SYSTEM CHARACTERISTICS
GENERAL DESCRIPTION REMOTE
1/0
The system characteristics include the remote
input/output, local input/output, processing charac-
teristics, and system confidence tests. This section
describes the system data flow to and from the cen-
tral system and peripherals (figures 2-1 and 2-2).
The system can communicate with the data comm
systems. Data comm capability is further described
in the TD Series Burroughs Data Comm Line Con-
trol Procedure Reference Manual. Data comm capa-
bility includes either Burroughs asynchronous
~
CENTRAL
SYSTEM
(REMOTE)
EP1545
TO MEMORY
1r--1. -TEMPOR-A"Y l
SYSTEM
REGISTERS
r---l
STATUS LINE ~-+---------~
DATA
COMM
BUFFER
DISPLAY
MEMORY
CASSETTE
CONTROLLER
Figure 2-1. Simplified Remote InputJLocal Output Flow
AUX PRINTER
2-1

MCR
~ CASSETTE
~RIVE- -r;-- CONTROLLER DISPLAY
MEMORY
STATUS
LINE
TO MEMORY
.
/
rr--~'- ~
TEMPORARY
'---t--.~ SYSTEM 14--+---+---1
DATA
COMM
BUFFER
REGISTERS '-------'
,
I
CENTRAL
SYSTEM
(REMOTE)
L_~ ___ ' DISPLAY
EP1546
,Figure 2·2. Simplified Local InputIRemote Output Flow
(TO 832/TO 8311TO 732/TO 731); Burroughs syn-
chronous (TO
834ITO 833ITO 734ITD 733), or IBM
3270 binary synchronous (TO 838/TO 837ITO 738/
TO 737) mode of transmission (table 2-1). With
Burroughs asynchronous mode, the data comm line
may be TOI (two-wire direct-connect interface); BOI
(Burroughs direct-connect interface); or via data
sets. Burroughs synchronous and IBM
3270 binary
synchronous modes utilize data sets. The line disci-
plines for the TO data comm configurations available
to- the user are listed in table 2-1.
LOCAL INPUT
The local input may be from the keyboard, the
magnetic card reader, and the magnetic tape cas-
2-2.
sette. Except for the keyboard, all local input peri-
pherals require the peripheral interface (peripheral-
capable systems). Up to two peripheral commands
may be stored in each peripheral-capable system.
Each peripheral operates independently
of any other
within each peripheral-capable system.
Keyboard
Several keyboards are available for each system.
The keyboard keys function as local input to TO
memory. Keyboards are described in more detail in
Section 4.
Magnetic Card Reader
The magnetic card reader (MeR) reads magnetic

Table 2-1. TD Data Comm Configurations
,r
Data Sets
"""
Multiple
Direct-Connect
Terminals
Single
Line Disciplines
BDI
TDI (Concatenation)
Terminal
Burroughs Asynchronous
TD 731/TD 732/TD
831/TD832
Multipoint Procedure
Poll X X X X
Select X X X X
Fast Select X X X X
Contention X X X X
Broadcast Select X X X X
Group Select X X X X
Group Poll (with Concatenation) X X X X
Point-to-Point Procedure
Switched (Non-Batch) X
Leased (Contention) X X X
Opera lOr Display Terminal
(ODT) B 9348-30
B
6700 ODT Point-to-Point Procedure
X*
Burroughs Synchronous
TD
733/TD 734/TD 833/TD 834
Multipoint Procedure
Poll X X
Select X X
Fast Select X X
Contention X X
Broadcast Select X X
Group Select X X
Group Poll X X
Point-to-Point Procedure
Switched (Non-Batch) X
Leased (Contention) X
IBM Binary Synchronous
TD
737/TD 738/TD 837/TD 838
3270 Procedure
General Poll X X
Specific Poll X X
Select X X
~ B 6700/B 1700 6-wire ODT cable with TD 830 using RS232C asynchronous interface_
~
stripes on credit cards that conform to ABA (Track
II) standards. The magnetic card reader may be at-
tached to peripheral-capable systems. The magnetic
card reader is described in Section
5.
Magnetic Tape Cassette
The magnetic tape cassette attaches to peripheral-
capable systems. Data transfers from a cassette
2-3

drive via a cassette controller to the display termi-
nal. The configurations and cassette operation are
described in Section
7.
LOCAL OUTPUT
The local output available on these systems is to
the screen, auxiliary printer, or magnetic tape cas-
sette. Every system has screen capability. However,
peripheral-capable systems may also interface the
auxiliary printer and the magnetic tape cassette.
Screen
Each terminal in the series has a local output to
the screen. The screen acts as a window to the dis-
play memory. The TD 730 utilizes a 480-character
SELF-SCAN II display panel, which displays up to
12 lines of 40 characters each. Data field configura-
tion is set during system initialization and may be
changed temporarily through central system program
control. Two basic screen display configurations are
available:
12 lines of 40 characters per line, and 8
lines
of 32 characters per line. The basic configura-
tions are further alterable through use
of the variable
page length function.
The TD
830 displays 2,000 characters, consisting
of 1,920 characters of data and 80 characters of sys-
tem information (status line). Data field configuration
is set during system initialization and may be
changed through central system program control.
Four basic screen display configurations are avail-
able:
12 lines of 40 or 80 characters per line, and 24
lines of 40 or 80 characters per line. The four basic
configurations are further alterable through use
of
the variable page length function.
Auxiliary Printer
Local hard-copy output is available in the periph-
eral-capable
systems. Three Burroughs auxiliary
printers are available: A9249, TC4001, and B9354-6.
Only one auxiliary printer may be configured by
Burroughs with each system. Auxiliary printers are
described in Section
6.
Magnetic Tape Cassette
The peripheral-capable systems have the optional
capability
of writing to cassettes. Cassette operations
are described in Section
7.
PROCESSING CHARACTERISTICS
The processing of the terminal is performed by the
microprocessor, firmware, character generator, and
memory.
2-4
Microprocessor, Firmware, and
Character Generator
The terminal contains a microprocessor with ac-
cess to all terminal memory. The microprocessor in-
terprets instructions contained within the firmware
memory. The microprocessor and firmware control
the features
of the terminal internally.
NOTE
References to firmware within this
manual refer to all firmware levels un-
less otherwise identified.
The character generator can generate 128 charac-
ter symbols (Appendix C). Ninety-six characters
may be called out from the U.S. Typewriter ASCII
keyboard.
Memory
Memory layout is provided in a simplified form in
table 2-2. Memory is laid out in terms
of accessibil-
ity by firmware, Burroughs, and the user program.
Firmware Memory
Firmware memory is a set of operating instruction
sequences. These instruction sequences control sys-
tem functions (system firmware) and peripherals (de-
vice firmware). Device firmware is provided with pe-
ripheral-capable systems. The instruction sequences
control edit functions, confidence tests, interrupt
procedures, initialization procedures, and peripheral
control. Firmware memory is internal to the terminal
and is protected from being altered either by
Burroughs or by the user.
User Program Memory
This memory is of primary concern to the user. It
is subdivided into data comm buffer, display
memory, magnetic card reader buffer, status line,
and temporary registers.
The data comm buffer transfers data to and from
the central system. Buffer size is 1,200 characters in
the basic system and 3,000 characters with the ex-
panded memory option. A 1,920-character page re-
quires the expanded memory option.
The display memory contents may be viewed on
the screen by accessing a selected portion
of display
memory, (as described in Section 3). Data goes from
the display memory to the central system and is re-
ceived in display memory from the central system

Table 2·2. TD 830/TD 730 SbnpUfted Memory Layout
MEMORY ITEM
ACCESSIBLE: BY
DATA
COMM BurrER
01 SPL AY MEMORY
USER PROGRAM
MAGNETIC CARD READER
BurrER (CENTRAL SYSTEM)
:
STATUS LINE BurrER
TEMPORARY SYSTEM
REGISTERS
SCRI.TCHPAO. ETC.
BURR OU GHS
PERMA'4ENT SYSTEM
REGISTERS
SYSTEM rIRMWARE
rIRMWARE
DEVICE f"IRMWARE
(PERIPHERAL CAPABLE SYSTEMS)
via the data comm buffer. The display memory size
is
1,920 characters in the basic system and 4,000
characters with expanded memory.
The magnetic card reader buffer size
is 40 charac-
ters. The
MCR data is stored in the buffer before
transmission to the central system.
Central system messages may be sent to the
80-
character status line buffer. In the TD 830, the mes-
sage
is immediately displayed on the screen status
line. To view the central system message on the
TD
730, the status line has to be called out.
The user may temporarily change the system reg-
isters (Appendix
A). The program may call out
(read) a temporary system register and change the
system register temporarily for a particular applica-
tion. The system returns to its permanent system
registers when a system confidence test is performed
or when the terminal is powered-down.
2-5

SECTION 3
SYSTEM
CONCEPTS
GENERAL DESCRIPTION
This section describes the concepts that are specif-
ic to the basic system. They include system regis-
ters, status line, page, format, editing functions,
data
highlighting, and special data comm features.
SYSTEM REGISTERS
The configuration of the system is defined by 32
bytes of the system register which are set up in the
factory and may only be modified
by Burroughs.
The system register contents are permanently stored
(refer to Appendix A for options). System register
bytes may be altered temporarily- by the central sys-
tem program. On power-down
of the terminal, the
temporarily altered bytes are erased. On the next
power-up, permanent
data is rewritten into memory
to configure the system.
The
ESC, RH, aaaa, 01, HH ESC RC sequence
allows temporary change
of one byte at address
aaaa, and
HH the hexadecimal value. For example,
ESC RH 0084 01 03 ESC RC temporarily sets the
number
of lines per page to four.
STATUS LINE
Status line data is stored in 80 characters of dis-
play memory, which is only indirectly accessible. the
status line is displayed constantly
on the TD 830 in
the 25th display line,
but must be called on the
TD 730 by pressing the CTRL key twice. The
TD 730 only allows the first 64 characters access to
the status line
if it has the 8-by-32 screen format
(TD 700 look-alike mode).
The
TD 730 status line disappears on the subse-
quent activation of any keyboard. The TO 730 status
line occupies the last two lines
of the display in
place
of the data normally on those lines. Data nor-
mally displayed is stored in the display memory
and
reappears when any keyboard key is activated. The
status line
format (figure 3-1) includes the error con-
ditions, special messages, and the page number. The
status line display is independent
of system register
options.
16
ERROR CONDITIONS
TD730
ERROR C~~DITIONS I
TD830
57
SPECIAL MESSAGES
24
SPECIAL-
33
MESSAGES
I PAGE :UMBER
EP1548
Figure 3-1. Status Line Format
Error Conditions
7
PAGE NUMBER
The terminal displays error messages in the first
16 character-positions of the status line. The termi-
nal contains five
error messages which may be per-
sonalized
by Burroughs as explained in table 3-1. Er-
ror messages are cleared by pressing the LOCAL
key.
Error Log
The terminal records up to 15 errors for data
comm, cassette, A9249 printer, magnetic card read-
er, and
power supply. To retrieve the errors (error
log), the central system program sends out the re-
trieve command (implemented in firmware 2):
ESC RL
Table 3-1. Status Line - Error Messages
Error Message Error Condition
DATA COMM ERROR Block check or data comm hardware error
KEYBD DATA LOST Keyboard buffer overflow
PRINTER ERROR Printer hardware error
Power off or faulty cable connection
CASSETTE ERROR Cassette read or write error
Impomp1ete tape command or CRC error
POWER FAULT Momentary power loss
3-1

The terminal leaves receive mode and enters
transmit mode with the error log information ready
for transmission. When polled, the terminal trans-
mits the message identified in figure 3-2. Locally, the
error log may be retrieved
by the following se-
quences:
CTRL RWMODE
CTRL RLXXXX
Locally, the display result is:
IDC 00 Dl 00 D2 00 D3 00 IE 00
Each error hexadecimal digit shown may vary
from 0 to
F, indicating from 0 to 15 errors. If the er-
rors exceed 15, the error count still remains at 15.
The error log is cleared when the terminal is pow-
ered-on (by CTRL space, D, CTRL or ESC, space,
D).
For example, if the central system program sends:
ESC RL
The terminal might respond with the following 10
hexadecimal digits:
OOOB040000
indicating that 11 cassette errors and four printer er-
rors have occurred.
SPECIAL MESSAGES
The special message section of the status line is
used to display data comm entered data that cannot
be altered by the operator. Special messages
of up
to
57 characters (FWl), or up to 72 characters
(FW2), may be displayed without overwriting other
data displayed in the status line. Typical special
messages may include computer
or system status
and operator notification
of data entry on non-dis-
played pages.
+~~+--r+ ----cl.,..--'l--IGNORE
o vow 0 x 0 Y 0 Z
~''''.M """ J J J
CASSETTE ERRORS
PRINTER ERRORS
MAGNETIC CARD READER
ERRORS------J
POWER FAULT ERROR ------.,-----'
EP1549
Figure 3-2. Error Log Format
3-2
The fast select, group select, and broadcast select
procedures are used in conjunction with the ESC,
RA sequence (FWI or FW2) to write special mes-
sages of. up to 57 characters.
Program control
of the status line special message
has the following format:
ESC RA031039 (message up to 57 characters)
For example, the message OPERATOR ALERT
appears as follows:
ESC RA0310390PERATOR ALERT
Sending a message to the status line automatically
erases the previous message in firmware
1.
Fast select, group select, and broadcast select pro-
cedures are used in conjunction with the ESC, RS
sequences for special messages of up to 72 charac-
ters (FW2 only). Program control
of the status line
special message has the following format:
ESC RSHH (message up to 72 characters)
where
HH is the message length in hexadecimal.
For example, the message OPERATOR ALERT
appears as follows:
ESC RSOE OPERATOR ALERT
Pressing the LOCAL key clears the status line,
except PAGE and the page number. Sending the
ESC RSOOO sequence also clears the status line (ex-
cluding page and page number).
Page Number
The word PAGE and the number of the page on
which the cursor is located are displayed
automatically in the last seven positions of the statUlt
line.
In terminals configured for single page operation,
the customer may elect not to display the word
PAGE or the page number, by having Burroughs dis-
able this option.
Page
During mUltiple page operation, this system is able
to separate the data communications pointer from
the display cursor, thereby allowing keyboard data
to be entered on one page and external data (data
comm
or peripheral) to be entered on, or transmitted

from, another. This capability greatly increases effi-
ciency: it is no longer necessary for the operator to
wait for the display to be serviced by the central
system. After the XMT key is pressed, the operator
may immediately advance to the next page and start
entering data.
Data verification messages may also be trans-
mitted back while the operator is entering new infor-
mation. For example, data is entered on page 1 and
transmitted. The operator advances to page 2 and
enters data. When the central system completes pro-
cessing the page 1 information, it responds to page
1 without interrupting local operation on page
2.
When the pa~e 2 entry is complete, page 1 and page
2 reverse roles. Thus the operator is able to enter
data continually without having to wait for the cen-
tral system.
Where selective print
of messages is required, the
operator can initiate a print function and proceed to
enter data on the next page while the system is
printing the previous page on an auxiliary printer.
This allows the user to divide the terminal display
memory into one or more pages. The user selects
the page size via program control. Each page con-
sists of a minimum of four lines of display memory
and may be extended up to the limits
of the display
memory in four-line increments (table 3-2).
Table 3-2. Page/Screen/Display Memory Relationship
Page*
Lines per
Page
8
32
4
8
12
24
4
8
12
24
4
8
12
16
20
24
48
72
4
8
12
16
20
24
36
*NOTE:
Display Memory
Screen Basic (1920)* EXDanded (4000)*
Lines per Char. Pages Usable Usable
Screen per line Displayed Pages Char. Pages Char.
8
32
1 7 1792
N/A
N/A
8
32
1/4 1 1024
N/A N/A
12 40
3 12
1920 25 4000
12
40
1-1/2 6 1920 12 3840
12 40
1 4 1920 8
3840
12 40
1/2 2 1920 4 3840
12
80 3 6
1920
12
3840
12
80
1-1/2 3 1920
6
3840
12
80 1 2
1920 4 3840
12
80
1/2 N/A N/A
2
3840
24 40
6 12
1920 25 4000
24 40
3 6
1920 12 3840
24 40 2 4 1920 8
3840
24
40
1-1/2 3 1920 6 3840
24 40
1-1/4 2 1600
5 4000
24
40 1 2 1920 4 3840
24
40
1/2
N/A N/A 2 3840
24
40
1/3 N/A N/A 1 2880
24
80
6 6 1920 12 3840
24 80 3 3
1920
6
3840
24
80 2 2
1920 4 3840
24 80
1-1/2 N/A N/A 3 3840
24
80
1-1/4 N/A N/A 2 3200
24 80
1
N/A N/A 2
3840
24
80 2/3 N/A N/A 1 ?RRO
Page size cannot exceed data comm buffer size. The Basic and Expanded memory data comm
buffers are 1200 and 3000 characters, respectively.
3-3

The system performs most edit and format func-
tions on a page basis. The scroll and tabulation func-
tions are on a system basis. Data highlighting oper-
ates on a line basis. This allows varied data
configurations on different pages.
Page Boundary Crossing
The page boundary may be crossed either by the
display cursor or the data comm pointer. The display
cursor is moved across the page boundary by five
functions: page advance, page back, scroll up, scroll
down, and cursor alignment. The data comm pointer
is
moved by three functions: select page and
pressing the XMT or the ReV key. Tab stops are on
a system basis. The functions are explained as
fol-
lows:
Function
Page
advance
Page back
Explanation
Enabled through keyboard (CTRL --+) and
advances the display cursor to the home
position
of the next page.
Enabled through keyboard control (CTRL
+-)
and moves the display cursor to home on the
preceding page.
Scroll up Allows the operator
to scan downward toward
the end
of the display memory. Data appears
to move upward
on the screen (figure 3-3).
When the cursor is
on the last line of a page,
scroll up causes the cursor to appear
at the
same location in the first line
of the next
page. CTRL t controls this function.
Scroll down Allows the operator to
scan upward toward the
beginning
of the display memory. The data
appears to move downward on the screen
(figure 3-3).
Cursor
alignment
Select page
XMT key or
RCV key
When the cursor is in
the. flfst line of a page,
the scroll down function causes the cursor to
appear
at the same location in the last line of
the preceding page. CTRL ! controls this
function.
Enabled through keyboard control (CTRL »
or program control (ESC &) and moves the
display cursor to the location and page
on
which the data comm pointer is positioned.
Enabled through program control (ESC &
Page), Appendix E, causes the data comm
pointer to move to the home position
of the
selected page.
Examples:
ESC & ! homes the cursor on page 2.
ESC & space homes the cursor on page
1.
ESC & & homes the cursor on page 5.
Pressing either the XMT key or the RCV key
aligns the
data comm pointer with the display
cursor.
During mUltiple page operation, the terminal may
separate the data comm pointer from the display cur-
sor. This allows keyboard data to be entered on one
page and external data (central system data or pe-
ripheral data) to be entered on another.
3-4
tSCROLL UP
;,,/-1 POSIJ
1tI:J)M)( :1.-1·
FP.0(1PI.li
l3i);.. iXIT"..
2rXT{C; i);:;
DISPLAY
__ MEMORY
}\!l'. ~_~c i\!P
XFr,Clllfi 'FA 11
l3Rr,~np ~Ii
NtiXZI-1>Jw
, DR.7.WIi!<ST
"l1'i \,'\: :n':M
L:-;Ol.iRNZ-
;::Lv..C,OM
£XnRI UX
FIt: ;"",5 L~":
Z.~!'!trH'O
f.'~.\'/"\M'
":~.~ t:'i/ ... 11~
SCREEN
r--DISPLAY
+ SCROLL DOWN
Figure 3·3. Scroll Up/Down
Format and edit functions that are data comm
initiated affect data on the data comm pointer page
only. Format and edit functions that are keyboard
entered affect data on the display cursor page only.
Data from the data comm pointer page is transmitted
through the use
of the proper keyboard or program
control (Appendices D and E respectively).
FORMAT FUNCTIONS
The system may display data in various formats,
which are controllable by either the central system
program or the keyboard operator. The format func-
tions described are forms mode, tabulation, and
screen operations. These functions are on a page
basis except for the scroll and tabulation operations.
Forms Mode
Forms mode is used to send page information
from the central system to assist the operator to in-
put data in the proper format. In forms mode, data
is divided into unprotected and protected fields. The
unprotected data may either by left-justified (normal
unprotected data field)
or right-justified (numeric
fields). The protected data fields may either be trans-
mittable or not transmittable. The field overflow in-
hibit and the tab field identifier features may be en-
abled by Burroughs to be used in forms mode.