1047:
1613:
866:
519:
1533:
807:
51:
3876:
1793:
TCP/IP servers using Telnet, and at the same time in another screen to communicate with the mainframe using native 3270. TN3270 support where the 3174 could connect to a TN3270 host/gateway, eliminating SNA, but preserving the 3270 data stream. IP forwarding allowing bridging of LAN (Token-Ring or
Ethernet) connected devices downstream to the 3174 to route IP traffic onto the Frame Relay WAN interface.
1605:
143:
776:
1330:, numbers, etc. hardwired into the terminal. The 3279G supports six additional sets of symbols each supporting 190 symbols, resulting in a total of 1.140 programmable symbols. Three of the Programmable Symbols sets have three planes each enabling coloring (red, blue, green) the Programmable Symbols downloaded to those sets, thereby supporting a total of seven colors.
1046:
1523:
terminal or printer. Up to three additional adapters, each supporting two coax devices, could be installed. The 3276 could connect to a non-SNA or SNA host using BSC or SDLC with line speed of up to 9,600 bit/s. The 3276 looked very much like the 3278 terminal, and the terminal feature of the 3276 itself, was more or less identical to those of the 3278.
1023:(SNA) protocol these terminals were logical unit type 2 (LU2). The basic models 2A and 3A used red, green for input fields, and blue and white for output fields. However, the models 2B and 3B supported seven colors, and when equipped with the optional Programmed Symbol Set feature had a loadable character set that could be used to show graphics.
3531:(WCC) optionally followed by a buffer containing orders or data (or both). The WCC controls the operation of the device. Bits may start printer operation and specify a print format. Other bit settings will sound the audible alarm if installed, unlock the keyboard to allow operator entry, or reset all the Modified Data Tags in the device buffer.
594:
controller into '3270 Character Set', and keyboard scan-codes from the terminal, read by the controller through a poll, is translated by the controller into EBCDIC. For DFT (Distributed
Function Terminal) type displays, most of the 3270 data stream is forwarded to the display by the controller. The display interprets the 3270 protocol itself.
858:
490:
compatible with the 3270 data stream terminated in the unit, but not as 'Plug compatibility' equipment, also were compatible at the coax level thereby allowing IBM terminals to be connected to a 3rd party controller or vice versa. Modern applications are sometimes built upon legacy 3270 applications, using software utilities to capture (
1588:, and others, targeted the PC market, 3270 customers got an alternative to IBM 3270 printers by connecting this type of printers through printer protocol converters from manufactures like I-data, MPI Tech, Adacom, and others. The printer protocol converters basically emulate a 3287 type printer, and later extended to support IPDS.
3782:: "Base color (four colors) can be produced on color displays and color printers from current 3270 application programs by use of combinations of the field intensify and field protection attribute bits. For more information on color, refer to IBM 3270 Information System: Color and Programmed Symbols, GA33-3056."
4872:
The IBM 3179 Color
Graphics Display Station Models G1 and G2 and the IBM 3979 Expansion Unit are the latest members of the IBM 3270 Information Display System graphics family of products. The 3179 G models are new, attractively priced, eight-color, 1,920- or 2,560-character, 14-inch CRTs with bright,
4664:
IBM announces the 3179 Color
Display Station, a new, low price, color display member of the IBM 3270 Information Display System. The 3179 is a compact, 7-color, 1920-character, 14-inch CRT with bright, clear colors and a smudge-free screen surface. It features a new, modifiable keyboard, and function
1759:
coax connector by changing the BNC connector to DPC β Dual
Purpose Connector. The DPC female connector was a few millimeters longer and with a built-in switch that detected if a normal BNC connector were connected or a newer DPC connector was connected, thereby changing the physical layer from 93 ohm
1298:
The second later implementation provided All Points
Addressable (APA) graphics, a.k.a. Vector Graphics, allowing more efficient graphics than the older technique. The first terminal to support APA / Vector graphics was the 3179G terminal that later was replaced by first the 3192G and later the 3472G.
1744:
The 3174 was designed to enhance the 3270 product line with many new connectivity options and features. Like the 3274, it was customizable, the main difference was that it used smaller (5.25-inch) diskettes than the 3274 (8-inch diskettes), and that the larger floor models had 10 slots for adapters,
1686:
3274 models included 8, 12, 16, and 32 port remote controllers and 32-port local channel attached units. In total 16 different models were over time released to the market. The 3274-1A was an SNA physical Unit type 2.0 (PU2.0), required only a single address on the channel for all 32 devices and was
1133:
The IBM 3193 Display
Station is a high-resolution, portrait-type, monochrome, 380mm (15 inch) CRT image display providing up to letter or A4 size document display capabilities in addition to alphanumeric data. Compressed images can be sent to the 3193 from a scanner and decompression is performed in
1091:
The 3180 was a monochrome display, introduced on March 20, 1984, that the user could configure for several different basic and extended display modes; all of the basic modes have a primary screen size of 24x80. Modes 2 and 2+ have a secondary size of 24x80, 3 and 3+ have a secondary size of 32x80, 4
597:
In addition to passing the 3270 data stream directly to the terminal, allowing for features like EAB β Extended
Attributes, Graphics, etc., DFT also enabled multi sessions (up to 5 simultaneous), featured in the 3290 and 3194 multisession displays. This feature was also widely used in 2nd generation
3095:
Data sent to the 3270 consist of commands, a Copy
Control Character (CCC) or Write Control Character (WCC) if appropriate, a device address for copy, orders, character data and structured fields. Commands instruct the 3270 control unit to perform some action on a specified device, such as a read or
1784:
In 1990β1991, a total of 7 more models were added: 21R, 21L, 12L, 22L, 22R, 23R, and 90R. The 12L offered ESCON fibreoptic channel attachment. The models with 2xx designation were equal to the 1xx models but repacked for rackmount and offered only 4 adapter slots. The 90R was not intended as a coax
1422:
3179-G terminals combine text and graphics as separate layers on the screen. Although the text and graphics appear combined on the screen, the text layer actually sits over the graphics layer. The text layer contains the usual 3270-style cells which display characters (letters, numbers, symbols, or
211:
In a data stream, both text and control (or formatting functions) are interspersed allowing an entire screen to be painted as a single output operation. The concept of formatting in these devices allows the screen to be divided into fields (clusters of contiguous character cells) for which numerous
2031:
On the 3275 and 3277 terminals without the a text feature, lower case characters display as uppercase. NL, EM, DUP, and FM control characters display and print as 5, 9, *, and ; characters, respectively, except by the printer when WCC or CCC bits 2 and 3 = '00'b, in which case NL and EM serve
1751:
The 01L were local channel attached, the R models remotely connected, and the x3R Token Ring (upstream) connected. The 0xL/R models were floor units supporting up to 32 coax devices through the use of internal or external multiplexers (TMA/3299). The 5xR, models were shelf units with 9 coax ports,
1694:
Enabling backward compatibility, it was possible to install coax boards, so-called 'panels', in groups of 4 or 8 supporting the now older
Category B coax devices. A maximum of 16 Category B terminals could be supported, and only 8 if the controller were fully loaded with a maximum of 4 panels each
1522:
3276 remote display with controller function. IBM 3276, announced in 1981, was a combined remote controller and display terminal, offering support for up to 8 displays, the 3276 itself included. By default, the 3276 had two type A coax ports, one for its own display, and one free for an additional
1506:
With the advent of the graphic terminal 3179G, the APL character set was expandable to 138 characters, called APL2. The added characters were: Diamond, Quad Null, Iota Underbar, Epsilon Underbar, Left Tack, Right Tack, Equal Underbar, Squished Quad, Quad Slope, and Dieresis Dot. Later APL2 symbols
1502:
keyboard, allowing the operator/programmer to enter APL symbolic instructions directly into the editor. In order to display APL symbols on the terminal, it had to be equipped with an APL character set in addition to the normal 3270-character set. The APL character set is addressed with a preceding
1439:
sends the vector definitions to the 3179-G, and the work of activating the pixels that represent the picture (the vector-to-raster conversion) is done in the terminal itself. The datastream is related to the number of graphics primitives (lines, arcs, and so on) in the picture. Arcs are split into
212:
field attributes, e.g., color, highlighting, character set, protection from modification, can be set. A field attribute occupies a physical location on the screen that also determines the beginning and end of a field. There are also character attributes associated with individual screen locations.
3862:
Data Description D3 WCC 11 5C F0 SBA Row 24 Column 1 1D F0 SF/Attribute 6E 40 '> ' 1D 40 SF/Attribute SBA is not required here since this is being written at the current buffer position 13 IC β cursor displays at current
3858:
The following data stream writes an attribute in row 24, column 1, writes the (protected) characters '> ' in row 24, columns 2 and 3, and creates an unprotected field on row 24 from columns 5-79. Because the buffer wraps around an attribute is placed on row 24, column 80 to terminate the input
1690:
The 3274 controllers introduced a new generation of the coax protocol, named Category A, to differentiate them from the Category B coax devices, such as the 3277 terminal and the 3284 printer. The first Category A coax devices were the 3278 and the first color terminal, the IBM 3279 Color Display
1337:
If one for example wishes to draw a hyperbola on the screen, the application must first compute the required Programmable Symbols to make up hyperbola and load them to the terminal. The next step is then for the application to paint the screen by addressing the screen cell position and select the
3849:
Addresses are encoded within orders in two bytes. For twelve bit addresses the high order two bits of each byte are set to form valid EBCDIC (or ASCII) characters. For example, address 0 is coded as X'4040', or space-space, address 1919 is coded as X'5D7F', or '"'. Programmers hand-coding panels
3833:
3270 displays and printers have a buffer containing one byte for every screen position. For example, a 3277 model 2 featured a screen size of 24 rows of 80 columns for a buffer size of 1920 bytes. Bytes are addressed from zero to the screen size minus one, in this example 1919. "There is a fixed
1792:
The subsequent releases 2 to 6 of Configuration Support C enables support for: Split screen, Copy from session to session, Calculator function, Access to AS/400 host and 5250 keyboard emulation, Numerous APPN enhancements, TCP/IP Telnet support that allowed 3270 CUT terminals to communicate with
1763:
Configuration Support A was the first microcode offered with the 3174. It supported all the hardware modules present at the time, almost all the microcode features found in 3274 and introduced a number of new features including: Intelligent Printer Data Stream (IPDS), Multiple Logical Terminals,
1489:
The IBM 3472G announced in 1989 was the successor to 3192G and featured five concurrent sessions, one of which could be graphics. Unlike the 3192-G, it needed no expansion unit to attach a mouse or color plotter, and it could also attach a tablet device for digitised input and a bar code reader.
126:
The 3270 series was designed to connect with mainframe computers, often at a remote location, using the technology then available in the early 1970s. The main goal of the system was to maximize the number of terminals that could be used on a single mainframe. To do this, the 3270 was designed to
489:
series to have a similar block-mode capability that would transmit a screen at a time, with some form validation capability. The industry distinguished between 'System compatible controllers' and 'Plug compatibility controllers', where 'System compatibility' meant that the 3rd party system was
267:
to mainframes with 3279 screens did not meet with success because its programmers were not able to properly adapt the spreadsheet's user interface to a screen at a time rather than character at a time device. But end-user responsiveness was arguably more predictable with 3270, something users
1802:
The floor models, and the rack-mountable units, could be expanded with a range of special 3174 adapters, that by 1993 included: Channel adapter, ESCON adapter, Serial (V.24/V.35) adapter, Concurrent Communication Adapter, Coax adapter, Fiber optic "coax" adapter, Async adapter, ISDN adapter,
593:
There are two types of 3270 displays in respect to where the 3270 data stream terminates. For CUT (Control Unit Terminal) displays, the stream terminates in the display controller, the controller instructs the display to move the cursor, position a character, etc. EBCDIC is translated by the
195:
IBM 3270 devices are connected to a 3299 multiplexer or to the cluster controller, e.g., 3271, 3272, 3274, 3174, using RG-62, 93 ohm, coax cables in a point to point configuration with one dedicated cable per terminal. Data is sent with a bit rate of 2.3587 Mbit/s using a slightly modified
1788:
The line of controllers came with Configuration Support C to support ISDN, APPN and Peer Communication. The ISDN feature allowed downstream devices, typically PC's, to connect to the 3174 via the ISDN network. The APPN support enabled the 3174 to be a part of an APPN network, and the Peer
1294:
IBM had two different implementations for supporting graphics. The first was implemented in the optional Programmed Symbol Sets (PSS) of the 3278, 3279 and 3287, which became a standard feature on the later 3279-S3G, a.k.a. 3279G, and was based on piecing together graphics with on-the-fly
1926:
With the introduction of the 3174 controller internal or external multiplexers (3299) became mainstream as the 3174-1L controller was equipped with four multiplexed ports each supporting eight devices. The internal 3174 multiplexer card was named TMA β Terminal Multiplexer adapter 9176.
1937:
In some instances, the multiplexer worked as an "expansion" unit on smaller remote controllers including the 3174-81R / 91R, where the 3299 expanded the number of coax ports from four to eight, or the 3174-51R / 61R, where the 3299 expanded the number of coax ports from eight to 16.
215:
Using a technique known as read modified, a single transmission back to the mainframe can contain the changes from any number of formatted fields that have been modified, but without sending any unmodified fields or static data. This technique enhances the terminal throughput of the
1922:
IBM offered a device called 3299 that acted as a multiplexer between an accordingly configured 3274 controller, with the 9901 multiplexer feature, and up to eight displays/printers, thereby reducing the number of coax cables between the 3x74 controller and the displays/printers.
1092:
and 4+ have a secondary size of 43x80 and 5 and 5+ have a secondary size of 27x132. An application can override the primary and alternate screen sizes for the extended mode. The 3180 also supported a single explicit partition that could be reconfigured under application control.
1440:
short vectors, that are sent to the 3179-G to be drawn. The 3179-G does not store graphic data, and so cannot offload any manipulation function from GDDM. In particular, with user control, each new viewing operation means that the data has to be regenerated and retransmitted.
3834:
relationship between each ... buffer storage location and its position on the display screen." Most orders start operation at the "current" buffer address, and executing an order or writing data will update this address. The buffer address can be set directly using the
1777:
The new line of controllers came with Configuration Support B release 1, increased the number of supported DSPU on the Token-Ring gateway to 250 units, and introduced at the same time 'Group Polling' that offloaded the mainframe/VTAM polling requirement on the channel.
247:
had twelve PF keys and two PA keys. Later 3270s had an Attention key, a Cursor Select key, a System Request key, twenty-four PF keys and three PA keys. There was also a TEST REQ key. When one of these keys is pressed, it will cause its control unit to generate an I/O
412:
network or non-SNA network. If the controllers are SNA connected, they appear to SNA as PU β Physical Unit type 2.0 (PU2.1 for APPN) nodes typically with LU β Logical Unit type 1, 2, and 3 devices connected. Local, channel attached, controllers are controlled by
2027:
The 3270 displays are available with a variety of keyboards and character sets. The following table shows the 3275/3277/3284β3286 character set for US English EBCDIC (optional characters were available for US ASCII, and UK, French, German, and Italian EBCDIC).
4873:
clear colors and a smudge-resistant screen surface. Graphics capabilities are significantly enhanced by the provision of an all-points-addressable (APA) screen and the ability to natively attach the IBM Color Jetprinter (3852 Model 2) for local screen copy.
1318:
IBM 3279-S3G, a.k.a. 3279G, terminal, announced in 1979, was IBM's graphics replacement for the 3279-3B with PSS. The terminal supported 7 colors and the graphics were made up of Programmable Symbol sets loaded to the terminal by the graphical application
374:
The modified data tag is well suited to converting formatted, structured punched card input onto the 3270 display device. With the appropriate programming, any batch program that uses formatted, structured card input can be layered onto a 3270 terminal.
3773:
Bit 7 is the "Modified Data Tag", where '0' indicates that the associated field has not been modified by the operator and '1' indicates that it has been modified. As noted above, this bit can be set programmatically to cause the field to be treated as
1333:
Each 'character' cell consists of a 9x12 or a 9x16 dot matrix depending on the screen model. In order to program a cell with a symbol 18 bytes of data is needed making the data load quite heavy in some instances when compared to classic text screens.
3768:'11'B indicates that the field is non-display, non-printable, and not pen detectable. This last can be used in conjunction with the modified data tag to imbed static data on the screen that will be read each time data was read from the device.
318:
Device Independent Display Operator Console Support (DIDOCS) in Multiple Console Support (MCS) for OS/360 and successors supports 3270 devices and, in fact, MCS in current versions of MVS no longer supports line mode, 2250 and 2260 devices.
1572:
documents, using bidirectional communications between the application and the printer. IPDS support among others printing of text, fonts, images, graphics, and barcodes. The IBM 4224 is one of the IPDS capable dot matrix printers.
3099:
On a local non-SNA controller, the command is a CCW opcode rather than the first byte of the outbound display stream; on all other controllers, the command is the first byte of the display stream, exclusive of protocol headers.
1058:
unit announced March 8, 1983, capable of displaying in various modes, including four independent 3278 model 2 terminals, or a single 160Γ62 terminal; it also supports partitioning. The 3290 supports graphics through the use of
220:, and minimizes the data transmitted. Some users familiar with character interrupt-driven terminal interfaces find this technique unusual. There is also a read buffer capability that transfers the entire content of the 3270-
505:
that plugged into a PC and connected to the controller through a coaxial cable. 3270 simulators for IRMA and similar adapters typically provide file transfers between the PC and the mainframe using the same protocol as the
1770:
In 1989, IBM introduced a new range of 3174 models and changed the name from 3174 Subsystem Control Unit to 3174 Establishment Controller. The main new feature was support for an additional 32 coax port in floor models.
1431:
is used to paint each pixel in one of sixteen colors. As well as being separate layers on the screen, the text and graphics layers are sent to the display in separate data streams, making them completely independent.
200:. Cable runs of up to 1,500 m (4,900 ft) are supported, although IBM documents routinely stated the maximum supported coax cable length was 2,000 ft (610 m). Originally devices were equipped with
1745:
some of them were per default occupied by channel adapter/serial interface, coax adapter, etc. Unlike the 3274, any local models could be configured as either local SNA or local non-SNA, including PU2.1 (APPN).
256:(AID) identifying which key was pressed. Application program functions such as termination, page-up, page-down, or help can be invoked by a single key press, thereby reducing the load on very busy processors.
1190:
GTE manufactured the IS/7800 Video Display System, nominally compatible with IBM 3277 displays attached to a 3271 or 3272. An incompatibility with the RA buffer order broke the logon screen in VM/SE (SEPP).
1418:
mainframe computer terminal providing 80Γ24 or 80Γ32 characters, 16 colors, plus graphics and is the first terminal to support the APA graphics apart from the 3270 PC/G, 3270 PC/GX, PC AT/G and PC AT/GX.
3671:
Stores the character in byte 4 in all buffer locations starting at the current buffer position up to but not including the specified address and sets the current buffer position to the specified address
4859:
449:
in order for the hardware to be useful outside of the manufacturer. MTS was the default OS at Michigan for many years, and was still used at Michigan well into the 1990s. Many manufacturers, such as
3745:
Bit 3 is zero to indicate that this field, if unprotected, could accept alphanumeric input. One indicates that only numeric input is accepted, and automatically shifts to numeric for some keyboards.
1481:
successor to 3179G. It featured 16 colors, and support for printers (i.e., IBM Proprinter) for local hardcopy with graphical support, or system printer, text only, implemented as an additional LU.
4957:"Object: 11000554 IBM 3179G, producer: IBM, serial number: 55-N1186, dating: 1985-11-01β1985-11-30, received: 2009-11-18, Description: IBM 3179 β Display station (color or graphics) for IBM 3270"
1596:
In the later versions of 3174 the Asynchronous Emulation Adapter (AEA), supporting async RS-232 character-based type terminals, was enhanced to support printers equipped with a serial interface.
1341:
The 3279G could be ordered with Attribute Select Keyboard enabling the operator to select attributes, colors and Programmable Symbols sets, making that version of the terminal quite distinctive.
3850:
usually keep the table of addresses from the 3270 Component Description or the 3270 Reference Card handy. For fourteen and sixteen-bit address, the address uses contiguous bits in two bytes.
3096:
write. Orders are sent as part of the data stream to control the format of the device buffer. Structured fields are to convey additional control functions and data to or from the terminal.
371:
operating system provided support for 3270 terminals and applications, including a full-screen text editor, a menu system, and a PANEL facility to create 3270 full-screen applications.
224:
including field attributes. This is mainly used for debugging purposes to preserve the application program screen contents while replacing it, temporarily, with debugging information.
1767:
Configuration Support S, strangely following release A, introduced that a local or remote controller could act as 3270 Token-Ring DSPU Gateway, supporting up to 80 Downstream PU's.
1785:
controller, it was positioned as a Token Ring 3270 DSPU gateway. However, it did have one coax port for configuring the unit, which with a 3299 multiplexer could be expanded to 8.
4846:
4556:
5873:
3859:
field. This data stream would normally be written using an Erase/Write command which would set undefined positions on the screen to '00'x. Values are given in hexadecimal.
204:, which later was replaced with special so-called DPC β Dual Purpose Connectors supporting the IBM Shielded twisted pair cabling system without the need for so-called red
127:
minimize the amount of data transmitted, and minimize the frequency of interrupts to the mainframe. By ensuring the CPU is not interrupted at every keystroke, a 1970s-era
1100:
The IBM 3191 Display Station is an economical monochrome CRT. Models A and B are 1920 characters 12-inch CRTs. Models D, E and L are 1920 or 2560 character 14-inch CRTs.
5628:
1668:, Token Ring or Ethernet in addition to co-ax; and TN3270. They also support attachment of asynchronous ASCII terminals, printers, and plotters alongside 3270 devices.
1752:
expandable to 16, by the connection of a 3299 multiplexer. The smallest desktop units, 8xR, had 4 coax ports expandable to 8, by the connection of a 3299 multiplexer.
1443:
The 3179G is a distributed function terminal (DFT) and requires a downstream load (DSL) to load its microcode from the cluster controller's floppy disk or hard drive.
585:. Later, the 3270 PC/G (graphics), 3270 PC/GX (extended graphics), 3270 Personal Computer AT, 3270 PC AT/G (graphics) and 3270 PC AT/GX (extended graphics) followed.
4655:
1982:, Brazil as far as late 1980s, having its internals redesigned by a local engineering team using modern CMOS technology, while retaining its external look and feel.
5878:
1781:
Configuration Support B release 2 to 5, enabled features like: Local Format Storage (CICS Screen Buffer), Type Ahead, Null/Space Processing, ESCON channel support.
4225:
280:
and successor systems. IBM and third-party software that included an interactive component took for granted the presence of 3270 terminals and provided a set of
4665:
equivalent to that provided by both the IBM 3279 Models S2A and S2B....First customer shipment for the 3179 is planned for March 1984. ...Purchase...$ 2,295...
1612:
445:
One of the first groups to write and provide operating system support for the 3270 and its early predecessors was the University of Michigan, who created the
4985:
Pansopic Systems, Inc has announced that Gener/O1, its online program development system for IBM's CICS, now supports IBM's 3179 Model G graphics terminal...
4338:
3108:
The following table includes datastream commands and CCW opcodes for local non-SNA controllers; it does not include CCW opcodes for local SNA controllers.
5019:
4867:
5589:
4458:
5821:
4186:
1070:
The 3290 is a Distributed Function Terminal (DFT) and requires that the controller do a downstream load (DSL) of microcode from floppy or hard disk.
3846:. For a device with a 1920 character display a twelve bit address is sufficient. Later 3270s with larger screen sizes use fourteen or sixteen bits.
414:
4617:
1760:
unbalanced coax, to 150 ohm balanced twisted-pair, thereby directly supporting the IBM Cabling system without the need for a so-called red balun.
1591:
The IBM 3482 terminal, announced in 1992, offered a printer port, which could be used for host addressable printing as well as local screen copy.
3906:
Most 3270 terminals newer than the 3275, 3277, 3284 and 3286 support an extended data stream (EDS) that allows many new capabilities, including:
4974:
4642:
1930:
A number of vendors manufactured 3270 multiplexers before and alongside IBM including Fibronics and Adacom offering multiplexers that supported
1230:
manufactured a special version of their model 270 terminal that was compatible with IBM 3270 and its associated coax port to connect to a 3x74.
1789:
Communication allowed coax attached PC's with 'Peer Communication Support' to access resources on the Token-Ring network attached to the 3174.
5807:
5680:
5863:
5047:
1866:
An alternative implementation of an establishment controller exists in form of OEC (Open Establishment Controller). It's a combination of an
4319:
1649:, sometimes followed by a release number, to designate a list of features together with the hardware and microcode needed to support them.
4508:
5565:
5549:
5533:
5514:
5498:
4478:
824:
Extended Highlighting: ability to set highlighting attributes on individual characters as well as on fields. For the 3278 that includes:
158:(the 3275 and 3276 included an integrated control unit). Originally devices were connected to the control unit over coaxial cable; later
5641:
1565:
526:
The IBM 3270 display terminal subsystem consists of displays, printers and controllers. Optional features for the 3275 and 3277 are the
4569:
4391:
4026:
controller, it initiates a Read Modied or Short AID data transfer. For BSC controllers it causes a positive response to the next poll.
538:
was available and will lock the keyboard if the operator attempts to enter non-numeric data into a field defined as numeric. Later an
422:
5615:
382:
office productivity software enjoyed great success with 3270 interaction because of its design understanding. And for many years the
5061:
4425:
1628:
4921:...The firm also introduced an option that supports attachment of IBM's 3179G Graphic Display Station to a series 274 controller...
4599:
3802:
to add support for seven colors, blinking, reverse video, underscoring, field outlining, field validation, and programmed symbols.
877:
was IBM's first color terminal. IBM initially announced four models, and later added a fifth model for use as a processor console.
4365:
1687:
not compatible with the 3272. The 3274-1B and 3274-1D were compatible with the 3272 and were referred to as local non-SNA models.
5858:
5654:
5114:
5050:, Ch. 1. Introducing the 3174 Establishment Controller - Figure 1-1 Overview of the IBM 3174 Establishment Controller Attachment.
2271:
197:
5278:
5262:
1679:
Where the features of the 3271β2 was hardcoded, the 3274 was controlled by its microcode that was read from the 3274's built-in
5868:
5848:
4677:
4036:
2014:
clients cannot be used as a substitute for tn3270 clients, as they use fundamentally different techniques for exchanging data.
3691:
Fills all unprotected fields with nulls starting at the current buffer position up to but not including the specified address
1796:
In 1993, three new models were added with the announcement of Ethernet Adapter (FC 3045). The models were: 14R, 24R, and 64R.
4324:
2354:
1569:
1436:
1320:
1303:
1027:
605:
The MLT β Multiple Logical Terminals feature of the 3174 controller also enabled multiple sessions from a CUT type terminal.
4789:
2247:
1970:, UK, laboratory. The subsystem products were manufactured in Kingston (displays and controllers), Endicott (printers), and
1897:
Memorex had two controllers for its 3277-compatible 1377; the 1371 for remote connection and the 1372 for local connection.
1121:
Model L provides a green monochrome 15 inch CRT with 80x24, 80x32, 80x44 or 132x27 characters with a selector pen capability
5602:
1974:, Scotland, UK, (most products) and shipped to users in U.S. and worldwide. 3278 terminals continued to be manufactured in
1806:
In 1994, IBM incorporated the functions of RPQ 8Q0935 into Configuration Support-C release 3, including the TN3270 client.
2330:
1878:
1632:
1016:
290:
4764:
4229:
1998:
protocol and the software that emulates a 3270 class terminal that communicates using that process. tn3270 allows a 3270
1015:. Terminals could be connected to a 3274 controller, either channel connected to an IBM mainframe or linked via an SDLC (
5853:
5121:
4698:
4023:
3818:
and later models allowed attributes on individual characters in a field to override the corresponding field attributes.
1020:
409:
357:(CICS) has support for 3270 panels. Indeed, from the early 1970s on, CICS applications were often written for the 3270.
5667:
2007:
1227:
89:
1199:
Harris manufactured the 8000 Series Terminal Systems, compatible with IBM 3277 displays attached to a 3271 or 3272.
1499:
2175:
865:
4719:
3825:
text editor) to assign any font (including the programmable fonts), colour, etc. to any character on the screen.
284:
110:
IBM no longer manufactures 3270 terminals, but the IBM 3270 protocol is still commonly used via TN3270 clients,
5027:
1447:
446:
5032:
IBM 3179G graphics coordinates divide the Reflection window into 384 vertical units and 720 horizontal units.
4910:
4886:
3516:
For remote 3270s non-significant bits are set so that the command forms a valid EBCDIC (or ASCII) character.
2278:
2209:
2161:
2111:
2104:
2003:
563:
217:
188:
63:
4208:
4081:
Although the 3290 supports up to 16 explicit partitions, the ISPF SPLIT and SPLITV commands only support 4.
1134:
the 3193. Image data compression is a technique to save transmission time and reduce storage requirements.
4934:
4194:
1011:
terminal before PCs became commonly used for the purpose. It was part of the 3270 series, using the 3270
2168:
2118:
518:
348:
337:
308:
294:
82:
display terminal. Due to the text color on the original models, these terminals are informally known as
42:
2346:
1764:
Country Extended Code Page (CECP), Response Time Monitor, and Token Ring configured as host interface.
5214:
1652:
By 1994 the 3174 Establishment Controller supported features such as attachment to multiple hosts via
263:-like behavior, responding to individual keystrokes, was not possible. For the same reason, a port of
5796:
5768:
5740:
5712:
4625:
4013:
Pressing Cursoe Select has the same effect as clicking a Selector Pen at the current cursor location.
3957:
3727:
The original 3277 and 3275 displays used an 8-bit field attribute byte of which five bits were used.
2363:
543:
478:
1115:
Model F provides a 7-color high-resolution 14 inch CRT with 80x24, 80x32, 80x44 or 132x27 characters
276:
Following its introduction the 3270 and compatibles were by far the most commonly used terminals on
2575:
2183:
1963:
1035:
418:
304:
1885:
system. OEC allows to connect a 3270 display to IBM mainframes via TN3270 or to other systems via
4760:
3822:
2229:
2128:
1955:
1947:
1680:
84:
2238:
3539:
Orders consist of the order code byte followed by zero to three bytes of variable information.
311:
has line mode command line support and also has facilities for full screen applications, e.g.,
4486:
4421:
3731:
Bits 0 and 1 are set so that the attribute will always be a valid EBCDIC (or ASCII) character.
2540:
2474:
2295:
1999:
1532:
806:
582:
67:
2221:
1112:
Model D provides a green monochrome 15 inch CRT with 80x24, 80x32, 80x44 or 132x27 characters
980:
In extended color mode the color field and character attributes determine the color as one of
114:
or web interfaces to access mainframe-based applications, which are sometimes referred to as
5786:
5758:
5730:
5702:
5088:
4938:
2416:
2315:
1819:
The GTE IS/7800 Video Display Systems used one of two nominally IBM compatible controllers:
1124:
Model W provides a black and while 15 inch CRT with 80x24, 80x32, 80x44 or 132x27 characters
361:
260:
5007:
2. Native Vector Graphics β introduced with the 3179G and also used by the 3192G and 3472G.
4573:
50:
5140:
4516:(Seventh ed.), International Business Machines Corporation, October 1974, GC20-1810-6
2376:
1958:, laboratory. As the subsystem expanded, the 3276 display-controller was developed by the
1455:
466:
454:
142:
5070:
3863:
position: Row 24, column 5 11 5D 7F SBA Row 24 Column 80 1D F0 SF/Attribute
3592:
Indicates the start of a field at the current buffer position and provides its attribute
1741:
IBM introduced the 3174 Subsystem Control Unit in 1986, replacing the 3274 product line.
5682:
IBM 3270 Information Display System 3274 Control Unit Description and Programmer's Guide
4603:
3651:
Advances the current buffer address to the first position of the next unprotected field
3527:
The data sent by Write or Erase/Write consists of the command code itself followed by a
1286:
introduced the Dataspeed 40 terminal/controller, compatible with the IBM 3275, in 1980.
2411:
2097:
1975:
1951:
1577:
1519:
3275 remote display with controller function (no additional displays up to one printer)
1307:
1202:
Harris later manufactured the 9100β9200 Information Processing Systems, which included
1153:
Model D provides a 15-inch monochrome CRT with 80x24, 80x31, 80x44 or 132x27 characters
1055:
554:
Generally, 3277 models allow only upper-case input, except for the mixed EBCDIC/APL or
502:
397:
393:
277:
4942:
4860:"IBM 3179 Color Graphics Display Station Models G1 and G2 and IBM 3979 Expansion Unit"
3875:
1676:
IBM introduced the 3274 controller family in 1977, replacing the 3271β2 product line.
386:
calendar was the most commonly displayed screen on office terminals around the world.
5842:
4979:
4915:
4274:
3951:
3938:
1874:
1756:
1142:
The IBM 3194 is a Display Station that features a 1.44 MB 3.5" floppy drive and
1008:
906:
In base color mode the protection and intensity field attributes determine the color:
841:
Programmed Symbols {PS): programmable characters; able to display monochrome graphics
599:
491:
221:
201:
146:
Sample IBM 3270 cluster with one control unit connected to a printer and two displays
111:
104:
75:
4323: prior to 1 November 2008 and incorporated under the "relicensing" terms of the
2010:
network. Telnet 3270 can be used for either terminal or print connections. Standard
1900:
Later Memorex offered a series of controllers compatible with the IBM 3274 and 3174
1446:
The G10 model is a standard 122-key typewriter keyboard, while the G20 model offers
4956:
3225:
Erase device buffer, set alternate size, then write WCC folloed by orders and data
2494:
2426:
1959:
1931:
1665:
1604:
1327:
1326:
Programmable Symbols is an addition to the normal base character set consisting of
379:
232:
163:
93:
1627:
3274 cluster controller (different models could be channel-attached or remote via
1156:
Model H provides a 14-inch color CRT with 80x24, 80x31, 80x44 or 132x27 characters
4998:
4415:
4269:
845:
The 3278, along with the 3279 color display and the 3287 printer, introduced the
5799:
5780:
5771:
5752:
5743:
5724:
5715:
5696:
5425:, p. 1-71, Select Read Modified from Position (RMP) Command (3274 D Units).
4527:
2595:
2580:
1994:
describes both the process of sending and receiving 3270 data streams using the
1967:
1581:
1423:
invisible control characters). The graphics layer is an area of 720Γ384 pixels.
1031:
1012:
775:
578:
507:
417:. Remote controllers are controlled by the NCP β Network Control Program in the
390:
344:
329:
264:
175:
132:
100:
31:
1063:. A 3290 application can divide its screen area up into as many as 16 separate
5401:, p. 1-72, Select Read Buffer from Position (RBP) Command (3274 D Units).
4769:
3947:
2590:
2535:
1653:
1585:
1451:
498:
497:
In the early 1990s a popular solution to link PCs with the mainframes was the
159:
5224:. COMMUNICATIONS GROUP MEMOREX CORPORATION. September 28, 1978. MRX 19780928.
4818:
17:
5194:
4891:
4060:
2436:
2406:
1946:
The IBM 3270 display terminal subsystem was designed and developed by IBM's
1664:
in addition to the standard channel attach or SDLC; terminal attachment via
768:
458:
249:
96:
4770:"IBM 3270 compatible terminal playing Infocom games (Informer 207 376/SNA)"
4740:
1934:
as an alternative to coax, and fiber-optic links between the multiplexers.
5827:
3758:'01'B indicates that the field is displayable and selector-pen detectable.
3165:
Copy from one device buffer to another, e.g., from a display to a printer
1507:
were supported by 3191 Models D, E, L, the CUT version of 3192, and 3472.
1143:
485:
created 3270 compatible terminals, or adapted ASCII terminals such as the
5129:. Redbooks. IBM. June 1994. pp. 269β272 (298β in PDF). GG24-4172-00.
3943:
3815:
3811:
3795:
3791:
3285:
Read AID, cursor and, except for short read, modified fields from device
2469:
1979:
1971:
1657:
1554:
1463:
1459:
1167:
790:
559:
474:
434:
430:
426:
368:
167:
128:
79:
5174:
1732:
Dual Logic (the feature of having two sessions from a CUT mode display).
5154:
4897:
emulates an IBM 3179G display terminal and allows Sun workstation users
4774:
1870:
1867:
1498:
Most IBM terminals, starting with the 3277, could be delivered with an
1283:
486:
482:
462:
364:
have support for 3270, including support for full-screen applications.
5832:
3991:
When the Structured Field and Attribute Processing Option is available
1835:
The Harris 8000 Series Terminal Systems used one of four controllers:
1774:
The models included: 11L, 11R, 12R, 13R, 61R, 62R, 63R, 91R, and 92R.
1182:
Several third-party manufacturers produced 3270 displays besides IBM.
5791:
5763:
5735:
5707:
5199:
5179:
5159:
4745:
2194:
2011:
1995:
1748:
The models included: 01L, 01R, 02R, 03R, 51R, 52R, 53R, 81R and 82R.
1698:
During its life span, the 3274 supported several features including:
1118:
Model G provides a 7-color 14 inch CRT with 80x24 or 80x32 characters
1109:
Model C provides a 7-color 14 inch CRT with 80x24 or 80x32 characters
869:
An Informatics General computer programmer using an IBM 3279 terminal
764:
574:
531:
470:
35:
5279:
Figure 9-8. English (U.S.) I/O Interface Code (3277, 3286, and 3287)
4063:, but only allows selecting a field rather than requesting movement.
3751:'00'B indicate that the field is displayed on the screen and is not
3325:
Transfer data from device to control unit with channel disconnected
1755:
In the 3174 controller line IBM also slightly altered the classical
857:
103:, and uses a high speed proprietary communications interface, using
1803:
Token-Ring adapter, Ethernet adapter, and line encryption adapter.
1150:
Model C provides a 12-inch color CRT with 80x24 or 80x32 characters
534:
character set, an audible alarm, and a keylock for the keyboard. A
27:
Family of block-oriented display terminals and printers made by IBM
5656:
3270 Information Display System Data Stream Programmer's Reference
5630:
IBM 3270 Information Display System β Color and Programmed Symbols
5591:
An Introduction to the IBM 3270 Information Systems Display System
5525:
5523:
5063:
3174 Establishment Controller/Networking Server Installation Guide
1886:
1882:
1611:
1603:
1531:
1045:
864:
856:
805:
774:
517:
383:
341:
205:
183:
141:
49:
5413:, p. 1-71, Select Read Modified (RM) Command (3274 D Units).
2600:
5580:, pp. D-1βD-2, Appendix D. 12-, 14-, and 16-Bit Addressing.
3611:
Specifies a buffer address to become the current buffer position
3305:
Read AID, cursor and modified fields from device; no short read
2520:
2484:
2401:
1661:
1306:β Graphical Data Display Manager first released in 1979, and by
1007:
The 3279 was introduced in 1979. The 3279 was widely used as an
494:) screens and transfer the data to web pages or GUI interfaces.
354:
323:
312:
298:
281:
136:
5389:, p. 1-71, Select Read Buffer (RB) Command (3274 D Units).
3205:
Erase device buffer, then write WCC folloed by orders and data
789:
3278 models 1β5: next-generation, with accented characters and
4396:
4370:
4343:
4314:
3870:
1635:
communication lines, and had between eight and 32 co-ax ports)
1415:
1368:
450:
333:
71:
4600:"Hardware Products Developed at Hursley (IBM Hursley Museum)"
1510:
Please note that IBM's version's of APL also is called APL2.
5089:"Inside an IBM/Motorola mainframe controller chip from 1981"
2545:
2530:
2421:
1338:
appropriate symbol in one of the Programmable Symbols sets.
558:
keyboards, which have lower case. Lower-case capability and
5669:
IBM 3270 Information Display System Character Set Reference
1966:; and the 3279 color display and 3287 color printer by the
3185:
Erase all unprotected fields and reset modified data tags
890:
model 2C: 80-24 base color (console) with 4 lines reserved
235:, and a 78 key version with twelve. Both versions had two
5604:
IBM 3270 Information Display System: Maintenance Handbook
5115:"Ch. 9. 3174 TCP/IP Enhancements RPQ 8Q1041 β 9.7 TN3270"
4460:
IBM 3270 Information Display System Component Description
4047:
Some, such as the GTE IS/7800, were not fully compatible.
3431:
May only be chained to a Write or Write Structured Field
3070:
3065:
3060:
3055:
3050:
3045:
3040:
3035:
3030:
3025:
3003:
2998:
2993:
2988:
2983:
2978:
2973:
2968:
2942:
2937:
2932:
2927:
2922:
2917:
2912:
2907:
2902:
2878:
2873:
2868:
2863:
2858:
2853:
2848:
2843:
2838:
2777:
2772:
2767:
2762:
2757:
2752:
2747:
2742:
2716:
2711:
2706:
2701:
2696:
2691:
2686:
2681:
2676:
2652:
2647:
2642:
2637:
2632:
2627:
2622:
2617:
2612:
2464:
1889:. Currently only CUT but not DFT displays are supported.
1799:
This was also IBM's final hardware announcement of 3174.
570:); these were added to the later 3278 & 3279 models.
340:(ISPF/PDF was available for VM, but little used) and the
4983:. Vol. 19, no. 28. July 15, 1985. p. 62.
2585:
2525:
2479:
2459:
760:
3277 model 2: 80Γ24 terminal, the biggest success of all
182:
control unit is connected to a communications line by a
5824:
noting the unveiling of the 3270 display system in 1971
4510:
IBM Virtual Machine Facility/370: Terminal User's Guide
3887:
3734:
Bit 2 is zero to indicate that the associated field is
1082:
3179: low cost color terminal announced March 20, 1984.
154:, with one or more displays or printers connected to a
99:
required by transferring large blocks of data known as
2269:
1954:
in the mid-1990s). The printers were developed by the
135:
was able to support up to 17,500 3270 terminals under
5461:, p. 1-73, Sense ID Command (3274 Band D Units).
4300:
2034:
3634:
Positions the cursor at the current buffer position
1553:
3268-1 R-loop connected stand-alone printer for the
542:
was added which could read information encoded on a
5305:, p. 3-7, Erase All Unprotected (EAU) Command.
3765:(bright), displayable, and selector-pen detectable.
3002:
2997:
2992:
2987:
2982:
2977:
2972:
2967:
2941:
2936:
2931:
2926:
2921:
2916:
2911:
2906:
2901:
2877:
2872:
2867:
2862:
2857:
2852:
2847:
2842:
2837:
1400:
1389:
1374:
1364:
1354:
1295:custom-defined symbols downloaded to the terminal.
1054:The 3290 Information Panel a 17", amber monochrome
5449:, p. 1-73, Sense Command (3274 Band D Units).
5437:, p. 1-72, Select WRT Command (3274 D Units).
5263:Figure 9-1. Control Character Assignments (EBCDIC)
4376:There are two ... , read buffer and read modified.
4252:
4250:
351:through z/VM make extensive use of 3270 features.
227:Early 3270s offered three types of keyboards. The
5649:(23rd ed.). IBM. October 1988. GA27-2739-22.
5215:"1371/1372 REMOTE/LOCAL CONTROLLER BUSINESS PLAN"
4720:"Harris 9100/9200 Information Processing Systems"
4022:For local non-SNA controllers. If attached to an
2776:
2771:
2766:
2761:
2756:
2751:
2746:
2741:
2715:
2710:
2705:
2700:
2695:
2690:
2685:
2680:
2675:
2651:
2646:
2641:
2636:
2631:
2626:
2621:
2616:
2611:
2352:
1711:V.24 interfaces with speed up to 14.4 kbit/s
1166:3104: low-cost R-loop connected terminal for the
1026:The IBM 3279 with its graphics software support,
5662:(5th ed.). IBM. December 1988. GA23-0059-4.
5365:, pp. 3-13β3-14, Read Modified All Command.
4288:
4004:attention signal even if the keyboard is locked.
3265:Read entire device buffer, including attributes
2328:
1245:Documentation for the following is available at
5675:(10th ed.). IBM. April 1987. GA27 -2837-9.
5024:Reflection for IBM 14.x β Programming Reference
1714:V.35 interfaces with speed up to 56 kbit/s
802:model 2A: 80x24 (console) with 4 lines reserved
415:VTAM β Virtual Telecommunications Access Method
5485:, p. 3-7, Write Structured Field Command.
5377:, p. 1-70, Select Command (3274 B Units).
5274:
5258:
5246:
2539:
2473:
74:in 1971 and normally used to communicate with
5688:(3rd ed.). IBM. March 1985. GA23-0061-2.
5499:Ch. 4. 3270 Data Stream Orders and Attributes
5329:, p. 3-6, Erase/Write Alternate Command.
5101:
5043:
4638:
4313:This article is based on material taken from
4170:
2458:
2415:
2313:
2159:
2102:
8:
5643:3270 Information Display System Introduction
5617:3174 Establishment Controller β Introduction
5577:
5561:
5545:
5529:
5510:
5494:
5482:
5470:
5458:
5446:
5434:
5422:
5410:
5398:
5386:
5374:
5362:
5353:, pp. 3-12β3-13, Read Modified Command.
5350:
5338:
5326:
5314:
5302:
5290:
4887:"Sun Software Emulates IBM Display Terminal"
4866:. June 18, 1985. LTR 185-076. Archived from
4624:. March 8, 1983. LTR 183-033. Archived from
4586:
4105:
4103:
4101:
3451:Retrieve error information after unit check
2191:
1349:
4975:"Software & Services:Productivity Aids"
4452:
4450:
4448:
4446:
4444:
4442:
4440:
4417:Designing and Programming CICS Applications
4386:
4384:
4209:"What is 3270 (Information Display System)"
3910:Display buffers larger than 4096 characters
2599:
2410:
41:"3270" redirects here. For other uses, see
5341:, pp. 3-11β3-12, Read Buffer Command.
5293:, p. 1-14, Figure 1-8. Command Codes.
5141:"Building an IBM 3270 terminal controller"
4849:, Chapter 7 Programmed Symbols Capability.
4842:
4552:
3987:
3985:
3983:
3981:
3979:
3977:
3975:
3973:
2584:
2544:
2425:
2206:
2109:
1576:With the emergence of printers, including
1348:
607:
581:, released in October 1983, includes 3270
5790:
5762:
5734:
5706:
4895:. Vol. 10, no. 25. p. 11.
4242:IBM stopped manufacturing .. the IBM 3270
3716:
2529:
2493:
2032:their control function and do not print.
849:(EDS) as the framework for new features.
192:, with multiple control units on a line.
186:. Remote 3270 controllers are frequently
131:mainframe fitted with only 16 MB of
5835:: A TTF remake of the font from the 3270
4127:Only available on 3274 D models and 3174
4123:
4121:
4119:
4117:
4115:
3913:Additional field attributes, e.g., color
3711:
3702:The 3270 has three kinds of attributes:
3541:
3110:
3064:
3059:
3039:
2594:
2579:
2463:
2116:
1950:, laboratory (which later closed during
1723:DSL β Downstream load for 3290 and 3179G
1642:On the 3274 and 3174, IBM used the term
911:
810:IBM 3278 and 3279 terminals side-to-side
771:4013 or 4015 graphic screen (monochrome)
400:was designed for the 3270 architecture.
4919:. Vol. 4, no. 7. p. 27.
4193:. IBM. January 23, 2003. Archived from
4163:
3969:
3738:(operator could enter data) or one for
3245:May be used to retrieve pending status
3069:
3049:
3044:
3024:
2589:
2519:
2361:
297:has support for the 3270 continuing to
231:came in both a 66 key version, with no
5879:Computer-related introductions in 1971
4432:DFHPA1 is Program Attention (PA) Key 1
4213:3270 .. over its predecessor, the 2260
4091:
4089:
4087:
4055:
4053:
3614:
3491:Write WCC followed by orders and data
3054:
3034:
3029:
2478:
2435:
2420:
2405:
2400:
1566:IPDS β Intelligent Printer Data Stream
1323:using Write Structured Field command.
1302:Both implementations are supported by
1239:Memorex 1377, compatible with IBM 3277
243:had five PF keys and two PA keys. The
174:control unit attaches directly to the
5874:History of humanβcomputer interaction
4699:"Harris 8000 Series Terminal Systems"
4181:
4179:
3928:All Points Addressable (APA) graphics
3706:
3471:Retrieve control unit identification
3119:
2534:
2483:
2468:
1616:IBM 3274-41D controller with terminal
1547:3287 printer, including a color model
1321:GDDM β Graphical Data Display Manager
819:model 5: 132Γ27 or 80Γ24 (switchable)
259:A downside to this approach was that
7:
5234:
4320:Free On-line Dictionary of Computing
4256:
2498:
2293:
1570:AFP β Advanced Function Presentation
1450:on the same layout. Compatible with
1396: (equivalent to $ 6,731 in 2023)
816:model 4: 80Γ43 or 80x24 (switchable)
813:model 3: 80Γ32 or 80x24 (switchable)
252:to the host computer and present an
78:. The 3270 was the successor to the
5636:. IBM. September 1979. GA33-3056-0.
5610:. IBM. September 1980. S229-7037-4.
5317:, p. 3-6, Erase/Write Command.
4961:Danish Data Historical Society Wiki
4935:"IBM 3179G: To beep or not to beep"
4678:"GTE IS/7800 Video Display Systems"
4109:Not available on 3271, 3272 or 3275
3916:Character attributes within a field
3821:This allowed programs (such as the
3409:Select Read Modified from Position
3369:may only be chained to Read Buffer
3347:may only be chained to Read Buffer
2276:
1720:DFT β Distributed Function Terminal
540:Operator Identification Card Reader
355:Customer Information Control System
92:, the 3270 minimizes the number of
4933:Ken Hornstein (January 10, 1991).
4790:"3270 Plug-Compatible Peripherals"
4729:. Datapro. July 1985. C25-468-101.
4708:. Datapro. July 1985. C25-468-101.
4572:. January 23, 2003. Archived from
3761:'10'B indicates that the field is
3677:Erase Unprotected to Address (EUA)
2574:
2524:
2373:
1503:Graphic Escape X'08' instruction.
25:
5808:"Telnet and TN3270 Configuration"
5779:Yevstifeyev, Mykyta (June 2011).
4687:. Datapro. May 1977. C25-457-103.
4226:"Cleo 3270 Support Documentation"
4037:Hardware Management Console (HMC)
3922:Querying terminal characteristics
3367:Select Read Buffer from Position;
2095:
1695:supporting 8 Category A devices.
410:SNA β System Network Architecture
408:3270 devices can be a part of an
4656:"IBM 3179 COLOR DISPLAY STATION"
3874:
2499:
1079:3178: lower cost terminal (1983)
198:differential Manchester encoding
5623:. IBM. April 1989. GA27-3850-0.
5222:Memorex History and Memorabilia
4909:Jim Brown (February 16, 1987).
4885:Mark Stephens (June 20, 1988).
4662:. March 20, 1984. LTR 184-039.
3946:display terminal subsystem for
3748:Bit 4 and 5 operate in tandem:
3582:
2036:3270 Character Set (US EBCDIC)
1414:announced June 18, 1985, is an
1360:IBM 3179G Color Display Station
1310:with their SAS/GRAPH software.
861:IBM 3279 Color Display Terminal
4366:"Reading from a 3270 terminal"
4349:.. reads a 3270 screen with a
1845:8181 (remote, 3271 equivalent)
1839:8171 (remote, 3271 equivalent)
1823:7801 (remote, 3271 equivalent)
1032:Hursley Development Laboratory
1030:(GDDM), was designed at IBM's
1028:Graphical Data Display Manager
896:model 3B: 80-32 extended color
887:model 2B: 80-24 extended color
793:in countries that needed them
170:connections were available. A
1:
5597:. IBM. May 1971. GA27-2739-1.
5473:, p. 3-5, Write Command.
5123:Using 3174 in TCP/IP Networks
1848:8182 (local, 3277 equivalent)
1842:8172 (local, 3277 equivalent)
1826:7802 (local, 3277 equivalent)
1017:Synchronous Data Link Control
291:Conversational Monitor System
233:programmed function (PF) keys
5864:Systems Network Architecture
5828:3270 Data Stream Programming
5723:Penner, Jon (January 1994).
5695:Rekhter, J. (January 1988).
5020:"3179G graphics coordinates"
4618:"IBM 3290 Information Panel"
4392:"Input from a 3270 terminal"
4278:. May 13, 1985. p. 103.
2343:
2244:
2235:
2226:
2219:
2180:
2173:
2166:
2125:
1932:TTP β Telephone Twisted Pair
1021:Systems Network Architecture
757:3277 model 1: 40Γ12 terminal
325:Program Development Facility
5087:Shirriff, Ken (July 2024).
4997:Greg Price (January 2008).
4911:"Telex beefs up its lineup"
3919:Redefining display geometry
1708:Programmed Symbol Set (PSS)
1475:The IBM 3192G, announced in
1228:Informer Computer Terminals
767:I/O, often used to drive a
662:3192 β Models C, D, F, L, W
90:character-oriented terminal
5895:
4559:, Ch. 3. Color Capability.
4420:. "O'Reilly Media, Inc.".
4402:PA (Program Attention) key
4139:Start Field Extended (SFE)
3551:Hexadecimal code (EBCDIC)
1274:Alfaskop Display Unit 4112
1271:Alfaskop Display Unit 4110
893:model 3A: 80-32 base color
884:model 2A: 80-24 base color
40:
29:
5751:Kelly, Bill (June 1998).
5698:Telnet 3270 Regime Option
5550:Extended Field Attributes
4301:3270 Maintenance Handbook
3838:order, often followed by
3553:
3550:
3547:
3515:
3145:
3143:
3140:
3137:
3132:
3130:
3125:
3122:
3116:
1726:9901 and 3299 multiplexer
287:and supporting programs.
245:operator console keyboard
178:of a nearby mainframe. A
116:green screen applications
5726:TN3270 Current Practices
5060:IBM Corporation (1994).
4862:. Announcement Letters.
4658:. Announcement Letters.
4620:. Announcement letters.
4457:IBM Corporation (1972).
4339:"Formatted screen input"
3836:Set Buffer Address (SBA)
3597:Set Buffer Address (SBA)
1241:Attaches to 1371 or 1372
763:3277 GA: a 3277 with an
447:Michigan Terminal System
30:Not to be confused with
5859:Block-oriented terminal
5782:The 'tn3270' URI Scheme
4819:"Computer II Reference"
4797:Communications Products
4741:"Charcole/Zmachine3270"
4327:, version 1.3 or later.
3753:selector-pen detectable
3529:Write Control Character
3523:Write control character
3511:Write Structured Field
3496:Write Structured Field
1962:, Japan, and later the
1881:program that runs on a
1717:X.25 network attachment
1638:3174 cluster controller
1568:for online printing of
847:Extended Display Stream
600:3270 terminal emulation
568:Request Price Quotation
522:IBM selector-pen in use
112:3270 terminal emulation
5869:Multimodal interaction
5849:IBM computer terminals
5497:, pp. 44-1β4-28,
5030:on December 10, 2017.
4643:3290 Information Panel
4641:, pp. 3-10β3-11,
4628:on September 18, 2020.
4414:John Horswill (2000).
4072:Models 2B and 3B only.
3925:Programmed Symbol Sets
3798:and later models used
3656:Repeat to Address (RA)
3210:Erase/Write Alternate
3170:Erase All Unprotected
3084:
3082:
3080:
3078:
3076:
3074:
3017:
3015:
3013:
3011:
3009:
3007:
2965:
2963:
2956:
2954:
2952:
2950:
2948:
2946:
2899:
2892:
2890:
2888:
2886:
2884:
2882:
2835:
2828:
2826:
2824:
2822:
2820:
2818:
2816:
2814:
2812:
2810:
2808:
2806:
2804:
2802:
2800:
2798:
2791:
2789:
2787:
2785:
2783:
2781:
2739:
2737:
2730:
2728:
2726:
2724:
2722:
2720:
2673:
2666:
2664:
2662:
2660:
2658:
2656:
2609:
2572:
2570:
2568:
2566:
2564:
2562:
2560:
2558:
2556:
2554:
2517:
2515:
2513:
2511:
2509:
2507:
2505:
2503:
2456:
2454:
2452:
2450:
2448:
2446:
2444:
2442:
2440:
2398:
2396:
2394:
2392:
2390:
2388:
2386:
2384:
2382:
2359:
2341:
2339:
2337:
2335:
2326:
2324:
2322:
2320:
2311:
2309:
2302:
2300:
2291:
2289:
2287:
2285:
2283:
2267:
2265:
2263:
2261:
2259:
2257:
2217:
2215:
2204:
2202:
2200:
2189:
2152:
2150:
2148:
2146:
2144:
2142:
2140:
2138:
2136:
2134:
2123:
2006:network instead of an
2002:to communicate over a
1621:3271 remote controller
1617:
1609:
1537:
1425:All Points Addressable
1051:
870:
862:
811:
780:
726:3472 β except model G
523:
150:Most 3270 devices are
147:
55:
4749:. September 13, 2021.
4479:"3270 -Brief History"
4477:Klaus Brandstaetter.
4187:"DPD Chronology 1971"
3778:Later models include
3389:Select Read Modified
2018:Technical Information
1705:Extended Highlighting
1644:configuration support
1624:3272 local controller
1615:
1607:
1535:
1435:The application i.e.
1049:
868:
860:
809:
778:
562:were available as an
536:keyboard numeric lock
521:
309:OS/360 and successors
145:
53:
43:3270 (disambiguation)
5566:Character Attributes
5564:, pp. 1-7β1-9,
5532:, pp. 1-6β1-7,
4606:on November 5, 2017.
4576:on January 17, 2005.
4570:"IBM Archives: 1979"
4489:on February 16, 2012
4291:, pp. 2β2, 8β1.
4289:3270 An Introduction
4232:on December 26, 2010
4197:on October 23, 2009.
4000:SNA only, causes an
3958:List of IBM products
3867:Extended Data Stream
3844:Start Field Extended
3806:Character attributes
3717:Character attributes
1952:IBM's difficult time
1702:Extended Data Stream
1223:Informer 270 376/SNA
638:3179 β Models G1, G2
614:Display Station Name
544:magnetic stripe card
530:, ASCII rather than
367:McGill University's
360:Various versions of
88:terminals. Unlike a
66:display and printer
5854:IBM display devices
5822:Partial IBM history
5810:. Cisco. July 1998.
5754:TN3270 Enhancements
5183:. October 16, 2021.
4528:"IBM 3277 Terminal"
4148:Graphic Escape (GE)
4136:Later models added
3800:extended attributes
3786:Extended attributes
3712:Extended attributes
3668:Character to repeat
3579:Attribute character
3544:
3345:Select Read Buffer;
3113:
2037:
1960:Fujisawa laboratory
1810:Non-IBM Controllers
1608:IBM 3174 controller
1560:4224 matrix printer
1544:3286 matrix printer
1541:3284 matrix printer
1351:
1067:(logical screens).
1065:explicit partitions
1036:Winchester, England
914:
610:
419:Front End Processor
305:Time Sharing Option
241:data entry keyboard
229:typewriter keyboard
5275:3270 Character Set
5259:3270 Character Set
5247:3270 Character Set
5203:. October 4, 2021.
5163:. October 4, 2021.
4534:. February 2, 2017
4532:VintageComputer.ca
4347:. April 27, 2004.
4145:Set Attribute (SA)
3886:. You can help by
3622:Insert Cursor (IC)
3542:
3429:Select WRT Command
3290:Read Modified All
3111:
2035:
2023:3270 character set
1956:Endicott, New York
1948:Kingston, New York
1618:
1610:
1564:In 1984 announced
1538:
1514:Display-Controller
1390:Introductory price
1261:Memorex/Telex 2179
1258:Memorex/Telex 2178
1255:Memorex/Telex 2080
1252:Memorex/Telex 2079
1249:Memorex/Telex 2078
1061:programmed symbols
1052:
912:
871:
863:
812:
781:
742:3482 β all models
608:
583:terminal emulation
524:
148:
68:computer terminals
56:
5102:3174 Introduction
5076:on March 2, 2016.
5044:3174 Introduction
4870:on June 8, 2021.
4639:3270 Introduction
4171:3270 Introduction
4142:Modify Field (MF)
3904:
3903:
3829:Buffer addressing
3695:
3694:
3615:Buffer addressing
3520:
3519:
3088:
3087:
2000:terminal emulator
1964:Yamato laboratory
1550:3288 line printer
1408:
1407:
972:
971:
749:
748:
718:3290 β all models
710:3279 β all models
702:3278 β all models
694:3277 β all models
686:3194 β all models
678:3193 β all models
654:3191 β all models
622:3178 β all models
573:A version of the
389:A version of the
237:Program Attention
16:(Redirected from
5886:
5833:rbanffy/3270font
5811:
5803:
5794:
5792:10.17487/RFC6270
5775:
5766:
5764:10.17487/RFC2355
5747:
5738:
5736:10.17487/RFC1576
5719:
5710:
5708:10.17487/RFC1041
5689:
5687:
5676:
5674:
5663:
5661:
5650:
5648:
5637:
5635:
5624:
5622:
5611:
5609:
5598:
5596:
5581:
5578:3270 Data Stream
5575:
5569:
5562:3270 Data Stream
5559:
5553:
5546:3270 Data Stream
5543:
5537:
5534:Field Attributes
5530:3270 Data Stream
5527:
5518:
5511:3270 Data Stream
5508:
5502:
5495:3270 Data Stream
5492:
5486:
5483:3270 Data Stream
5480:
5474:
5471:3270 Data Stream
5468:
5462:
5459:3274 Description
5456:
5450:
5447:3274 Description
5444:
5438:
5435:3274 Description
5432:
5426:
5423:3274 Description
5420:
5414:
5411:3274 Description
5408:
5402:
5399:3274 Description
5396:
5390:
5387:3274 Description
5384:
5378:
5375:3274 Description
5372:
5366:
5363:3270 Data Stream
5360:
5354:
5351:3270 Data Stream
5348:
5342:
5339:3270 Data Stream
5336:
5330:
5327:3270 Data Stream
5324:
5318:
5315:3270 Data Stream
5312:
5306:
5303:3270 Data Stream
5300:
5294:
5291:3274 Description
5288:
5282:
5272:
5266:
5256:
5250:
5244:
5238:
5232:
5226:
5225:
5219:
5211:
5205:
5204:
5191:
5185:
5184:
5171:
5165:
5164:
5151:
5145:
5144:
5137:
5131:
5130:
5128:
5119:
5111:
5105:
5099:
5093:
5092:
5084:
5078:
5077:
5075:
5069:. Archived from
5068:
5057:
5051:
5041:
5035:
5034:
5026:. Archived from
5016:
5010:
5009:
4994:
4988:
4987:
4971:
4965:
4964:
4953:
4947:
4946:
4930:
4924:
4923:
4906:
4900:
4899:
4882:
4876:
4875:
4856:
4850:
4840:
4834:
4833:
4831:
4829:
4815:
4809:
4808:
4806:
4804:
4794:
4786:
4780:
4779:
4757:
4751:
4750:
4737:
4731:
4730:
4724:
4716:
4710:
4709:
4703:
4695:
4689:
4688:
4682:
4674:
4668:
4667:
4652:
4646:
4636:
4630:
4629:
4614:
4608:
4607:
4602:. Archived from
4596:
4590:
4587:3270 Data Stream
4584:
4578:
4577:
4566:
4560:
4550:
4544:
4543:
4541:
4539:
4524:
4518:
4517:
4515:
4505:
4499:
4498:
4496:
4494:
4485:. Archived from
4474:
4468:
4467:
4465:
4454:
4435:
4434:
4411:
4405:
4404:
4388:
4379:
4378:
4362:
4356:
4355:
4335:
4329:
4328:
4310:
4304:
4298:
4292:
4286:
4280:
4279:
4266:
4260:
4254:
4245:
4244:
4239:
4237:
4228:. Archived from
4222:
4216:
4215:
4205:
4199:
4198:
4183:
4174:
4168:
4151:
4134:
4128:
4125:
4110:
4107:
4096:
4093:
4082:
4079:
4073:
4070:
4064:
4057:
4048:
4045:
4039:
4033:
4027:
4020:
4014:
4011:
4005:
3998:
3992:
3989:
3899:
3896:
3878:
3871:
3723:Field attributes
3707:Field attributes
3639:Program Tab (PT)
3573:Start Field (SF)
3545:
3543:Orders for 3277
3114:
2380:
2366:
2357:
2350:
2333:
2318:
2298:
2281:
2274:
2250:
2242:
2233:
2224:
2213:
2198:
2187:
2178:
2171:
2164:
2132:
2121:
2114:
2107:
2100:
2038:
1990:Telnet 3270, or
1877:connector and a
1593:
1395:
1385:
1383:
1357:
1352:
1328:Latin characters
1178:Non-IBM Displays
915:
913:Base color mode
611:
54:IBM 3277 Model 2
21:
5894:
5893:
5889:
5888:
5887:
5885:
5884:
5883:
5839:
5838:
5818:
5806:
5778:
5750:
5722:
5694:
5685:
5679:
5672:
5666:
5659:
5653:
5646:
5640:
5633:
5627:
5620:
5614:
5607:
5601:
5594:
5588:
5585:
5584:
5576:
5572:
5560:
5556:
5548:, p. 1-7,
5544:
5540:
5528:
5521:
5509:
5505:
5493:
5489:
5481:
5477:
5469:
5465:
5457:
5453:
5445:
5441:
5433:
5429:
5421:
5417:
5409:
5405:
5397:
5393:
5385:
5381:
5373:
5369:
5361:
5357:
5349:
5345:
5337:
5333:
5325:
5321:
5313:
5309:
5301:
5297:
5289:
5285:
5277:, p. 9-9,
5273:
5269:
5261:, p. 9-2,
5257:
5253:
5245:
5241:
5233:
5229:
5217:
5213:
5212:
5208:
5193:
5192:
5188:
5173:
5172:
5168:
5153:
5152:
5148:
5139:
5138:
5134:
5126:
5117:
5113:
5112:
5108:
5100:
5096:
5086:
5085:
5081:
5073:
5066:
5059:
5058:
5054:
5042:
5038:
5018:
5017:
5013:
4999:"3270 Graphics"
4996:
4995:
4991:
4973:
4972:
4968:
4955:
4954:
4950:
4932:
4931:
4927:
4908:
4907:
4903:
4884:
4883:
4879:
4858:
4857:
4853:
4841:
4837:
4827:
4825:
4817:
4816:
4812:
4802:
4800:
4792:
4788:
4787:
4783:
4768:
4765:Wayback Machine
4758:
4754:
4739:
4738:
4734:
4722:
4718:
4717:
4713:
4701:
4697:
4696:
4692:
4680:
4676:
4675:
4671:
4654:
4653:
4649:
4637:
4633:
4616:
4615:
4611:
4598:
4597:
4593:
4585:
4581:
4568:
4567:
4563:
4551:
4547:
4537:
4535:
4526:
4525:
4521:
4513:
4507:
4506:
4502:
4492:
4490:
4476:
4475:
4471:
4463:
4456:
4455:
4438:
4428:
4413:
4412:
4408:
4390:
4389:
4382:
4364:
4363:
4359:
4337:
4336:
4332:
4312:
4311:
4307:
4303:, pp. 1β3.
4299:
4295:
4287:
4283:
4270:"3270 clusters"
4268:
4267:
4263:
4255:
4248:
4235:
4233:
4224:
4223:
4219:
4207:
4206:
4202:
4185:
4184:
4177:
4169:
4165:
4160:
4155:
4154:
4135:
4131:
4126:
4113:
4108:
4099:
4094:
4085:
4080:
4076:
4071:
4067:
4058:
4051:
4046:
4042:
4035:Other than the
4034:
4030:
4021:
4017:
4012:
4008:
3999:
3995:
3990:
3971:
3966:
3935:
3900:
3894:
3891:
3884:needs expansion
3869:
3864:
3856:
3831:
3808:
3788:
3725:
3700:
3612:
3580:
3537:
3525:
3430:
3368:
3346:
3134:
3106:
3093:
2374:
2362:
2353:
2344:
2329:
2314:
2294:
2277:
2270:
2245:
2236:
2227:
2220:
2207:
2192:
2181:
2174:
2167:
2160:
2126:
2117:
2110:
2103:
2096:
2025:
2020:
1988:
1944:
1920:
1895:
1864:
1833:
1817:
1812:
1739:
1737:3174 controller
1681:8" floppy drive
1674:
1672:3274 controller
1602:
1592:
1530:
1516:
1496:
1487:
1480:
1476:
1472:
1456:IBM 4300 series
1429:vector graphics
1393:
1381:
1379:
1378:March 1984
1355:
1347:
1316:
1292:
1290:Graphics models
1281:
1268:
1240:
1236:
1225:
1197:
1188:
1180:
1173:3472 Infowindow
1163:
1140:
1131:
1106:
1098:
1089:
1076:
1044:
1019:) link. In the
985:Neutral (White)
855:
786:
754:
734:3472 β model G
591:
552:
516:
492:screen scraping
461:/Incoterm Div,
455:Hewlett-Packard
443:
406:
274:
239:(PA) keys. The
124:
62:is a family of
46:
39:
28:
23:
22:
15:
12:
11:
5:
5892:
5890:
5882:
5881:
5876:
5871:
5866:
5861:
5856:
5851:
5841:
5840:
5837:
5836:
5830:
5825:
5817:
5816:External links
5814:
5813:
5812:
5804:
5776:
5748:
5720:
5691:
5690:
5677:
5664:
5651:
5638:
5625:
5612:
5599:
5583:
5582:
5570:
5554:
5538:
5519:
5503:
5487:
5475:
5463:
5451:
5439:
5427:
5415:
5403:
5391:
5379:
5367:
5355:
5343:
5331:
5319:
5307:
5295:
5283:
5267:
5251:
5239:
5227:
5206:
5186:
5166:
5146:
5132:
5106:
5094:
5079:
5052:
5036:
5011:
4989:
4966:
4948:
4943:comp.terminals
4925:
4901:
4877:
4851:
4843:3270 Color PSS
4835:
4810:
4781:
4752:
4732:
4711:
4690:
4669:
4647:
4631:
4609:
4591:
4579:
4561:
4553:3270 Color PSS
4545:
4519:
4500:
4469:
4466:. GA27-2749-1.
4436:
4426:
4406:
4380:
4357:
4330:
4305:
4293:
4281:
4261:
4246:
4217:
4200:
4175:
4162:
4161:
4159:
4156:
4153:
4152:
4150:
4149:
4146:
4143:
4140:
4129:
4111:
4097:
4083:
4074:
4065:
4049:
4040:
4028:
4015:
4006:
4002:expedited flow
3993:
3968:
3967:
3965:
3962:
3961:
3960:
3955:
3941:
3934:
3931:
3930:
3929:
3926:
3923:
3920:
3917:
3914:
3911:
3902:
3901:
3895:September 2020
3881:
3879:
3868:
3865:
3861:
3855:
3852:
3830:
3827:
3807:
3804:
3787:
3784:
3776:
3775:
3771:
3770:
3769:
3766:
3759:
3756:
3746:
3743:
3732:
3724:
3721:
3720:
3719:
3714:
3709:
3699:
3696:
3693:
3692:
3689:
3687:
3686:Address byte 2
3684:
3683:Address byte 1
3681:
3678:
3674:
3673:
3669:
3666:
3665:Address byte 2
3663:
3662:Address byte 1
3660:
3657:
3653:
3652:
3649:
3647:
3645:
3643:
3640:
3636:
3635:
3632:
3630:
3628:
3626:
3623:
3619:
3618:
3609:
3607:
3606:Address byte 2
3604:
3603:Address byte 1
3601:
3598:
3594:
3593:
3590:
3588:
3586:
3577:
3574:
3570:
3569:
3566:
3563:
3560:
3556:
3555:
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3549:
3536:
3533:
3524:
3521:
3518:
3517:
3513:
3512:
3509:
3506:
3503:
3500:
3497:
3493:
3492:
3489:
3486:
3483:
3480:
3477:
3473:
3472:
3469:
3466:
3463:
3460:
3457:
3453:
3452:
3449:
3446:
3443:
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3437:
3433:
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3427:
3424:
3421:
3418:
3415:
3411:
3410:
3407:
3404:
3401:
3398:
3395:
3391:
3390:
3387:
3384:
3381:
3378:
3375:
3371:
3370:
3365:
3362:
3359:
3356:
3353:
3349:
3348:
3343:
3340:
3337:
3334:
3331:
3327:
3326:
3323:
3320:
3317:
3314:
3311:
3307:
3306:
3303:
3300:
3297:
3294:
3291:
3287:
3286:
3283:
3280:
3277:
3274:
3271:
3270:Read Modified
3267:
3266:
3263:
3260:
3257:
3254:
3251:
3247:
3246:
3243:
3240:
3237:
3234:
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3227:
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3223:
3220:
3217:
3214:
3211:
3207:
3206:
3203:
3200:
3197:
3194:
3191:
3187:
3186:
3183:
3180:
3177:
3174:
3171:
3167:
3166:
3163:
3160:
3157:
3154:
3151:
3147:
3146:
3144:
3142:
3139:
3136:
3131:
3128:
3127:
3124:
3121:
3118:
3112:3270 commands
3105:
3102:
3092:
3089:
3086:
3085:
3083:
3081:
3079:
3077:
3075:
3073:
3068:
3063:
3058:
3053:
3048:
3043:
3038:
3033:
3028:
3023:
3019:
3018:
3016:
3014:
3012:
3010:
3008:
3006:
3001:
2996:
2991:
2986:
2981:
2976:
2971:
2966:
2964:
2962:
2958:
2957:
2955:
2953:
2951:
2949:
2947:
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2940:
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2930:
2925:
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2915:
2910:
2905:
2900:
2898:
2894:
2893:
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2889:
2887:
2885:
2883:
2881:
2876:
2871:
2866:
2861:
2856:
2851:
2846:
2841:
2836:
2834:
2830:
2829:
2827:
2825:
2823:
2821:
2819:
2817:
2815:
2813:
2811:
2809:
2807:
2805:
2803:
2801:
2799:
2797:
2793:
2792:
2790:
2788:
2786:
2784:
2782:
2780:
2775:
2770:
2765:
2760:
2755:
2750:
2745:
2740:
2738:
2736:
2732:
2731:
2729:
2727:
2725:
2723:
2721:
2719:
2714:
2709:
2704:
2699:
2694:
2689:
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2679:
2674:
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2668:
2667:
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2645:
2640:
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2630:
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2620:
2615:
2610:
2608:
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2598:
2593:
2588:
2583:
2578:
2573:
2571:
2569:
2567:
2565:
2563:
2561:
2559:
2557:
2555:
2553:
2549:
2548:
2543:
2538:
2533:
2528:
2523:
2518:
2516:
2514:
2512:
2510:
2508:
2506:
2504:
2502:
2497:
2492:
2488:
2487:
2482:
2477:
2472:
2467:
2462:
2457:
2455:
2453:
2451:
2449:
2447:
2445:
2443:
2441:
2439:
2434:
2430:
2429:
2424:
2419:
2414:
2409:
2404:
2399:
2397:
2395:
2393:
2391:
2389:
2387:
2385:
2383:
2381:
2372:
2368:
2367:
2360:
2358:
2351:
2342:
2340:
2338:
2336:
2334:
2327:
2325:
2323:
2321:
2319:
2312:
2310:
2308:
2304:
2303:
2301:
2299:
2292:
2290:
2288:
2286:
2284:
2282:
2275:
2268:
2266:
2264:
2262:
2260:
2258:
2256:
2252:
2251:
2243:
2234:
2225:
2218:
2216:
2214:
2205:
2203:
2201:
2199:
2190:
2188:
2179:
2172:
2165:
2158:
2154:
2153:
2151:
2149:
2147:
2145:
2143:
2141:
2139:
2137:
2135:
2133:
2124:
2122:
2115:
2108:
2101:
2094:
2090:
2089:
2086:
2083:
2080:
2077:
2074:
2071:
2068:
2065:
2062:
2059:
2056:
2053:
2050:
2047:
2044:
2041:
2024:
2021:
2019:
2016:
1987:
1984:
1943:
1940:
1919:
1916:
1915:
1914:
1911:
1908:
1905:
1894:
1891:
1863:
1860:
1859:
1858:
1855:
1852:
1849:
1846:
1843:
1840:
1832:
1829:
1828:
1827:
1824:
1816:
1813:
1811:
1808:
1738:
1735:
1734:
1733:
1730:
1727:
1724:
1721:
1718:
1715:
1712:
1709:
1706:
1703:
1673:
1670:
1640:
1639:
1636:
1625:
1622:
1601:
1598:
1578:laser printers
1562:
1561:
1558:
1551:
1548:
1545:
1542:
1529:
1526:
1525:
1524:
1520:
1515:
1512:
1495:
1492:
1486:
1483:
1478:
1474:
1471:
1468:
1458:, 303x, 308x,
1452:IBM System/370
1406:
1405:
1402:
1398:
1397:
1391:
1387:
1386:
1376:
1372:
1371:
1366:
1362:
1361:
1358:
1346:
1343:
1315:
1312:
1291:
1288:
1280:
1277:
1276:
1275:
1272:
1267:
1266:Nokia/Alfaskop
1264:
1263:
1262:
1259:
1256:
1253:
1250:
1243:
1242:
1235:
1232:
1224:
1221:
1220:
1219:
1216:
1213:
1210:
1207:
1196:
1193:
1187:
1184:
1179:
1176:
1175:
1174:
1171:
1162:
1159:
1158:
1157:
1154:
1151:
1139:
1136:
1130:
1127:
1126:
1125:
1122:
1119:
1116:
1113:
1110:
1105:
1102:
1097:
1094:
1088:
1085:
1084:
1083:
1080:
1075:
1072:
1056:plasma display
1043:
1040:
1005:
1004:
1001:
998:
995:
992:
989:
986:
982:
981:
978:
977:Extended color
974:
973:
970:
969:
966:
963:
959:
958:
955:
952:
948:
947:
944:
941:
937:
936:
933:
930:
926:
925:
922:
919:
908:
907:
904:
900:
899:
898:
897:
894:
891:
888:
885:
854:
851:
843:
842:
839:
838:
837:
834:
831:
828:
822:
821:
820:
817:
814:
803:
800:
799:model 2: 80Γ24
797:
796:model 1: 80x12
785:
782:
773:
772:
761:
758:
753:
750:
747:
746:
743:
739:
738:
735:
731:
730:
727:
723:
722:
719:
715:
714:
711:
707:
706:
703:
699:
698:
695:
691:
690:
687:
683:
682:
679:
675:
674:
671:
670:3192 β Model G
667:
666:
663:
659:
658:
655:
651:
650:
647:
646:3180 β Model 1
643:
642:
639:
635:
634:
631:
630:3179 β Model 1
627:
626:
623:
619:
618:
615:
590:
587:
551:
548:
515:
512:
503:expansion card
442:
439:
405:
402:
394:word processor
278:IBM System/370
273:
270:
202:BNC connectors
123:
120:
76:IBM mainframes
70:introduced by
64:block oriented
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
5891:
5880:
5877:
5875:
5872:
5870:
5867:
5865:
5862:
5860:
5857:
5855:
5852:
5850:
5847:
5846:
5844:
5834:
5831:
5829:
5826:
5823:
5820:
5819:
5815:
5809:
5805:
5801:
5798:
5793:
5788:
5784:
5783:
5777:
5773:
5770:
5765:
5760:
5756:
5755:
5749:
5745:
5742:
5737:
5732:
5728:
5727:
5721:
5717:
5714:
5709:
5704:
5700:
5699:
5693:
5692:
5684:
5683:
5678:
5671:
5670:
5665:
5658:
5657:
5652:
5645:
5644:
5639:
5632:
5631:
5626:
5619:
5618:
5613:
5606:
5605:
5600:
5593:
5592:
5587:
5586:
5579:
5574:
5571:
5567:
5563:
5558:
5555:
5551:
5547:
5542:
5539:
5535:
5531:
5526:
5524:
5520:
5516:
5512:
5507:
5504:
5500:
5496:
5491:
5488:
5484:
5479:
5476:
5472:
5467:
5464:
5460:
5455:
5452:
5448:
5443:
5440:
5436:
5431:
5428:
5424:
5419:
5416:
5412:
5407:
5404:
5400:
5395:
5392:
5388:
5383:
5380:
5376:
5371:
5368:
5364:
5359:
5356:
5352:
5347:
5344:
5340:
5335:
5332:
5328:
5323:
5320:
5316:
5311:
5308:
5304:
5299:
5296:
5292:
5287:
5284:
5280:
5276:
5271:
5268:
5264:
5260:
5255:
5252:
5248:
5243:
5240:
5236:
5231:
5228:
5223:
5216:
5210:
5207:
5202:
5201:
5196:
5190:
5187:
5182:
5181:
5176:
5170:
5167:
5162:
5161:
5156:
5150:
5147:
5142:
5136:
5133:
5125:
5124:
5116:
5110:
5107:
5103:
5098:
5095:
5090:
5083:
5080:
5072:
5065:
5064:
5056:
5053:
5049:
5045:
5040:
5037:
5033:
5029:
5025:
5021:
5015:
5012:
5008:
5004:
5000:
4993:
4990:
4986:
4982:
4981:
4980:Computerworld
4976:
4970:
4967:
4962:
4958:
4952:
4949:
4944:
4940:
4936:
4929:
4926:
4922:
4918:
4917:
4916:Network World
4912:
4905:
4902:
4898:
4894:
4893:
4888:
4881:
4878:
4874:
4869:
4865:
4861:
4855:
4852:
4848:
4844:
4839:
4836:
4824:
4820:
4814:
4811:
4798:
4791:
4785:
4782:
4777:
4776:
4771:
4766:
4762:
4756:
4753:
4748:
4747:
4742:
4736:
4733:
4728:
4721:
4715:
4712:
4707:
4700:
4694:
4691:
4686:
4679:
4673:
4670:
4666:
4661:
4657:
4651:
4648:
4644:
4640:
4635:
4632:
4627:
4623:
4619:
4613:
4610:
4605:
4601:
4595:
4592:
4588:
4583:
4580:
4575:
4571:
4565:
4562:
4558:
4554:
4549:
4546:
4533:
4529:
4523:
4520:
4512:
4511:
4504:
4501:
4488:
4484:
4480:
4473:
4470:
4462:
4461:
4453:
4451:
4449:
4447:
4445:
4443:
4441:
4437:
4433:
4429:
4427:1-56592-676-5
4423:
4419:
4418:
4410:
4407:
4403:
4399:
4398:
4393:
4387:
4385:
4381:
4377:
4373:
4372:
4367:
4361:
4358:
4354:
4352:
4351:read modified
4346:
4345:
4340:
4334:
4331:
4326:
4322:
4321:
4316:
4309:
4306:
4302:
4297:
4294:
4290:
4285:
4282:
4277:
4276:
4275:Computerworld
4271:
4265:
4262:
4258:
4253:
4251:
4247:
4243:
4231:
4227:
4221:
4218:
4214:
4210:
4204:
4201:
4196:
4192:
4188:
4182:
4180:
4176:
4172:
4167:
4164:
4157:
4147:
4144:
4141:
4138:
4137:
4133:
4130:
4124:
4122:
4120:
4118:
4116:
4112:
4106:
4104:
4102:
4098:
4092:
4090:
4088:
4084:
4078:
4075:
4069:
4066:
4062:
4059:Similar to a
4056:
4054:
4050:
4044:
4041:
4038:
4032:
4029:
4025:
4019:
4016:
4010:
4007:
4003:
3997:
3994:
3988:
3986:
3984:
3982:
3980:
3978:
3976:
3974:
3970:
3963:
3959:
3956:
3953:
3952:IBM System/3X
3949:
3945:
3942:
3940:
3939:3270 emulator
3937:
3936:
3932:
3927:
3924:
3921:
3918:
3915:
3912:
3909:
3908:
3907:
3898:
3889:
3885:
3882:This section
3880:
3877:
3873:
3872:
3866:
3860:
3853:
3851:
3847:
3845:
3841:
3837:
3828:
3826:
3824:
3819:
3817:
3813:
3805:
3803:
3801:
3797:
3793:
3785:
3783:
3781:
3772:
3767:
3764:
3760:
3757:
3754:
3750:
3749:
3747:
3744:
3741:
3737:
3733:
3730:
3729:
3728:
3722:
3718:
3715:
3713:
3710:
3708:
3705:
3704:
3703:
3697:
3690:
3688:
3685:
3682:
3679:
3676:
3675:
3670:
3667:
3664:
3661:
3658:
3655:
3654:
3650:
3648:
3646:
3644:
3641:
3638:
3637:
3633:
3631:
3629:
3627:
3624:
3621:
3620:
3616:
3610:
3608:
3605:
3602:
3599:
3596:
3595:
3591:
3589:
3587:
3584:
3578:
3575:
3572:
3571:
3567:
3564:
3561:
3558:
3557:
3546:
3540:
3534:
3532:
3530:
3522:
3514:
3510:
3507:
3504:
3501:
3498:
3495:
3494:
3490:
3487:
3484:
3481:
3478:
3475:
3474:
3470:
3467:
3464:
3461:
3458:
3455:
3454:
3450:
3447:
3444:
3441:
3438:
3435:
3434:
3428:
3425:
3422:
3419:
3416:
3413:
3412:
3408:
3405:
3402:
3399:
3396:
3393:
3392:
3388:
3385:
3382:
3379:
3376:
3373:
3372:
3366:
3363:
3360:
3357:
3354:
3351:
3350:
3344:
3341:
3338:
3335:
3332:
3329:
3328:
3324:
3321:
3318:
3315:
3312:
3309:
3308:
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3230:No Operation
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3209:
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2039:
2033:
2029:
2022:
2017:
2015:
2013:
2009:
2005:
2001:
1997:
1993:
1985:
1983:
1981:
1977:
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1969:
1965:
1961:
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1399:
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1359:
1356:Also known as
1353:
1344:
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1331:
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1313:
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1234:Memorex Telex
1233:
1231:
1229:
1222:
1217:
1214:
1211:
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1204:
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1024:
1022:
1018:
1014:
1010:
1009:IBM mainframe
1002:
999:
996:
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987:
984:
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979:
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964:
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848:
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835:
833:reverse video
832:
830:character set
829:
826:
825:
823:
818:
815:
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801:
798:
795:
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788:
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779:3278 terminal
777:
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441:Third parties
440:
438:
436:
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420:
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411:
403:
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387:
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279:
271:
269:
268:appreciated.
266:
262:
257:
255:
251:
246:
242:
238:
234:
230:
225:
223:
222:screen buffer
219:
213:
209:
207:
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199:
193:
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190:
189:multi-dropped
185:
181:
177:
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169:
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144:
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105:coaxial cable
102:
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87:
86:
81:
77:
73:
69:
65:
61:
52:
48:
44:
37:
33:
19:
18:3270 terminal
5781:
5753:
5725:
5697:
5681:
5668:
5655:
5642:
5629:
5616:
5603:
5590:
5573:
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5310:
5298:
5286:
5270:
5254:
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5230:
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5209:
5198:
5189:
5178:
5169:
5158:
5149:
5135:
5122:
5109:
5097:
5082:
5071:the original
5062:
5055:
5039:
5031:
5028:the original
5023:
5014:
5006:
5003:Prycroft Six
5002:
4992:
4984:
4978:
4969:
4960:
4951:
4928:
4920:
4914:
4904:
4896:
4890:
4880:
4871:
4868:the original
4863:
4854:
4838:
4826:. Retrieved
4823:Cybertelecom
4822:
4813:
4801:. Retrieved
4796:
4784:
4773:
4761:Ghostarchive
4759:Archived at
4755:
4744:
4735:
4726:
4714:
4705:
4693:
4684:
4672:
4663:
4659:
4650:
4634:
4626:the original
4621:
4612:
4604:the original
4594:
4582:
4574:the original
4564:
4548:
4536:. Retrieved
4531:
4522:
4509:
4503:
4491:. Retrieved
4487:the original
4483:HOB Techtalk
4482:
4472:
4459:
4431:
4416:
4409:
4401:
4395:
4375:
4369:
4360:
4350:
4348:
4342:
4333:
4318:
4308:
4296:
4284:
4273:
4264:
4241:
4234:. Retrieved
4230:the original
4220:
4212:
4203:
4195:the original
4190:
4166:
4132:
4077:
4068:
4043:
4031:
4018:
4009:
4001:
3996:
3905:
3892:
3888:adding to it
3883:
3857:
3848:
3843:
3839:
3835:
3832:
3820:
3809:
3799:
3789:
3779:
3777:
3762:
3752:
3739:
3735:
3726:
3701:
3554:Description
3538:
3528:
3526:
3250:Read Buffer
3190:Erase/Write
3120:Hexadecimal
3107:
3098:
3094:
2197:
2182:
2030:
2026:
1991:
1989:
1945:
1936:
1929:
1925:
1921:
1918:Multiplexers
1899:
1896:
1865:
1834:
1818:
1805:
1801:
1798:
1795:
1791:
1787:
1783:
1780:
1776:
1773:
1769:
1766:
1762:
1754:
1750:
1747:
1743:
1740:
1729:Entry Assist
1697:
1693:
1689:
1685:
1678:
1675:
1666:twisted pair
1651:
1646:
1643:
1641:
1595:
1590:
1575:
1563:
1536:4224 printer
1509:
1505:
1497:
1488:
1473:
1445:
1442:
1434:
1428:
1424:
1421:
1411:
1409:
1375:Release date
1365:Manufacturer
1340:
1336:
1332:
1325:
1317:
1301:
1297:
1293:
1282:
1244:
1226:
1201:
1198:
1189:
1181:
1141:
1132:
1099:
1090:
1069:
1064:
1060:
1053:
1025:
1006:
965:Intensified
943:Intensified
940:Unprotected
929:Unprotected
874:
872:
846:
844:
617:CUT vs. DFT
609:CUT vs. DFT
604:
596:
592:
572:
567:
555:
553:
539:
535:
528:selector-pen
527:
525:
496:
444:
437:, and VTAM.
407:
388:
380:OfficeVision
377:
373:
366:
359:
353:
324:
322:The SPF and
321:
317:
303:
289:
275:
272:Applications
258:
254:Attention ID
253:
244:
240:
236:
228:
226:
214:
210:
194:
187:
179:
171:
164:twisted pair
156:control unit
155:
151:
149:
125:
115:
109:
101:data streams
85:green screen
83:
59:
57:
47:
5513:, pp.
4845:, pp.
4555:, pp.
4191:ArchiveIETF
3840:Start Field
3763:intensified
3736:unprotected
3559:Byte 1
3414:Select WRT
3394:Select RMP
3352:Select RBP
3091:Data stream
1986:Telnet 3270
1976:HortolΓ’ndia
1942:Manufacture
1600:Controllers
1013:data stream
918:Protection
836:underscored
589:CUT vs. DFT
577:called the
508:IBM 3270 PC
467:ITT Courier
391:WordPerfect
328:(ISPF/PDF)
265:Lotus 1-2-3
133:main memory
32:IBM 3270 PC
5843:Categories
5195:"Pytn3270"
5046:, p.
4493:August 19,
4158:References
3948:IBM AS/400
3780:base color
3698:Attributes
3583:Attributes
3374:Select RM
3330:Select RB
1862:Home grown
1654:Token Ring
1494:APL / APL2
1404:IBM 3192-G
1161:Subsequent
1146:transfer.
962:Protected
951:Protected
921:Intensity
903:Base color
602:software.
499:Irma board
473:, Harris,
398:System/370
396:ported to
160:Token Ring
122:Principles
97:interrupts
4939:Newsgroup
4892:InfoWorld
4803:March 14,
4799:. Memorex
4727:Bitsavers
4706:Bitsavers
4685:Bitsavers
4236:March 15,
4061:light pen
3774:modified.
3740:protected
3456:Sense ID
3126:Function
1691:Station.
1485:IBM 3472G
1470:IBM 3192G
1412:IBM 3179G
1401:Successor
1394:US$ 2,295
1350:IBM 3179G
1345:IBM 3179G
1314:IBM 3279G
1144:IND$ FILE
1003:Turquoise
791:dead keys
769:Tektronix
560:dead keys
459:Honeywell
307:(TSO) in
293:(CMS) in
250:interrupt
152:clustered
5235:RFC 6270
4763:and the
4538:June 11,
4315:IBM+3270
4257:RFC 2355
4095:BSC only
3944:IBM 5250
3933:See also
3135:non-SNA
3123:Graphic
3117:Command
3104:Commands
1980:Campinas
1972:Greenock
1658:Ethernet
1555:IBM 8100
1528:Printers
1464:IBM 9370
1460:IBM 3090
1304:IBM GDDM
1284:AT&T
1279:AT&T
1168:IBM 8100
1050:IBM 3290
875:IBM 3279
827:blinking
550:Displays
483:AT&T
479:Teletype
475:Alfaskop
369:MUSIC/SP
168:Ethernet
129:IBM 3033
80:IBM 2260
60:IBM 3270
5515:1-6β1-9
4941::
4847:7-1β7-7
4828:May 17,
4775:YouTube
4557:3-1β3-6
4353:command
4317:at the
3854:Example
3568:Byte 4
3310:Select
3138:EBCDIC
1978:, near
1968:Hursley
1893:Memorex
1873:with a
1868:Arduino
1580:, from
1479:was the
1382:1984-03
1380: (
1215:9279-3G
1212:9279-2A
1034:, near
954:Normal
932:Normal
881:Models
579:3270 PC
487:HP 2640
463:Memorex
345:editors
330:editors
176:channel
5200:GitHub
5180:GitHub
5175:"Coax"
5160:GitHub
4746:GitHub
4424:
3954:family
3565:Byte 3
3562:Byte 2
3548:Order
3535:Orders
3476:Write
3436:Sense
3141:ASCII
2576::
2427:|
2379:
2375:
2349:
2345:
2246:
2241:
2237:
2232:
2228:
2212:
2208:
2193:
2186:
2131:
2127:
2012:telnet
2004:TCP/IP
1996:telnet
1992:tn3270
1879:Python
1871:shield
1831:Harris
1647:letter
1557:system
1462:, and
1195:Harris
1170:system
1000:Yellow
968:White
935:Green
924:Color
765:RS232C
575:IBM PC
532:EBCDIC
514:Models
471:McData
378:IBM's
362:Wylbur
285:panels
206:baluns
180:remote
36:TN3270
5686:(PDF)
5673:(PDF)
5660:(PDF)
5647:(PDF)
5634:(PDF)
5621:(PDF)
5608:(PDF)
5595:(PDF)
5218:(PDF)
5155:"Oec"
5127:(PDF)
5118:(PDF)
5074:(PDF)
5067:(PDF)
4793:(PDF)
4723:(PDF)
4702:(PDF)
4681:(PDF)
4514:(PDF)
4464:(PDF)
3964:Notes
3613:(see
3581:(see
3150:Copy
3133:local
2437:&
1887:VT100
1883:POSIX
1660:, or
1586:Canon
1477:1987
994:Green
957:Blue
501:, an
421:i.e.
384:PROFS
349:VM/SP
342:XEDIT
338:VM/SP
184:modem
172:local
166:, or
5800:6270
5772:2355
5744:1576
5716:1041
4830:2021
4805:2022
4540:2021
4495:2015
4422:ISBN
4325:GFDL
4238:2019
3950:and
3823:LEXX
3816:3279
3814:and
3812:3278
3810:The
3796:3279
3794:and
3792:3278
3790:The
2541:>
2412:<
1913:2274
1910:2174
1907:2076
1904:2074
1857:9220
1854:9210
1851:9116
1662:X.25
1633:SDLC
1437:GDDM
1410:The
1218:9280
1209:9278
1206:9178
1138:3194
1129:3193
1104:3192
1096:3191
1087:3180
1074:317x
1042:3290
997:Pink
991:Blue
946:Red
873:The
853:3279
784:3278
752:3277
745:DFT
737:DFT
729:CUT
721:DFT
713:CUT
705:CUT
697:CUT
689:DFT
681:DFT
673:DFT
665:CUT
657:CUT
649:CUT
641:DFT
633:CUT
625:CUT
556:text
477:and
435:3745
431:3725
427:3720
423:3705
347:for
336:and
332:for
313:ISPF
299:z/VM
282:ISPF
137:CICS
58:The
5797:RFC
5787:doi
5769:RFC
5759:doi
5741:RFC
5731:doi
5713:RFC
5703:doi
5048:1-2
4864:IBM
4660:IBM
4622:IBM
4397:IBM
4371:IBM
4344:IBM
4024:SNA
3890:.
3842:or
3502:F3
3499:11
3485:31
3482:F1
3479:01
3459:E4
3439:04
3417:4B
3397:2B
3377:DB
3355:3B
3333:1B
3313:0B
3299:3E
3296:6E
3279:36
3276:F6
3273:06
3259:22
3256:F2
3253:02
3233:03
3219:3D
3216:7E
3213:0D
3199:35
3196:F5
3193:05
3179:3F
3176:6F
3173:0F
3159:37
3156:F7
3022:Fx
2961:Ex
2897:Dx
2833:Cx
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