Beehive International DM3270 User manual

C> Beehive In~. 19111 - All IUF&s llaelWd
DM3270'
DM3270
DM3270
DM3270
DM3270
DM3270
DM3270
DM3270
DM3270·
DM3270
DM3270
DM3270
DM3270
DM3270
DM3270
TECHNICAL USER MANUAL
Control Unit Display Station
BEEHIVE INTERNATIONAL

TM11-3270-1(Rev.1/82)
MODEL
DM3270
••enhanced
emulation''
IBM 3276-2 type
stand,;,alone
control unit
display station
1.
TECHNICAL
USER MANUAL
January 1982
This document has been prepared by Beehive International and isfurnished on
the condilKJn that ii will be used by the customer solely for the purpose of
supporting the operation. service and maintenance of Beehive products. Bee-
hive believes that the information described in this manual is accurate and
reliable, and much care has been taken in its preparation. However, no responsi-
bility,
financial or otherwise, 1s accepted for any consequences arisingout 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 addjlions. The rights
of the customer with respect to this document will be governed by mutually
acceptable provisions of the contract with Beehive lntemational. This document
shall not be duplicated by the customer, nor released. disclosed or used. in
whole or m part. for any purpose other than stated herein. without the express
written perm1ss10n of said Beehive International.
Anothet T ermmal tr om
BEEHIVE INTERNATIONAL
Manufacturer of Qua/lly Computer Systems
4910 Amelia Eerhart Drive •Box 25666 •Salt Lake City, Utah 94125 •Phone C6011 35!5-6000 •TWX 910-92!5-!5271

WARNING: This equipment generate1,
UMS, and can radiate radio frequency en·
ergy end if not inatslled and used in accOfd.
snce with the instructions manual. may
csuM interference to radio communica-
tions. As temporarily permitted by regula-
tion it hu not been tested for complisnce
with the limfts for CIUS A computing de-
vicespursusnt lo Subp9rtJ of Pert 15 of FCC
Rules, which are dHigned pro'lide r•aSC>r?-
sble prolection sgainst such interterenc:e.
Operstion of this equipment in • residential
SJe• is likely to csuse in~ in which
case the UHi' st his own expenH will be
required to lske whatever messures msy be
required to correct the interference.

SECTION
1.1
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
3.1
3.2
3.3
3.4
3.5
2.5.1
2.5.2
2.5.3
2.5.4
2.7.1
2.7.2
2.7.3
2.7.4
2.7.5
2.7.6
2.7.7
2.7.8
3.1.1
3.1.2
3.1.3
3.1.4
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
TABLE OF CONTENTS
SECTION I- SPECIFICATIONS
TITLE PAGE
INTRODUCTION
1-1
SECTION II -INSTALLATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
INSPECTION FOR IN-St-ilPMENTDAMAGE . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Placement for Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . · 2-1
AC PowerConnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Data Interface Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
PC Board-Mounted Control Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
INITIALTURN-ON PROCEDURE . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
REAR PANEL SWITCH USE . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
LCl-LowerCase InhibitS 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Setting UpContention Protocol (Point-to-Point) . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Optional Beehive Printer(P1600) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
PrinterAddress (S1-2, S1-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
OM3270Control Unit Address (S1-4, 51-5, S1-6, 51-7, S1-8) . . . . . . . . . . . 2-6
PrinterFlowControl (S2-1, S2-2, 52-3) ..................... .'. . . . . . . . . 2-6
PrinterSpeed (S2-4, S2-5, S2-6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Printer Parity (S2-7, S2-8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
INTERNALSWITCH USE (S3-1, 53-2, S3·3) . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
SECTION Ill -OPERATION
BASIC OPERATION ............................................... .
Operating Environment
............................................ .
Turn-On Procedure
................................................ .
Rear Panel Switches
.............................................. .
Audible Alarm ..................................................... .
DISPLAY OPERATION ............................................ .
Display Format and Character Set ................................... .
CursorOperation
.................................................. .
Display Fields ..................................................... .
Field Attributes .................................................... .
Status Line ....................................................... .
Lower Case Inhibit (LCI)
............................................ .
KEYBOARD OPERATION
......................................... .
Keyboard Modes
.................................................. .
Typamatic Operation
.............................................. .
Keyboard Disable (Input Inhibit)
..................................... .
Alphameric Data Entry ............................................. .
Automatic Skip
.................................................... .
PAINTER OPERATION ............................................ .
SELF-CONFIDENCETEST ........................................ .
3-1
3-1
3-1
3-2
3-2
3-2
3-2
3-2
3-2
3-2
3-3
3-3
3-3
3-4
3-4
3-4
3-4
3-5
3-5
3-6

TAllLE
1-1
2·1
2·2
2·3
2-4
3-1
3-2
1-1
1·2
2·1
2·2
2·3
3·1
3-2
Table of Contents
(continued)
UST OF TABLES
DESCAIPTION
DM3270Specifications ............................................ .
AC Power and Ground Connectors ...... , ........................... .
PrinterPort Pin Assignments ........................................ .
Contention Protocol (Point-to-Point) ..........••...•..•....•.........
Control UnitAddressChatt ...•..•........•..........•....••.•..•...
EBCDIC to ASCII Conversion Table ................................ .
Self Confidence Test ErrorDescriptions ............................. .
LIST OF ILLUSTRATIONS
.DESCRIPTION
DM3270Keyboard Layout .......................................... .
OM3270Tenninal ................................................. .
Mounting Requirements
............................................ .
AC Powerand Ground Connectors .................................. .
lntemaland Extemal Switches With Communications Hookup ........... .
Status Line Messages and Field Descriptions ......................... .
Keyboard Layout and
Key Description ................................ .
ii
PAGE
1-2
2-2
2-2
2-3
2-4
3-5
3-6
PAGE
1-1
1-2
2-1
2-2
2-5
3-3
1of2/
2of2

SECTION I
SPECIFICATIONS
1.1 INTRODUCTION
This manual contains setup and operating instructions for
the DM3270 terminal. The DM3270 Control Unit Display
Station is a 8085A microprocessor-controlled emulator of
the IBM 3276* Model 2 Control Unit Display Station. The
DM3270 provides the major functional capabilities of the
original IBM component. This manual is divided into three
sections:
Section I - provides a specification sheet and introduc-
tion forgeneralterminal information.
Section II -describestheinstallation, interface, and initial
checkout of the terminal.
Section Ill -describes to the operator the operational
characteristics and functions ofthe terminal.
The screen display is organized with 24 lines of 80 char-
acters each (1920 characters). The standard set of 3279
*May be a registered trademark of IBM
field and visual attributes is provided as well as Extended
Highlighting Features found
in the IBM 3279: reverse
video, field blink, and underline. The 25th line is provided
for a status line which provides the operator with updated
information on operating modes, error messages, and
communications.
The keyboard is an 87 key IBM EBCDIC typewriter style,
similartothe IBM 462X series withextended features, and
a numeric pad (see Figure 1-1). Program function keys 13
through 24 are invoked
in the alter mOCle rather than the
standard mode as with the IBM 3276. Keyboard features
include typamatic operation, and two-key rollover. Indi-
vidual field selection is provided through the CURSR SEL
key. The monocase display feature (known herein as
lowercase inhibit) is provided in a modified form.
The controller portion of the display station appears to the
mainframe/host as an IBM 3287 Model 1 printer, thereby
making the terminal compatible with existing mainframe
and applications programs. The controller also provides
the translation required to allow the use of
an ASCII printer
which utilizes an RS232C type interface.
DUP
FIELD
MARK
7 8 9
... ,
PA2 PF13
PFU Pf15
i
,,,.
4 5 6
PA3 PF16 PF17
PF18
t ' 1 2 3
PF19
PF20
PF21
-
....
• 0
--
PF22 PF23
PF2•
Figure 1-1 DM3270 Keyboard Layout
1-1

Dl8jllllyFormat
24 X 80 characters
Dleplay Memory
24 lines of 80characters
Shltue Line
25th hne of the display
CAT Size
12 " measured diagonally
Phoephor
Green , P42,bonded
Ct11ncter Size
ApproXJmately 0.2" high XO ., .. wide
Cheracter Type (Alpllameric)
Table 1-1
128diepleyllble cheracl9rs, 9Kll formed within en 6 X 7
matrix within en 8 X 10 cell. De9cenders on lower cue
c:herllctel9 ere provided .
CherKter Genenttlon
MOS ROM
AefrnhAm
50 1 60 Hz (switch selectable)
Aefrnh Memory
MOS RAM
Cn.r.c:ter Dlepley
Lightcharacters or a dari< background
Vlsu•I Attrlbutff
Normal , bright,and security intensity
l.oglcelMlrtllutM
alpherneric, numericonly, protected,auto-lklp, and asubsti-
tute feature forthe light pen, usingthecureorlocation andthe
CURSR SEL key.
Extended Hlghllehl ,,_,..
~Video
Field Blink
Undettine
c-
Nondestructive blcx:k or underline, blinking or nonblinking
(Mlecled by keyboerd entry)
C-Conlrol
Up, down, left, right, Home, new line, tab, backtab, last
ecen, leftand right
Editing Oper1lllone
lneeft/delelllcharacter
&8M Functlone
er- to end-of-field, erase variable data, and erase
llCl'IMlll
1erte1 Prtnw '"*'-
No Pnnter•tlached
Pin 11119-RMdy
Pin 11119-Busy
Pin 11119-Reverse Channel
ETXfACK
XONfOFF
ACKINAK
TTY
Col!lnlunlc8tlo lntler'-
Seriel RS232C
Tl'Wl8lllleelon A111e
o.termined by modem , up to 9600 baud
DM3270 Specifications
Communlcallons Mode
Synchronous half duplex (0118r leased or dial up lines)
Communications coci.
EBCDIC
Communk:atlone Protocol
Binary Synchronous (BSC)
Modem CompWlblllly
Compatible with a wide range of modem types.
(Bell" 201, 208, 209)
lndlceloni
All INDICATORS wiN ba provided villtheetatua line, (-
Figure 3-1).
Bell
Audible alarm upon invalid keyboen:t entry 8!ld -
click upon key entry wl*1 eelecled.
Keyboard
A detachable keyboard willl 87 keys, lndudlng a numeric
pad, cursor control keys ,edit keys, ahifl lock, 24 progrwn
function keys, and 3 program llCCell8 keys.
Self-Teet
lnniated by operator commend and upon poweNP . Ex·
tensively teststhe tenninal.
Monitor Mode
Data link analyzer displays all ood99 (-Figure 3·2).
Input Volhlge end Frequency
115VAC + - 10%@60Hz
·230 VAC + - 10%@50Hz
Envlronmental Speclllc:ellol•
Altitude: Oto 10,0001881
Telnperature : Oto40deg<eMC
HumidilY: Oto 80% (no110011de11alng)
T errnlnel Size
Monnor :
Keyboard:
Combined :
Keyboard Cable Length:
Terrnlnel Weight
Monnor :
Keyboard:
Total:
Shipping Weight:
IBM Featurn Not Support8cl
Security Keylock
Magnetic Read Control
18.5" (41 .9cm)deepx
182 " (48.2om) wide x
13.1" (33. 3Cm) high
9.1" (23.1om) deepx 19.4"(48.3Cm) wide
x 2.9" (7.4cm) high
25 .5" (64.7om) deep X 19 . 25 (48. 9cm)wideX
13. 1" (3.'!.3om) high
21881(.61,,_.)
341ba.
41ba.
38 Iba .
50 Iba .
APL and Data EntryKeyboards
Numeric Lock
T
enninal Clustering
Multiple Printers and the Authot1zalion
Rating
3276 Dial Operation
Nonbuflered Print
14 Bit Butler Addressing
SNA Protocol
lntegrllted Modems
• May be a regist ered trademari<
Figul'e 1-2 DM3270 Terminal

SECTION II
INSTALLATION
2.1 INTRODUCTION
This section contains information on unpacking, receiving/
inspection, connection of
the communications interface,
physical placei'nent
of the terminal, and functional control
settingsforspecificuserrequirements.
2.2 UNPACKING
The following items are fumished with each DM3270
terminal:
a. The display terminal with detachablekeyboard.
b. Technical UserManual.
c. Warranty retum card and amanual order form blank.
There are no tie-downs or packing materials inside the
plasticcoverthat need to be removed.
2.3 INSPECTION FOR IN-SHIPMENTDAMAGE
All Beehive terminals are packed in material designed to
withstand normal handling in transit. Mishandling should
be evident upon inspection of the shipping container. If
evidenceofexcessivemoisture, heatorphysical damage is
observedon the exteriorofthe shipping container, be care-
ful to inspect the terminal for any irregularities immediately
so that a claim can be filed with the carrier. Save all evi-
dence (including the shipping· container), document the
damage with photographs. Save the container
and pack-
ing material for any Mure shipping which may be neces-
sary.
1311-"
33.3cm
25Y,"
14.7cm
2.4 IDENTIFICATION
An identification plate is located on the rear ofthe terminal
and provides the model number, part number, serial num-
ber, weight, voltage/current requirements, and frequency/
powerclassifications.
2.5 INSTALLATION
2.s.1 Placementfor Operation
The terrriinal is ~lly self-contained exceptfor the AC power
source and appropriate 110 cables (terminal to modem
and/orterminal to printer) making it
very easy to install or
move. Selectaconvenient, level surfacewhere the cables
are·not in the way ofthe opera,or and are notinadvertently
pulled or disturbed by minor changes in the terminal's
position. The keyboard should
be placed so that operator
use is as comfortable as possible.
CAUTION: Do not place the termln11I on •ny surface
that blocke cooling •Ir from the bllck of the Cllblnet.The
termlNll hu •n lntern•I tan for cooling which clrcu-
llltes •Ir through a grille In the bllck Md to spmclng mt
the bottom sides between the cover llnd terminal
frame. To maintain efficient air clrcul.tlon, keep at
least three-and-one-haH Inches of clearance at the rear
andsides of the termln11I (seeFigure2-1).
Allow at least 3.5 inches clearance on sides
and back of terminal to permit adequate air
circulation.
Figure 2·1 Mounting Requirements
2-1

GROUN~. I w
115 Volt
GROUND
230Volt
lnternetlonal RequhwMntPlug
Figure2·2 AC Powerand Ground Connectors
2.5.2 AC PowerConnection
The terminal isshipped with either a 115or 230 volt power
cord and a corresponding Internal power transformer con-
figuration. Your AC power outlet must supply a voltage
within +
-10% pf 115 or 230 volts(whiclMMfrisconfigured)
for proper operation.
The grounding conductors indicated in Figura 2-2 provide
important electrical connections which should always be
preserved by plugging .the terminal into a properly
grounded outlet or adapter. Grounding is vital not only
from an operator safety standpoint, but also to suppress
radio frequency/electromagnetic interference (RFl/EMI)
and drain off static electricity charges which may accumu-
late and impairdataintegrity.
Any extension cord used to provide power to the terminal
must be three wire type which preseives grounding in-
tegrity. Its wire size must be sufficient to insure adherence
to local electricalcodes.
Table 2·1 Main Port Pin Assignments
PIN RS2320 DESCR. SIGNAL ASSIGNMENTS
NO.
DIRECTION
1
AA
Fr-
-
C.._,. ground; electrlc:8lly bonded lo
Ground
"-·
2
BA
T111111Nnlt
m.--oau. Set
Pin2wlllbeInthe11M1k c:ondlllon wtlh
Data no
outPut elgnlll
3 BB
Receive
OM-Data Set
Datafrom hoet
Data
4
CA
Request
DM--Data Set
a- hi during ............ ; drape
to Send
lo upon-...i1on.
5 CP
Clear to
DM-DataSet
Whenhl,--IMlonle .........
Send
When held lo, --••Ion ..
~-
6 cc Data
Set
OM-Data Set
~--•r-.ty.
Raady
7
AB
Signal
-
S-potentlal •~ground
Ground
(pint).
15
DB
Tranamlt
'*-"Data Set
Xl T111111Nftlaalon cloc:ll from modem.
Clock
17
DD
Receive
OM-Data Set
Xl Receive Clock from modem.
Clock
20
CD Data
OU-Data Set
Held hi"'*' Ille .............. l'Mdy.
Terminal
Ready
.,_.,
2.5.3 Data Interface Connection
Signals used in communicating with the DM3270 conform
to the requirements of EIA specification RS232C. Inparti- .
cular, output voltagesswing from -10V to+ 10V, while the
receivers presenta minimum of 3k ohms impedanceto the
line. The input resistance is approximately 4k ohms. The
driver circuits have acurrent limit of 10 mA on both source
and sink. All data source interconnections are made via
the rear panel input/outputconnector (see Figure 2-3). A
25-pin miniature 0-type ITT Cannonconnector (DM-258 or
equivalent) is used for connection to the computer. Pin
assignments
are defined in Tables 2-1 and 2-2. Thecom-
municationsline from the modem connectstothemainport
and theprinterconnects totheAUXport(printerport).
Table 2·2 PrinterPort Pin Assignments
PIN ~S232C
NO. DESCR. SIGNAL
DIRECTION ASSIGNMENTS
1 AA Frame
-
Chaaala ground; elec:trlc:911y bonmd to
Ground
Ir•-·
2 BA Receive ou-Prlntlw
Data received from printer.
Data
Du.!-Prtm.r
Transmit Data
output lo prlnt9r.
3 BB Data
4 CA Request
OM-Printer lg- by DM3270
to Send
5 CB Clear
OU-Prl-
"--Ina hi .. Ml tllMe.
Send
6 cc Data
Set
~Prl-
~hl .. .Ut"-.
Reedy
7
AB
Signal
-
Sa- potential H pin 1.
Ground
8
CF
Carrier
DM-Prlnter
"--Ina hi at .. ,...,...
Detect
11
Printer DM-Prtm.r
'#1*1 hi, prinWCM ._iwdmla.
Not Busy
'#1*1 lo,~ labuay.
111
Prlnl9r
DM-Prl...,. Sllme• Pin 11
20
CD
Not euy!
Data
DM-Prlni.r
When hi, prlnl9r la onllna.
Termin•I
When lo, pr..- la ollllne.
Raadv
2.5.4 PC ao.rd-MountedControlSWltchH
Three switch blocks are mounted on the printed circuit
board. Two are located at the rear of the board and are
accessible for resetting through an external opening. The
otherswitch block is located near the left rear comer of the
board and can be reached by removing the cover. These
switches are illustrated in Figure2-3.
2.6
INmAL TURN-<>N PROCEDURE
The proper tum on procedure for the terminal is described
in Subhead 3.1.2.
2.7 REAR PANELSWITCH USE
The operating configuration of the DM3270 is defined by
rear panel and internal switch positions as described in

Figure2-3 and the remainderofthis subsection.
2. 7 .1 LCI -LowerCase lnhlbH 51-1
When LCI is not selected (S 1-1 down), alpha characters
are displayed in upper and lower case just as they are
entered in the display buffer. When LCI is selected
(S1-1
up), all lower case character codes are entered and dis-
played upper case characters. Changing the switch set-
tingonlyaffectsdataentered intothedisplaybufferafter the
switch as been changed. Data already displayed is not
affected.
2. 7.2 Setting UpContention Protocol
(Point-to-Point)*
The terminal may Qe configured in a contention protocol or
point-to-point mode (switched line, dial up). This protocol
allows the host to interact, by specific address, with up to
128lerminals. Setthe rear panel switches as follows:
1. Set switch 4 of the internal switch block 3 (S3) to the
"on" position (see Figure 2.3).
2.
To set the terminal address, use the following chart
and setswitches2 through 8 on external switch S1to
reflectthe desired 3 digitterminal l.D. number.
Table 2-3 Contention Protocol (point-to-point)
TERMINAL SWITCH NUlll8ERS
l.D.NUMBER
2 3 4 5 a 7 •
000 OFF OFF OFF OFF OFF OFF OFF
001 OFF OFF OFF OFF OFF OFF
ON
002 OFF OFF OFF OFF OFF ON
.OFF
003
OFF OFF OFF OFF OFF
ON
ON
004 OFF OFF OFF OFF
ON
OFF OFF
005 OFF OFF OFF OFF
ON
OFF
ON
006 OFF OFF OFF OFF
ON ON
OFF
007 OFF OFF OFF OFF
ON
ON
ON
008 OFF OFF OFF ON OFF OFF OFF
009 OFF OFF OFF ON OFF OFF ON
010 OFF OFF OFF
ON
OFF
ON
OFF
011 OFF OFF OFF
ON OFF
ON ON
012 OFF OFF OFF
ON ON OFF OFF
013 OFF OFF OFF
ON
ON
OFF
ON
014 OFF OFF OFF ON ON
ON OFF
015 OFF OFF OFF
ON
ON. ON
ON
016 OFF OFF ON OFF OFF OFF OFF
017
OFF OFF ON OFF OFF OFF
ON
018 OFF OFF
ON OFF OFF
ON OFF
019 OFF OFF ON OFF OFF ON
ON
020 OFF OFF ON OFF ON OFF OFF
021 OFF OFF
ON OFF
ON OFF ON
022 OFF OFF ON OFF ON
ON OFF
023 OFF OFF
ON OFF
ON
ON ON
024 OFF OFF ON ON OFF OFF OFF
025 OFF OFF ON ON OFF OFF
ON
026 OFF OFF ON ON
OFF ON OFF
027 OFF OFF ON
ON OFF
ON
ON
028 OFF OFF ON
ON ON OFF OFF
029 OFF OFF
ON ON
ON
OFF
ON
030 OFF OFF ON
ON ON
ON
OFF
031 OFF OFF ON ON
ON ON ON
032 OFF ON OFF OFF OFF OFF OFF
033 OFF
ON OFF OFF OFF OFF
ON
034 OFF ON OFF OFF OFF ON OFF
035 OFF ON
OFF OFF OFF
ON
ON
036 OFF ON OFF OFF
ON
OFF OFF
037 OFF
ON
OFF OFF ON OFF ON
038 OFF ON OFF OFF ON ON OFF
039 OFF ON OFF OFF ON
ON
ON
040 OFF ON
OFF ON OFF OFF OFF
041 OFF ON OFF
ON
OFF OFI" ON
042 OFF
ON OFF ON OFF ON OFF
043 OFF
ON
OFF
ON
OFF ON
ON
044 OFF
ON OFF
ON ON OFF OFF
045 OFF ON OFF ON ON Oi'F ON
2-3
TERMINAL
__ ,j
l.D.NUMBER SWITCH NUMBERS
2 3 4 5 6 7
~- -- ---- ---
046
OFF
ON OFF ON
ON
ON
OFF
047 OFF ON OFF
ON
ON
ON
ON
048 OFF ON ON
OFF OFF OFF
OFF
049 OFF ON ON OFF OFF OFF
ON
050 OFF ON ON OFF OFF
ON
OFF
051 OFF
ON ON OFF OFF
ON ON
052 OFF
ON
ON
OFF ON OFF
OFF
053 OFF ON ON OFF ON OFF
ON
054 OFF ON ON OFF ON
ON
OFF
055 OFF ON ON OFF
ON ON
ON
056 OFF
ON
ON
ON OFF OFF OFF
057 OFF ON
ON ON OFF OFF
ON
058 OFF ON ON ON OFF ON
OFF
059 OFF ON ON ON OFF
ON ON
060 OFF ON ON ON
ON
OFF OFF
061 OFF ON ON
ON ON OFF ON
062 OFF ON ON ON
ON
ON OFF
063 OFF ON
ON
ON ON ON ON
064 ON OFF OFF OFF OFF OFF OFF
065 ON OFF OFF OFF OFF OFF
ON
066 ON OFF OFF OFF OFF
ON OFF
067 ON OFF OFF OFF OFF
ON ON
068 ON OFF OFF OFF ON OFF
OFF
069 ON OFF OFF OFF ON OFF
ON
070 ON OFF OFF OFF
ON ON
OFF
071 ON OFF OFF OFF
ON
ON ON
072 ON OFF OFF ON OFF OFF
OFF
073 ON OFF OFF
ON OFF OFF ON
074 ON OFF OFF
ON OFF ON OFF
075 ON OFF
OFF. ON OFF
ON ON
076 ON OFF OFF
ON
ON
OFF OFF
077 ON OFF OFF
ON ON OFF ON
078 ON OFF OFF
ON ON ON OFF
079
ON OFF OFF ON
ON ON ON
080 ON OFF OFF
ON OFF OFF
OFF
081 ON OFF ON OFF OFF OFF
ON
082 ON OFF ON OFF OFF
ON
OFF
083 ON OFF ON OFF OFF
ON
ON
084 ON OFF
ON
OFF ON OFF OFF
085 ON OFF ON OFF
ON
OFF ON
086 ON OFF ON OFF
ON ON
OFF
087
ON OFF
ON OFF ON ON
ON
088 ON OFF ON
ON OFF OFF OFF
089 ON OFF ON ON OFF OFF
ON
090 ON OFF
ON ON
OFF
ON OFF
091 ON OFF ON
ON
OFF
ON ON
092 ON OFF
ON ON ON
OFF OFF
093 ON OFF ON
ON ON
OFF
ON
094 ON OFF
ON ON ON
ON
OFF
095 ON OFF
ON ON
ON
ON ON
096 ON ON OFF OFF OFF OFF OFF
097 ON
ON
OFF OFF OFF OFF
ON
098 ON ON OFF OFF OFF
ON
OFF
099 ON ON
OFF OFF OFF
ON ON
100 ON
ON OFF OFF
ON OFF OFF
101 ON ON
OFF OFF ON OFF
ON
102 ON
ON OFF OFF ON
ON OFF
103 ON ON OFF OFF ON
ON ON
104 ON ON OFF
ON OFF OFF OFF
105 ON ON OFF
ON
OFF OFF
ON
106 ON
ON OFF
ON OFF ON OFF
107 ON
ON OFF
ON OFF ON ON
108 ON
ON
OFF ON ON OFF OFF
109 ON
ON OFF
ON ON OFF ON
110 ON
ON
OFF ON
ON ON OFF
111
ON ON
OFF ON ON ON ON
!
112 ON
ON ON OFF OFF OFF
OFF
113
ON ON
ON OFF OFF OFF
ON
114 ON ON
ON OFF OFF
ON OFF
115 ON ON
ON OFF OFF
ON
ON
116 ON
ON ON
OFF ON OFF OFF
117 ON ON
ON OFF ON
OFF
ON
118 ON ON
ON OFF ON
ON
OFF
119 ON ON
ON
OFF ON
ON ON
120
ON ON
ON ON OFF OFF OFF
121
ON ON
ON ON OFF OFF ON
122 ON ON
ON ON
OFF ON OFF
123 ON
ON ON ON OFF
ON
ON
124 ON
ON ON ON ON
OFF OFF
125 ON
ON ON ON
ON
OFF
ON
126 ON
ON ON
ON ON ON OFF
127 ON
ON
ON ON ON ON ON
*NOTE: Disregard paragraphs 2.7.4, Printer Address and
2.7.5, DM3270 Control Unit Address when using 3275
point-to-point. Use these paragraphs when operating
in
3276 multipointonly.

S1-4 51-5 51-6 51-7
Down Down
Down Down
Down
Down Down
Down
Down Down
Down Up
Down Down
Down Up
Down Down
Up Down
Down
Down Up Down
Down
Down
Up
Up
Down
Down Up Up
Down Up
Down Down
Down Up
Down Down
Down
Up
Down Up
Down
Up Down Up
Down
Up Up Down
Down
Up Up
Down
Down
Up Up Up
Down
Up Up Up
Up
Down Down Down
Up
Down
Down
Down
Up
Down
Down
Up
Up
Down
Down Up
Up
Down Up
Down
Up
Down Up
Down
Up
Down Up
lJp
Up
Down
Up
Up
Up
Up
Down
Down
Up Up
Down
Down
Up
Up
Down
Up
Up Up
Down Up
Up Up Up
Down
Up Up
Up Down
Up Up
Up Up
Up Up
Up Up
Table2-3 Control Unit AddrMe Chart
3278 ModeOnly
Control Unit
Control Unit
Code (EBCDIC)
or Device
110
Hex
51-8 Address Char. Code
Down 0
SP
40
Up 1 A
C1
Down 2 B
C2
Up
3 c
C3
Down 4 D
C4
Up s E cs
Down
6 F
C6
Up 7 G
C7
Down 8 H
ca
Up 9 I
C9
Down
10
¢
4A
Up
11
48
Down
12
<
4C
Up
13
(
4D
Down 14
+
4E
Up
15
I
4F
I
Down
16
& 50
Up
17 J
D1
Down
18
K
D2
Up
19 L
D3
Down 20
M D4
Up
21
N
D5
Down 22 0
D6
Up
23
p
D7
Down 24
Q
08
Up 2S
R
09
Down 26
'
5A
Up
27
$
S8
Down
28
.
SC
Up
29
)
SD
Down
30
.
SE
Up
31
1
SF
Select Poll
1/0
Hex
Char. Code
-60
I
61
s
E2
T
E3
u E4
v ES
w E6
x
E7
y
ES
z E9
6A
. 68
O/o
6C
-
6D
>
6E
? 6F
0
FO
1
F1
2
F2
3
F3
4 F4
5
FS
6
F6
7
F7
8
F8
9
F9
7A
# 78
@
7C
7D
=
7E
..
7F

I\)
cJ,
PRINTER
SWITCH Sl
-
1 l~ll CASE DISMlE ·w
OWIACll• .-U'fl
~--
1 z J ..
-
z•a.urw
] - w ....
COll11IOl 11111'
0 I 1 J 4 S (()) JO JI
-
...............
, ............. .
- .... - w.. • ..
...............
DltUPDllWl*W DllUP
..
l
1
l
-
•
!
•
-
7
I
SWITCH S2
PMITtR CONTROL
-
......
IUSY
.......
ITIM:ll
.... "°"
--
l1't
... ...
...
... ..
..
..
..
... ... .. ..
... ...
..
..
...
..
... ..
...
.. ...
..
PMfTtll MUD llATt
110 ISO
-
....
uoo
--
.....
... ... ... ...
..
..
..
..
... ...
.. ..
... ...
.. ..
...
.. ... ..
... .. ... ..
l'MITU PAllTY
Mii
....,.
--
... ...
.. ..
...
.. ... ..
SEE OPERATORS MANUAL FOR FURTHER INFORMATION
ON
FUSE
DP
.0
1AMP
0
115V
W .5AMP
E 230V
OFF R ~
POWER CORD
...............
........ ..... .
·1.·1.·:.·.·.::.·.·······
AUX
MAIN
Printer Port
EXTERNAL SWITCHES
DM3270
0
©
CONT
SWITCH S1 SWITCH S2
011 II II
BRT 12345678 1 2345678
INTERNALSWITCH S3
ON SWITCH
Non Buffered Print Enable 1
Format
Local Print 2
Dispaly Programmed
3'
for50Hz
3275 Point-to-point
4"
Not used 5
Must
be on
6
Must
be on
7
Not used B
OFF
Non Buffered Print Disable
IBM 3276 Local Print
Display Programmed
for60Hz
3276 Multipoint
Notused
Notused
ASCII code EBCDIC code
HOST •NOTE:
Monitor alignment may be necesa.y ii thl• ewltchla c:Nnged.
"NOTE: If "on", printer addrnaing will no longer apply.
MODEM
Figure 2-3 Internal and External Switches With Communications Hookup

2.7.3 Optional Beehive Prlnter(P1600)
A desk top serial printer for use as an IBM 3287 type
printing unit. This printer will print via the DM3270 control
unit datafrom thehost
or directfrom the DM3270. Consult
the Printer Operator manual, sent with the printer, for fur-
ther installation instructions.
2.7.4 Printer AddrHs (S1-2, S1·3)*
These switches specify the address used by the host to
select the printer when in the 3276contention mode. The
addresscan be any number from 1-4selected asfollows:
~ex
Device/ Code
1/0
S1-2 S1-3 Address Number Char
Down Down 1
C1
A
Down Up 2 C2 B
Up Oown 3 C3 c
Up Up 4
C4
D
2. 7.5 DM3270 Control Unit Address*
S1-4, S1-5, S1-8, S1-7, S1-8
This is the address by which. the DM3270 is polled or
selected by the host when in 3276 contention mode. The
address can
be any number in a program from 0-31
selected from Table 2-3. Also shown are the actual 110
charaters transmitted over the communications line for
each control unit address
and for each printer address. I/
0 character (")istransmitted asthe deviceaddress during
a general poll operation.
2.7.6 Printer FlowControlS2-1, S2-2, S2-3
Severaltypes of printers can be attachedto the printerport
of the DM3270. These printers use different means for
signaling the DM3270 that the printer is busy and cannot
accept data. Each printer must provide Data Terminal
Ready (OTA) on Pi_n 20.
S2-1 $2-2 $2-3 Flow Control Type
and PrinterType
Down Down Down No Printerattached
Down Down Up Pin
11/19 =Ready
Down Up Down Pin 11/19 =Busy
down Up Up Pin 11/19 =Reverse
Channel
Up Down Down
ETX/ACK
Up Down Up XON/OFF
Up Up Down ACK/NAK
Up Up Up TTY
*NOTE: Disregard paragraphs 2.7.4, Printer Address
· and 2. 7.5, DM3270Control UnitAddress when using3275
point-to-point. Use these paragraphs when operating in
3276multipointonly.
2.7.7 Printer Speed S2-4, S2-5, S2-6
These switches allow the userto match the terminal baud
rate (through the AUX I printer port) with the printer baud
rate.
S2-4 $2-5 $2-6 Baud Rate
Down Down Down 110 (2stop bits)
Down Down Up 150
(1 stop bit)
Down Up Down 300 (1stop bit)
Down Up Up 600
(1 stopbit)
Up Down
Down
1200 (1 stop bit)
Up
Down Up 2400
(1 stopbit)
Up Up
Down
4800 (1 stop bit)
Up Up Up
9600 (1 stopbit)
2. 7.8 Printer Parity S2-7, S2-8
These switches match the parity of the terminal with the
parity of the printer. The switches have the following
definitions:
$2-7 S2-8
Down Down
Down Up
Up Down
Up Up
2.8 INTERNAL SWITCH USE
S3-1,S3-2,S3-3
Parity
Even
Space
Odd
Marl<
lntemalswitch S3-1 isusedtospecify whetherthe DM3270
will support the buffered or non-buffered print command.
The buffer printer operation requires a unique printer ad-
dress, where the non-buffered print uses the CRT as the
buffer.
lntemal switch S3-2 is used to provide additional printer
support. With thisswitch in theonposition, a local printwill
notcompress nulllines and willdoaform feed aftertheprint
is completed. This option allows information that is dis-
playedon the screento be formattedonforms using a local
print ..
lntemal switch 83-3 specifies the frequency of the power
source. The display should match the power line fre-
quency to avoidbeat interference.
Switch 4 is "on" for3275 point-to-point protocol (see Sub-
head 2.7.2) and "off" for 3276 multipoint protoool (see
Subhead2.7.4 and 2.7.5).
2-6
Switches 6 and. 7 must always be on and should not be
changed since they control the reverse videoand highlight
features.

SECTION Ill
OPERATION
3.1 BASIC OPERATION
Thissection providesdetailed operating instructionsforthe
DM3270 Control Unit Display Station. Subhead 3. 1 pro-
vides a description ofthe basic operating environment and
explains how to tum on the terminal. Subhead 3.2 gives a
detailed description of the operation of the display and
Subhead3.3describes
how tooperatethekeyboard. Sub-
head 3.4 describes the operation of the printer, and Sub-
head 3.5 describes the self-confidence test provided with
theterminal.
3. 1.1 Operating Environment
The DM3270 is a remote terminal operating in a polled
communications environment where operation may be
over either leased/dedicated communication lines
or
through a display facility. For this use, the terminal does
not communicate with the host computer as each key on
the keyboard is depressed. Instead, the operator enters a
logical set of data into the terminal's display buffer in re-
sponse to a request from a host program and then trans-
mits all the datatothe hostas a single message.
A logical set
of data could consist of several paragraphs of
a document being edited (unformatted data),
it could be
several fields of data entered in response to a formatted
display produced by a host application program, or it could
be the selection of an item from a displayed menu. When
the requested data has been entered, the operator uses
one
of the program attention keys to tell the terminal to
transmit data to the host. At the next poll or request from
the host for a data transmission, the terminal's display
buffer is transmitted to the host. The operator then waits
while the host program processes the entered data and
generates a response which is usually displayed on the
screen. The response may include a request for more
data. A typical application will include a series of such
operations as has just been described.
The display screen keeps the operator informed on the
state
of the terminal. The first 24 linesshowthe contents of
thedisplaybuffer. Any changein the contents ofthe buffer,
eitherbytheoperator (through the keyboard) orby the host
is immediately shown on the display. The 25th line of the
display is a status line which informs the operator of all
otheraspects of theterminal'soperation. Forexample, the
operator can tell if the terminal is being polled
by the host,
whetheror not the terminal is transmitting
or receiving data
from the host, the status of the printer, whether
or not the
keyboard is enabled and the type of field into which data is
currentlybeing entered. Subhead 3.2describesthestatus
line display and its operation.
Keyboard operation is simple and straightforward. Any
typist can master the keyboard, which bears a close re-
3-1
semblance to the standard typewriter. The few additional
keys function as operator-oriented convenience features
and selector switches for the terminal's operating modes.
Subhead 3.3 describes in detail how to operate the key-
board.
The printer (if attached)
is shared by the terminal operator
and the host. The operator can request a print out of the
terminals's display buffer and the host can independently
transmit data to the terminal for printing without disturbing
the display. Subhead 3.4 describes printer operation
in
detail.
3.1.2 Turn-On Procedure
Before the DM3270 is used, it must be properly installed
and setup in accordance with Section 2 of this manual.
The installationshould bedoneonlyby qualified personnel.
An identification plate located on the rear panel of the
terminal specifies its electrical powerrequirements. When
moving the terminal to an alternate operating position,
make sure that the selected power outlet
is properly
grounded and supplies the correct operating voltage and
frequency. Gettechnical assistance, if necessary,
in mak-
ing this determination.
Theproperturn-on procedurefortheterminal
is as follows:
a. Setthe rear panel POWER ON/OFF switch to ON (see
Figure 2-3; allow a warm-up period of about a minute
and ensure that the cursor and status line have ap-
peared on the screen. If both the cursor and status
line do not appear, check the brightness and contrast
adjustments as explained
in b.
b. Tum the brightness control (BAT located on the rear
panel; see Figure 2-3, if necessary) until a raster is
faintly visible on the screen. Enter several characters
on the screen. Reduce the brightness until the back-
ground raster (diagonal lines) is extinguished. Adjust
the contrast control (CONT on the rear panel) until the
characters are easily read in the available room light.
The adjustment can best be made when characters are
displayed in both normal and bright intensity. Such a
display must becalled up from the host CPU.
c. Any time power is initially applied to the DM3270, it
performs a display memory test and a terminal opera-
tion test. Because of the CRT warmup time, there is no
visible effect on the screen. If the unit is turned off and
back on, a slight display flicker occurs while the test
is
run. When the self-test is successfully completed,
"Idle" appears on the status line.
In the event of a test
failure, error messages (see Subhead 3.2.5) will appear

on the screen. The self-test may also be initiated by
pressing the TEST key.
3.1.3 Rear Pmwl Switches
Switch blocks 1 and 2 (S 1and S2) onthe rear panel select
certain operating features of the DM3270. There are a
total of 16 miniature switches, eight on each switch block.
Most rear panel switches require no operator attention
because they must be properly set when the terminal is
installed. Subhead 2. 7describes how to changeaswitch.
3.1.4 AudibleAlarm
The audible alarm capability within the terminal alerts the
operatorwhenerrorconditions arise. Thefollowing condi-
tions soundtheaudiblealarm.
1. At the start of the self-confidence test.
2. An invalid keyboard entry.
3. Thehostcomputerwantsto alert theoperator.
3.2 DISPLAYOPERATION
3.2.1 Dl8plllyFormat Md Ctt..:ter SM
Datato be displayed on the CRT screen isstored in a1,920
character buffer. The data is displayed as 24 lines of 80
characters. The data in the buffer consists of displayable
data and field attributes. Thedisplayable data consists of
95 EBCDIC displayable characters (alphanumerics-in-
cludes space) and 11 graphic symbols for drawing lines
and tables. Data are entered into the display buffer and
consequently displayed on the screen either by the oper-
ator pressing keyson the keyboard or by thehost transmit-
ting data over the communications lineto the DM3270.The
graphicsymbolscanonly
be placed in the displaybuffer by
the host. There are no keys on the keyboard for this pur-
pose.
3.2.2 CUraorOperation
A cursor is provided to identify the position in the display
where the nextcharacterentered from thekeyboard will be
displayed. Twotypesofcursorscanbedisplayed: 1) The
normal cursor appears as an underline. 2) The altemate
cursor appears as a reverse image of the character dis-
played in
the cursor position, i.e.,a darkcharacter ina light
background. By using the ALT CURSR and CURSR
BLINKkeys (see Figure3-2, page 1), thetypeofcursorcan
be selected and the cursor can be madeto appear steady
orblink on and offcontinuously.
When the cursor ispositioned overan existingcharacter in
the display, that character will still be visible and can be
changed or deleted by keyboard action. Only one cursor
will appear in
the display. When the terminal is turned on,
the cursor will appear at the leftmost character position of
the first line of a blank screen. The cursor can be moved
aroundthescreen by usingthecursormovementkeys (see
3-2
Figure3-2).
3.2.3 DleplayFlelds
The host CPU can organize the display, in one or more
separatedisplayfields, by the introductionofattribute char-
acters into the display buffer. Theoperator can only enter
displayabledatainto the display buffer.
Displayfields can simplifyoperations, bolh for theoperator
and for 1he programmer. Headings can be disptayed to
prompt the operatorto enter data and separate fields can
be defined for entry of the data. The host program can
identify the fields thatcontain ent8l'8d data without reading
the entire buffer. The field can also be restricted as tothe
data thatcanbeentered, thus saving the program time on
enorchecks. In addition,theattributecharacterserves as
a tab stop. This makes it easier for the operator to move
the cursor from one field to anolher by using the tabbing
keys.
A display field begins with an attribute character. This
characleroccupies a display position on the screen but is
displayed as a blank. All characler positions following th~
atlribute cbaracter up to , but not including, the next attri-
bute character constitute the field. A field may wrap from
one line to the next, i.e., if the field begins in the middle of
one line and the nextattribute character is located inother
thanthefirst character position of the next line, the field will
contain character positions in bolh lines. Similarly, a field
may wrap the screen. H the first character position of the
firstlineof the display does notcontainan attributecharac-
ter, the last field of the screen will wrapfrom the last line of
the display to the first line. All logical attributes (see Sub·
head 3.2.4) will wrap with a field and visual attributes will
wrapfrom lineto lineorfrom thebottomto thetoplineofthe
screen.
3.2.4 FieldAttributes
There are two types of field attributes, visual and logical.
Vasual attributes determine the manfl8r in which the fields
appears to someone observing the screen. Data are nor-
mallydisplayedata nonnal intensity (normal mode). If it is
desirable to highlight an important field, the field can be
intensified (intensified mode), and the field will appear
much brighter. A field can also be displayed in security
mode. Even though the data exists in the display buffer.
the data witl be dislayed as blanks. This mode can be
used, tor example, toenter a password without allowing it
being observed by someone else looking at the screen.
The DM3270 also provides the extended field highlighting
capability of the IBM 3278. This field highlighting attribute
provides thecapability of underlining, blinking and reverse
video.
Logical attributes can be used to restrict data entry in a
particularfield. Thefleldcanbed8ftnedeither as protected
orunprotecl8d. Data cannot be enteredfrom the keyboard
into a protected field. An attemptto enter datainto a pro-
tected field will disable the keyboard and the operatorwill
not be abletoenter any data untiltheRESET key isdepres-
sed (see Subhead3.3.4). A protectedfield maybedefined

as an automaticskipfield. Thisattributecauses thecursor
to skip to the next unprotected field when it enters an
automatic skip field, which again makes it easier for the
operator to move from one datafield to another.
Ifa field isunprotected, it canalso be definedasalphameric
or numeric. Any displayablecharactercan be entered into
an alphamericfield. Onlynumericdatacan beenteredinto
a numericfield (see Subhead 3.3.4). Again, an attemptto
enter invalid data into a numeric field will disable the key-
board.
Any displayed field niay be given the selector light pen
detectable attribute.This attribute allows the field to be
selected for transmission to the host by operating the
CURSR SET key. This feature allows the programmer to
restrict the amount of data that must be transmitted to the
host.
3.2.5 Statue Une
The statuslineoccupies the 25thlineofthedisplay. Itisnot
accessible
to the operator or the host. It isonly accessible
to the DM3270 for the display of current status informa-
tion. Normal status indicationsare
display~ as darkchar-
acters in a light background. Error indications can be dis-
played in a blinking mode. Thestatus line contains 9 fields,
A - I, spaced sequentially across the line. Each field is
separated from the next field by one character position
displayed as a blank in normal video mode (dark back-
ground). Each field is discussed in Figure 3-1.
3.2.6 LowerCase Inhibit (LCI)
LCI mode allows the operator to limit the display to upper
case characters only. When the LCI switch is in the inhibit
position (see Figure 2-3), all new alphabetic character
codes entered intothe display buffer, eitherfrom the 1/0 or
the keyboard, are stored and displayed as upper case
characters. When the LCI switch is changed to the non-
inhibit position, new alphabetic character codes entered
are stored and displayed in theirnatural mode (as upperor
lowercase characters). When the switch is changed back
and forth from
one position to another, previous data en-
tered
on the screen are not updated by the switch.
3.3 KEYBOARD OPERATION
The keyboard enables the operator to change, edit, or
~-A _ __.I [D 01 ..._ _o ___.I .___I _E ___.I .__I _F_· _l .__I _G __ l .._I _H _
1 __.
Field A
lndic.te• wh91Mrtn. k9ybo9rd I• lnhlb!Md or not. Th91M9Mg9
"Input lnhiblt9CI" will b9 di91>layed wi.n.v.r t"9 .,,,.,.ior ainnot
key In •ny claUI. S.. SubhHd 3.3.3 for t"9 •lluatloM lhllt wlll
ceu• thla !MaNge end how to clNr 11.
FieldB
lndlcetee tn. .- of the tenninel in communiceting with t"9
ho•t. TM 1MaNge9 that cen b9 diepieyed In thia lleld .,. ••
followa:
The t•nninel I• In an Idle atete. Reier to the poll lleld of
IDLE the •tetu• HM (Fleld I) to - II t"9 tenninei I• b9ing
polled by the hMt. Thi• I• theateteIn which t"9 .,,,.,.ior
c.n enter d8te.
ENTER
SYSTEM
TEXT
NOTE:
TM ENTER key h .. - depl9eud end the termlnel I•
either eweltlng • poll or tr•nmmltling text to the ho9t. Th9
keyboenl I• dl•bled.
TM tennlnel h•• recel- en acknowllldge for the lut
entry and the •Y•tem I• currently procwelng the text
rnnuge.TM keyboenl I• d._.
The termln•I h .. recelv9CI • •lllrt ul text cherec:ter (STX)
and I• .--lvlng text. Thi• IM9Ull9 wlll b9 diepieyed
until the ecknowiedge hH been unt to the ho9t. Th9
keyboerd I• dlubled.
If during any of these operations a nagative acknowledge
(NAK), a retransmit request (ENO) or a time-out is exper-
ienced, this field willblink.
.............
Field C
lndlc-the p,...,,.,.or-of the Delil Set Reedy
•ignel from the modem. Th9 lleld wfll lllw11Y• contein
the rnnuge "OSR". II the DSR •ignei la Pl998ftt, the
rnnuge wtll b9 dl91>leyed 81 normel lnten•lty and non-
bllnk mode. II the DSR •lgnei I• not pruent, the ,,__
uge will blink et bright lnten•lty.
Field D
•
.
lndlc.tn the type of llltrlbute that I• controlling the fieldIn which
the curaor I• loceted. Th9 poHlble,,,..... al9 ••fol._.:
•
•
•
•
ALPHA
Any eiphanumeric ch•- c.n b9 enter9CI.
: NUM Only numeric dlllll (0-9,.,-, or DUP) ain b9enlel9d.
•
: PROTECT No entry mey b9 ...- in thlafield.
:ATTRIBUTE
: NO TE: II any invalid entry is made, the.keyhoard will be disabled:.
: field D will blink, and field A will display ··input lnh1b1ted.
: The keyboard will remain disabled until RESET key is
~•••••••••••P,,~essed.
Field E lndlctllas whether or not either of the SHIFT k•y• is
depl9eud or the SHIFT LOCK key Is lock9CI. This flekl
will be blank when none of the keys Is c1ep .. .-. The
field will dl•pley "SHIFT' when either of theSHIFT keys
I• ctepl9eud or the SHIFT LOCK kliy I• In the locked
poaltlon.
Field F
Indicates whether or not the termlnel Is In lnurt mode.
The me11UQ9 "ln•rt" will b9 dl91>lay9CI when the oper-
ator dap19- the INSERT key. Thia field wlll be
c ... red when the keyboenl is 19Mt.
.
•
I
I
•
•
I
I
I
•
I
•
NOTE:
Ifthe operator tries to entermoredata mto a field than it can
hold, the keyboard will be disabled. Field F will blink and
field A will display "Input Inhibit."
The keyboard wlil re-
1 main disableduntil reset.
., ........... .
Field G
lndictlles the status of the printer. The 198dy •lgnel I• Data Termi-
nal
Ra9Cly (DSR). Th9 printer does not haveany l99dy signal,
therefol9, the printer la always •••umad 1911dy. The ,,__
•118• thtll c.n b9 dl91>lay9CI In thl• field a19:
PRNTRCHK
BLANK
PRNTRRDY
The tennlnel is not 19e9ivlng a l99dy aignal from the
printer.
The terminal ls 19C9Mnga 1911dy aignal lrom theprinter.
PRNTRBSY
•.........•.....
The printer is procesalng a print raqu..t.
Field H Re•rv9CI for futu19 expenalon.
Field I
This field dl91>lays a polling indicator while the terminal io being
poll9CI. Thefield I• blank when the tennlnel I• not being polled.
Figure 3-1
Status Line Messagesand Field Descriptions
3-3

create character displays and transmit them to the host
computer or to the local printer. Figure 3-2 shows the
keyboard layout and gives a functional description
of each
key.
The keyboard looks very much like a typewriter keyboard.
The keys in the center produce the alphabetic characters,
numeric characters, punctuation marks and special sym-
bols. These are displayable characters (alphamerics).
Surroundingthese keys arethespecial function keyswhich
are used to perform control functions. To the far right is a
numeric pad which is convenient to use in dataentry appli-
cations and is also used in special function operations.
3.3.1 KeyboardModes
The keyboard operates in 3 modes, unshifted, shifted, and
alter. Each mode provides a different interpretation of
some of the keys and extends the numberof key functions
without requiring an excessive number of keys. Each key
is labeled to indicate the function
it performs in each
mode. The symbols on the top face of the key indicatethe
function performed
in unshifted mode (lower symbol) and
the shifted mode (upper symbol). For example, the key
containing the 2 and @ acts as a2 in unshifted mode and a
@ in shifted mode. The symbol on the front face ofthe key
indicates the function performed in alter mode. For ex-
ample, the 2 key acts as a PROGRAM FUNCTION KEY 2
when in altermode.
The shifted mode is selected by depressing either one of
the SHIFTkeys marked with the 0 symbol
or bypressing
the SHIFT LOCK key marked with the @ symbol. The
SHIFT keys are active only while depressed. Releasing
them returns the keyboard to the unshifted mode. The
SHIFT LOCK key also becomes active when depressed
and remains active until a SHIFT key is again depressed.
The shifted status ofthe keyboard is indicated in the status
line (see Figure 3-1).
The alter mode is selected by depressing and holding the
ALT key while pressing one of the other keys. The alter
mode is used mainly to activate special function keys that
might have serious consequences if activated accidently,
e.g., the CLEAR key which would clearthedisplay buffer.
3.3.2 TypamatlcOperation
Normally, when a key is pressed, it will only perform its
intended operation once. Some keys will repeat their op-
eration continuously aslong as they are held down. This is
called typamatic operation. All alphamerickeys operate in
thismanner. Thespecial function keysthathavetypamatic
operation are identified in Figure 3-2.
ihe repeat rate is 10
characters persecond.
3.3.3 Keyboard Disable (InputInhibit)
Certain conditions disable the keyboard and prevent fur-
therentry by
the operator. This condition is indicatedbyan ·
"Input Inhibit" message in the status line and may sound
the audible alarm. See Figure
3-1 and CLICKkey descrip-
tion in Figure 3-2, page
2. The conditions that disable the
keyboard are listed below. Conditions
4, 5, and 6 cause
the audible alarm to sound.
1. Operation of any program attention key.
2. A host-initiated 1/0 operation addressed to the
terminal.
3. An operator initiated print operation, during the
transferof the display buffer to the printerbuffer. If
the printer buffer is full, the transfer cannot take
place, so the keyboard will bedisabled until the full
condition goes away.
4. Operation
of any alphameric key or of the DUP,
FIELD MARK, ERASE EOF, ordelete
key(/), when
the cursor is in a protected field or in a field-attribute
location.
5. Operation of any alphameric key not included in the
numeric grouping when the cursor is in a numeric
field.
6. Anattempt is made to insertdatainto a full field.
The keyboard disable condition can be cleared by the
following.
1. Pressing the RESET key for conditions 4, 5, and 6
above.
3-4
2. Pressing DEV CNCL for printer busy conditions
(condition 3).
3. Host initiated 1/0will be reset by specific command
from the host. Condition 1will normally be reset in
this manneralso.
3.3.4 AlphamerlcData Entry
Keyboard entry of an alphameric character into the display
bufferoccurs atthe cursor location. An attempttoenter an
alphameric character into a protected data field or into an
attributecharacterlocation will be blocked. Successfulkey-
board entry
of the alphameric character causes the cursor
to advance to the next character location within the unpro-
tected data field. If the cursor advanced to the right-most
characterposition on the line, it automatically moves to the
first character position on the following line.
If the cursor, after advancing, is at an attribute character
location, it advances to the first character position of the
field defined by the attribute character. If, however, the
field has been defined as an AUTO SKIP field, the cursor
skips to
the first character position of the next unprotected
field,
or if there are no unprotected character locations in
the buffer, tothe first character position in the buffer.
In a formatted buffer, attempting to entera character into a
field invokesseveral tests on that field. First, the field must
be defined as unprotected. Second, if the field is defined
asa numericfield,
the characterbeing enteredmustbe one
ofthe following:
0123456789.-DUP

If either of these two conditions is violated, the keyboard is
disabled.
3.3.5 Automatic Skip
Upon entry of a characterintothe last location of an unpro-
tecteddatafield, thecursoris repositioned accordingto the
attribute charactercontrolling the next field. If the attribute
character defines the next field as either alphameric (pro-
tected or unprotected) or numeric and unprotected, the
cursoris positioned atthefirstcharacter location inthefield
past the attribute character. If the attribute character de-
fines the field as numeric and protected, the cursor skips
that field and is positioned to the first location of the next
unprotectedfield.
3.4 PRINTER OPERATION
The printer is driven by its own 2K buffer, so it can operate
independentlyofthedisplay. Theoperatorrequests aprint
out by depressing the print key. This action disables the
keyboard and transfers the display buffer to a printer buf-
fer. The keyboard is reenabled as soon as the transfer is
completed. If the printer is not already busy printing, it will
immediately beginprinting the display data. Ifthe printer is
busy with a previous print job the operator's request is
Table 3-1 EBCDIC to ASCII Conversion Table
.,..
I I T T I
EBCDIC I EBCDIC
Translated
Character i HEX I ASCII
Hex Code I I
CODE
.i
NUL
T ()() i
20
T
so
T
SF
I T
> 6E 3E B C2 42
SOH
01
-?
SF
3F c I C3 43
STX
02 I -' accent
60
D C4 I 44
79 I
ETX
03
I -
3A
E
cs
I
4S
7A
HT
OS
-
II
23 F I
cs
46
VT
OB
I 7B I
OB
@ 40 G C7 47
FF
oc oc
7C I
I
7D
27
H
ca
I 48
CR
OD
OD
I
S1
2F
I C9 49
OLE 10
-= 7E
30
J
DO
I
70
SBA 11
-
..
7F 22 J 01 I 4A
EUA
12
-a
81
S1
K
02
4B
IC
13
-b 82
S2
L D3 I 4C
NL 1S
CR&LF
c 83 63 M D4 I 4D
BS 16
08 d 84 64 N
DS
4E
EM 19
-9
as 65 0 D6 I 4F
DUP 1C f 86 66 p D7 I 50
SF 10
-g 87 67 Q
DB
S1
FM 1E
h 88 68 A D9 I
S2
ITB 1F
-I 89
S9
\
EO
SC
ETB 2S
-+ (normal)
SF ES
s E2 53
ESC 27 1B I
91
I
6A
T E3
54
ENO
20
-k 92
68
u E4
SS
SYN
32 -I 93 6C v
ES
56
EOT
37 -m 94 6D w E6
S7
RA
3C -n
9S
6E x E7 58
NAK 3D -0 96
SF
y
EB 59
SPACE 40 20 p 97 70 z E9
SA
[ I 4A
SB
q 98
71
_(high)
EA
E1
• 4B 2E r 99 72
L(high)
EB C9
< 4C 3C
~
A1 7E
r<high)
EC
C1
(
4D
8 s
A2
73
t-<h1gh) I ED D9
+ 4E 2B t A3 74
~(high)
EE
DS
J
4F
SD
u A4 7S
I (high) EF ES
& so
2S
v AS
7S
0
FO
30
!
SA
21
w
AS 77 1
F1
31
$
SB 24 x A7 78 2 F2 32
SC I
2A
y
AS
79 3 F3 33
) so
29 z
A9
7A 4 F4 34
SE
I 3B L (normal) AB
ca
5 F5 35
f\
SF I
SE
r (normal) AC
co
s F6 36
-60 2D
t- (normal) AD D8 7 F7 37
I
S1
I 2F
~(normal)
AE D4 8 F8 38
I
6A 7C F9
I I I (normal) AF E4 9 39
68
2C
.J (normal) BB cc + (high) FA E9
o/o 6C I 25 1 (normal) BC C4
.J (high) FB CD
I T (normal) BD
DO
, (high) FC cs
.I. (normal) BE
DC
T (high) FD D1
I -(normal) BF
EO
.I. (high) FE DD
J l l
co
78
SPECIAL
80 1B
'ESC'
i A
C1
i
41
...i
_i
3-5

queued and will start as soon as the previous job is fin-
ished. The keyboard is disabled and the display buffer is
copied to the printer buffer as space becomes available.
When all the displaydata has been copied, the keyboard is
enabled again. Asecond printrequest could be entered by
the operator before the first one completes printing. But
the display buffercannot
be transferred to the printerbuffer
until the previous job has printed enough data to release
sufficientspace in the printerbuffertohold the new display
data. All buffers hold 2056 characters, but some of the
displaydata (security fields and null lines) may be transfer-
red on agiven printrequest. The keyboard will be disabled
until all the display data has been transferred to the printer
buffer.
The status line indicates the printer status in field G (see
Figure
3-1). A blank status indicates the printer is not
ready. This could indicate conditions such as a nonexis-
tent printer, a malfunctioning printer, the printer is out of
paper, the printer has been deselected or perhaps other
conditions. The operator will have to check the printer to
determine its status. A
PRNTR ADY status indicates the
printer
is ready foraprint request. When theprinterbegins
printing, PRNTR BSY is displayed until all the data in the
printerbuffer is printed.
3.5 SELF-CONRDENCETEST
The DM3270terminal incorporates abasicself-confidence
test to insure that the terminal is working correctly.· The
self-test is invoked when the terminal is powered on or
when the operator depresses the TEST key. When the
self-test is completed, the terminal is initialized with a clear
screen and enters the idle mode.
The self-test begins
by sounding the audible alarm and
then tests various hardware components of the terminal.
Two types of errors are detected: fatal and nonfatal. An
error
is fatal when itoccurs in the RAM memory required by
theself-test (address 8700-87FF Hex) orif it is reasonably
certain that the CRT display will not work. When a fatal
error is detected, the audible alarm will be sounded 3times
and the terminal will stop functioning. The temJinal can
only be restaffed again by turning the power off and on.
3-6
Each nonfatal error is reported by displaying a unique
number or letter code on the display screen starting
at the
Home position. The nonfatal errors and their letter codes
are listed
in Table 3-2.
The DM3270 provides line monitoring capabilities (monitor
mode) which displays all data including control characters
as they are received or transmitted. The DM3270 usually
displays only text addressed to the receiving terminal. In
monitor mode, all data that are received from the host is
displayed in normal video and all data that are sent to the
host, including pads, will be displayed in reverse video.
The operator may enter monitor mode by depressing
the
ALT, SHIFT, andTESTkeys simultaneously.
Table 3-2 Self Confidence Test Error Descriptions
Error
Code ErrorDescription
np
CRC ct.ck error for ROii chip(•) 'n',
....,.n = 1,Z.3.4.and/or5
R RAM memory
hH failed
A Printer
port blludrate cloell write/reed ..,.,r
a Main port USARTwrlta/19aderror
c':
Keyboard acannar(8255) wrlte/rellderror
D Printer
port Interrupterror
H Printer
port timeout error
I Printer
port receivererror(parity, overrun, framing)
J Printer
port racalvlld data error
K Video
clock rat• error
L Printer
port beud rate error

CURSR SEL !also see Note 1)
This key allows the operator to select certain fields displayed on the screenfor action by the host program. In atypical application, a menu of items
might be displayedandthe operator could select one or more Items from the menu.
Thereare two types of selectablefieldsthat can be displayedon the screen: 1) Mlection fieldsand 2)attentionflelds. The CURSR SELkeycan be used
to 1) select Items in selection fields and 2) notify the host program of the aelectlon by Mlectlng an llttention field. The CURSR SEL key acts like a
program attentionkey when selecting an attentionfield.
The first character of each selectable field on the screen is called a dnlgnator character. The designator character for a Mlection field is either a
question mark(?) or a greater-than sign(>); the designator character for an attention field is an ampersand character(&) or a blank. Initially the
designator characters in most of the selection fields on the screen will be qlMBtion marks. To select an Item (field), position the cursor within the
selectionfieldthat is to be selected and pl98S the CURSR SELkey. Thequestionmarkat the beginning of the selectedfieldwillchangetoagreater-than
sign to indicate that the field has been selected. H the wrong field has been selected, the mistake can be corrected by selecting the field again. This
actionchanges
the greater-than sign back to aquestionmark and deaelected thefield. The correct field can then be eelec:ted.
Program Function Keys (PF) (also see Note 1)
After completing the selectionsfrom the screen(morethanoneselection can be made), locatea selectable field (attention field)thathasan ampersand
character or a blank position for a designator character. Selectingtheattentionfield alertsthe host that data is ready to be transmitted. The keyboard
will bedisabled until the host responds.
Many of the special function keys have permanently assigned functions such as backspace, tab.
etc. Theprogramfunction keysmay be assignedfunctions by a host applicationprogram. There are24
PF keys
which can only be invoked with the ALT key held down. The operator must be supplied with
specific instructions Qn how to use thesekeys in a particularapplication.
The way a CURSR SEL operation
is ended depends on the host program. Each application could be different. Specific instructionsmust be supplied
for the application on whichtheoperator is working.
The PF
keys havetypamatlccapablllty. Greatcare should be exercised In usingthis capability.
. I
SYS REQ (also see Note 1)
When pressed with the ALT key held down, this key
informs the host that a test request message has
been keyed
Into the display buffer. Thisfunction is
usually invoked when the terminal may be Hpet'·
lencing problems and the operator wants the sys-
tem to perform a test of the terminal. The operator
should consult his organization's procedures for
the correct use of this key. -....._......,
ATTN
SYS
..............
.......
l"'REQ
CURSRBLINK
.......
------
Pressing this key the first time cau- the cursorto
·-
blink. Pressing the keyagaincausestheblinkingto
stop. ,
CUSOR
BLINK
ALT
CURSR
D-1?
ID!._NT.
7
ALTCURSR
I
,1
Activation of this key changes the type of cursor. /
::::::~:: v:!'."' changed to a rectangular////
Print Operation
Pressing the print keycauses the information on the screen to be
printed on the printer attached to the terminal. If the printer
buffer is not full, the display buffer will be copied to a printer
buffer. The keyboard
is disabled during this copy, but is re-
anabled again as soon as the copy is completed. This should
not takevery long. If theprinter is alreadyprintingdatatransmit-
ted from the host, the display screen wlll be printed as soon as
the previous operation is completed. H the printerbuffer Is full,
the display buffer cannot be copied and the keyboard is disab-
led. Theoperatorcan
-11 forthecurrent print to complete. The
print request will then be started or the operator can cancel the
current print operation by simultaneouslypntSSlng ALT and DEV
CNCL and the print request will be _.,Iced. The keyboard will
immediately reenable, and
the operator can then do some other
operation.
IDENT
Since only oneprinterIsattachable to the0113270, the IDENTkey
is nonfunctlonal.
; I
I
I
I
I
I
I
I
r-------------------------------1
! r---~---,
r----------------------------------,
I I I I
.1
CUR SR
SEL
CLEAR
ERASE
INPUT
ERASE
EOF
~cJ)))
TEST
~
I
I
I
I
"'
I @ 1
' 1 2
Pf 1
PF2 PF3
......
a w
6} A s
<>
~
z x
RESET ~
... .......
DEVCNC~
~
- ....................
'·
$ %
....
4 5 6
PF4
PF5 PFG
E R T y
D F G
c v B
- ......
...........
& * ( )
7 B 9 0
PF7
PFB
PF9
PF10
u I 0 p
H J K L I
J
• .
N M • .
.
+
+-
-=
PF11
PF12
~
I
k-
' f:J
,,
l• j
?
<>~
/
~
"""'
@j
r---'" ENTE~
.
~1
'"!'
~
DUP
PA1
,,
'~
FIELD
MARK
PA2
...
I
.............
............
..........
I
I
SHIFT KEYS
I
'
TEST
The TEST key Is used to invoke the sett-confidence test functions
resident in the DM3270. Pressing the keyrestarts the terminal just as
if the power had been turned off and on. It terminates any print
operation, any
host communications, clears and resets the display
screenandexecutes
the self-confidencetestfunctionsthatareauto-
matically executed when the terminal is powered on. Hanyerrorsare
discovered whileexecuting the tests, error messages aredisplayed.
If no errorsare discovered, the screenremains blank. When the tests
have
been completed, the terminal resumes its normal mode of op-
eration. Any error messages will remain on the screen untilcleared
by the operator. While executing the tests, the keyboard and the
communications
port aredisabled.
..................
Theoperator can use this key tocancel the
currently printing operation.
RESET Key
The RESETkey Is used to recover from an Inhibited
keyboard operation that has resulted in a disabled
keyboard. When the keyboardIsdisabled, no other
keyboard operations are honored. The RESET key
cannot reset adisabled keyboard when the terminal
Is sending data to, or ,_r,ing data from the host.
The RESET key can also be used to terminate an
insert mode operation. See Subhead 3.3.3 for addi·
tional discussion of RESET.
I
I
I
I
ENTER (also see Note 1)
Pressing the ENTER key Informs the host
program that a message Is completed and
ready to be transmitted to the host for pro-
cessing.
NOTE 1: Program Attention Keys
These keys solicit host program action by causing an 110 pending condition to occur at thedisplayterminal. When the next poll is receivedfrom
the host,
the terminal transmits an attention code, identifying the patticular attention key that was depressed. Some data may also be
transmitted, depending on the type of attention key thatwas depressed. The host program provides its own interpretation of theattentionkeys;
therefore, the operator must be given explicit instructions concerningthe use of these keys.
The
program attentionkeys are CLEAR, ENTER, SYSRFQ, the Program Function (PF) keys and the Program Access (PA) keys. AJso, CURSR
SEL may act as an attentionkey, depending on thecontents of the displaybuffer. The operator must be givenexplicitinstructions forusing the
CUR SR SEL key in a particular application. The PF keyshave typamatic capability.
The ATTN key is provided on IBM 3276terminals for use with the SNA protocol. This key is nonfunctional on the DM3270.
~
7 8 9
PF13
PF14
PF15
4 5 6
""
~
~
PF16
PF17 PF18
1 2 3
PF19
PF20
PF21
~~,
0 .
PF23 PF24
~2
~
-
'',,
',
'
Program Access Keys (PA) (also see Note 1)
These three keys may only be Invoked with the ALT key held down.
They are also assigned functions by the host application program.
They
differ from the PF keys inthat no datacan be transmitted to the
host. Only the attention code is transmitted. The operator must be
supplied with specific instructions on how to use these keys.
Figure3-2
Keyboard
Layout and Key Description
1of2