Fact-checked by Grok 2 weeks ago

VT100

The VT100 is a video display terminal developed and manufactured by Digital Equipment Corporation (DEC), introduced in August 1978 as the company's first terminal to comply with the ANSI X3.64 standard for control sequences. It featured a 14-inch (CRT) screen capable of displaying 24 rows of 80 characters in a 7x9 pixel matrix, supporting the full US ASCII character set along with advanced attributes like bold text and smooth scrolling. Powered by an microprocessor, the VT100 connected via serial interface at speeds up to 19,200 baud and included a detachable with 65 main keys plus an 18-key , weighing approximately 35 pounds in total. The VT100's design emphasized reliability and user configurability, with on-screen setup menus for adjusting features such as character size, parity, and auto-repeat rates, and it supported optional modes like 132-column display (requiring an advanced video option) and multiple character sets for international use. As part of DEC's evolution from earlier models like the , it introduced innovations including host-controllable status LEDs and the ability to handle scrolling regions, making it suitable for mainframe and environments. Variants such as the cost-reduced VT101 and graphics-enhanced VT105 followed shortly, expanding its capabilities while maintaining . The VT100's influence extended far beyond its production run, establishing it as an industry standard that inspired widespread terminal emulation in software like and modern console applications, with its support becoming a for text-based interfaces in . Millions of units were sold by DEC, cementing its role in the of input-output devices and paving the way for subsequent terminals like the VT100-series successors up to the VT500 line.

History

Development and Release

(DEC) began development of the VT100 video terminal in the mid-1970s as a successor to the , which had been introduced in 1975. The project aimed to create a cost-effective display terminal compatible with DEC's PDP-11 minicomputer systems, emphasizing modularity and adherence to emerging industry standards. , focused on designing an architecture that supported expandable options while keeping production costs low for widespread use in computing environments. The VT100 was the first terminal to implement the ANSI X3.64 standard for control sequences, marking a shift toward standardized terminal communications. Initial manufacturing took place at DEC's facilities in , where the company had established its primary production operations since the 1950s. Released in August 1978, the base VT100 model was priced at approximately $1,195, making it accessible for institutional and commercial buyers. Early adoption was strong among universities and businesses, particularly those relying on PDP-11 systems for and applications, contributing to its rapid integration into academic and corporate computing infrastructures.

Market Impact

The VT100 played a pivotal role in establishing (DEC) as a dominant force in the video terminal market during the late 1970s and 1980s. Introduced in 1978, it quickly became a , with sales reaching one million units by , contributing substantially to DEC's revenue growth in that decade. By the , the broader VT series, building on the VT100's foundation, had sold over six million units worldwide, underscoring the model's enduring commercial success and its influence on DEC's position as a leading vendor of peripherals for systems. The VT100 significantly boosted DEC's in asynchronous terminals, with estimates placing DEC's portion at up to 43% of the market by 1980, based on vendor surveys of shipments totaling around 380,000 units that year. This growth outpaced earlier competitors like the , a popular model that held shares of 9-25% but was surpassed by the VT100's advanced features and compatibility, helping DEC capture a larger segment of the expanding terminal ecosystem for and applications. Key to its adoption was the VT100's integration into pioneering networks and operating environments, including widespread use in sites where users accessed shared resources via DEC VT-100 terminals connected to host systems. It also became a standard peripheral in early Unix environments, supporting on systems like PDP-11 and VAX minicomputers, thereby influencing the development of minicomputer-based workflows in and research. Economically, the VT100's pricing—typically around $1,500 to $3,000 per unit—made it more accessible than IBM's 3270 terminals, which cost approximately $4,500 for the display alone in the late , enabling broader deployment in cost-sensitive data processing setups beyond mainframe-centric operations.

Technical Specifications

Hardware Components

The VT100 video terminal's core hardware revolves around an microprocessor operating at a clock of approximately 2.76 MHz, derived from a 24.8832 MHz divided by 9, which handles all processing tasks including display control, keyboard input, and communication protocols. This 8-bit CPU executes stored in 8 KB of , implemented using four 2K × 8 or a single 8K × 8 package, enabling efficient operation within the terminal's constrained environment. Memory components include 3 KB of RAM primarily dedicated to the screen buffer, utilizing six 1K × 4 dynamic RAM chips to store up to 24 lines of 80 characters (or 14 lines of 132 characters in wide mode), with the remainder allocated for stack, buffers, and temporary data. Additionally, 175 bytes of nonvolatile RAM (NVRAM), based on the ER1400 EAROM device providing 1400 bits organized as 100 × 14-bit words, store user setup configurations such as tab stops and answerback messages, retaining data for up to 10 years without power. The display subsystem features a 12-inch (30 cm) diagonal monochrome () with P4 , offering resolutions of 80 columns by 24 rows or 132 columns by 14 rows, where characters are rendered in a 7 × 9 with descenders for improved . The active display area measures 203 mm × 127 mm (8 inches × 5 inches), and the phosphor's persistence, combined with microprocessor-managed vertical retrace timing, supports smooth scrolling at rates up to 6 lines per second in 60 Hz mode by shifting screen data without full redraws. Input is provided via a detachable 83-key , comprising a 65-key section in ANSI X4.14-1971 layout plus an 18-key , connected by a 1.9 m (6 ft) coiled cord and weighing 2.0 kg (4.5 lb). The main monitor unit, housing the , electronics, and , weighs 13.6 kg (30 lb) total and measures 36.83 cm high × 45.72 cm wide × 36.20 cm deep (approximately 14.5 × 18 × 14.25 inches). Power requirements support switch-selectable inputs of 90-128 or 180-256 at 47-63 Hz, drawing a maximum of 3.0 A at 115 V (or 1.5 A at 230 V) with 250 apparent power and 150 W maximum consumption, protected by a 3 A normal-blow . A detachable 3-prong , 1.9 m (6 ft) long, facilitates connection to standard AC outlets.

Connectivity and Interfaces

The VT100 primarily utilized an serial port as its main communication interface, enabling asynchronous transmission of data between the terminal and a host computer or . This interface conformed to the EIA RS-232-C standard, employing a 25-pin DB-25 connector for connections. It supported full-duplex operation, allowing simultaneous transmission and reception of data, with configurable baud rates ranging from 50 to 19,200 bit/s to accommodate various . For signal management, the interface included provisions for hardware flow control using Request to Send (RTS) and Clear to Send (CTS) signals, where RTS was asserted continuously during operation to indicate readiness, while CTS is ignored by the VT100. Additionally, via XON/XOFF characters was supported to prevent , with the terminal's 64-character input buffer triggering these controls as needed. The interface voltages adhered to RS-232 specifications, with output marks at -6.0 to -12.0 V and spaces at +6.0 to +12.0 V, ensuring compatibility with contemporary modems and direct host connections. An optional 20 mA interface was available through the VT1XX-AA adapter board, providing compatibility with legacy teletype systems and offering improved immunity for short-distance connections without a . This option converted the standard signals to a format, supporting both active and passive modes selectable via a slide switch, with specific pin assignments for transmit and receive circuits on an 8-pin connector. It was particularly useful in environments where electrical could degrade voltage-based signaling.

Features and Capabilities

Display and Character Handling

The VT100 utilizes a 7-bit character encoding based on the DEC National Replacement Character Set (NRCS), which encompasses the standard 96 printable ASCII characters (codes 33 to 126 decimal) while allowing substitution of specific glyphs for national or special purposes. The DEC Special Graphics subset of NRCS replaces certain ASCII positions (octal 137 through 176) with line-drawing and box-drawing symbols, such as horizontal and vertical lines, corners, and geometric shapes like diamonds and arrows, facilitating the creation of simple graphical interfaces like menus or borders on the monochrome display. International variants of NRCS, such as the United Kingdom set invoked via the SCS sequence ESC (A, substitute the ASCII backslash (5C hex) with the pound sign (£) and adjust other symbols for British usage, ensuring compatibility with localized applications without altering the core ASCII structure. The VT100's rendering capabilities emphasize reliable text presentation on its 14-inch CRT with a green phosphor screen, featuring a character resolution of 10x10 dots per cell in 80-column mode (or 9x10 in 132-column mode with AVO). Smooth scrolling operates at a rate of 6 lines per second, synchronized to the display's 60 Hz frame refresh rate (or 50 Hz in some configurations), where the video processor shifts screen content one scan line at a time over 10 frames to simulate fluid upward movement and minimize visual flicker during line feeds. Split-screen functionality is enabled through scrolling region definitions, allowing the host to specify top and bottom margins (e.g., via DECSTBM sequence) for independent vertical scrolling in a subset of the 24-line display area, useful for dividing the screen into status and content zones while maintaining full-screen resolution. Cursor control supports both absolute addressing, positioning the cursor to any row and column (1-based indexing from 1,1 at top-left) using the ANSI-standard CUP escape sequence, and relative movements such as up (CUU), down (CUD), forward (CUF), or backward (CUB) by a specified number of units, enabling precise navigation without redrawing the entire screen. For input processing, the VT100 operates in local mode by default, where keystrokes are buffered and echoed to the screen for immediate visual , supporting interactive without constant host polling. Local editing modes permit operations like character insertion (ICH), deletion (DCH), line insertion (), and line deletion (), applied within defined margins to modify text blocks autonomously before transmission to the host. The audible bell, integrated into the keyboard assembly as a small piezoelectric , emits a 800 Hz tone lasting 0.25 seconds in response to the BEL (07 hex), serving as an aural cue for alerts, errors, or line-end notifications. input relies on a matrix of mechanical switches scanned by the , which maps detected scan codes to corresponding 7-bit ASCII values (or NRCS equivalents), with support for 3-key rollover to handle simultaneous presses reliably and auto-repeat for held keys at approximately 30 characters per second. Visual attributes enhance character rendering for emphasis, with the base configuration limited to reverse video, where selected text inverts polarity to appear as dark characters on a background (or vice versa, depending on setup). The Advanced Video Option (AVO) expands this by adding dedicated attribute memory, enabling underline (a line beneath characters), blink (flashing at 1-2 Hz), and bold (increased intensity via dot duplication), applied selectively via the SGR ANSI without affecting adjacent text. These attributes are stored per character cell in the 2K-byte screen RAM (expanded to 3K with AVO), ensuring persistent display until reset, and the VT100 supports ANSI escape codes for their invocation and selective erasure.

Control Sequences and Protocols

The primarily implemented the ANSI X3.64-1977 standard for control functions, which served as a precursor to the later ISO 6429 and ECMA-48 standards, enabling a structured for terminal operations such as cursor movement and screen formatting. This protocol used escape sequences beginning with the (ESC, ASCII 27) followed by parameters and terminators, allowing host systems to issue precise instructions to the terminal's . In ANSI mode, the VT100 processed these sequences to manage display attributes, editing functions, and input transmission, ensuring compatibility with emerging industry standards for video terminals. A key element of the protocol was the Control Sequence Introducer (CSI), denoted as ESC [, which introduced parameterized commands for advanced features unavailable in earlier terminals. For instance, cursor positioning employed the CUP (Cursor Position) sequence ESC [ Pn ; Pm H, where Pn specified the row and Pm the column (both defaulting to 1 if omitted), enabling direct addressing within the 24x80 or 24x132 display grid. Screen clearing used the ED (Erase in Display) sequence, such as ESC [ 2 J to erase the entire screen from the cursor position onward, while attribute settings via the SGR (Select Graphic Rendition) sequence like ESC [ 1 m activated bold text (with 0 resetting attributes). These CSI-based sequences provided a flexible, extensible framework that influenced subsequent terminal emulators and protocols. For , the VT100 included a full mode, activated by the host sending [ ? 2 l (resetting DEC ANSI Mode), which limited the terminal to interpreting only VT52-style escape sequences and restricted the display to 24 rows by 80 columns. In this mode, simpler non-parameterized sequences handled basic operations, such as A for cursor up, B for cursor down, and Y Pl Pc for direct cursor addressing (where Pl and Pc were line and column values offset by 32). To exit mode and return to ANSI operation, the host issued <, restoring access to the full feature set. This dual-mode support allowed legacy software designed for the earlier to function without modification, though advanced VT100 capabilities like extended attributes were unavailable during . Error handling in the VT100 firmware emphasized robustness, ignoring invalid control sequences by displaying a checkerboard error character and terminating the parse with control characters like CAN (ASCII 24) or SUB (ASCII 26). Embedded invalid characters within a sequence triggered immediate execution of prior valid portions, preventing total failure. Additionally, users could select the default protocol (ANSI or ) through the terminal's setup menu in local mode, accessed by pressing the SET-UP key, where SET-UP feature group B, switch 3 toggled between modes (0 for , 1 for ANSI), with the choice saved in non-volatile for persistence across power cycles. This combination of standards-compliant sequences and forgiving contributed to the VT100's reliability in diverse environments.

Options and Variants

Optional Enhancements

The VT100 could be enhanced through modular add-on options, primarily in the form of plug-in circuit boards installed via the rear panel access cover, allowing users to customize the terminal for specific needs without requiring a full model upgrade. The VT1XX-AB Advanced Video Option (AVO) was a key enhancement that expanded display capabilities beyond the base model's 24 lines by 80 columns, adding support for a 132-column mode (24 lines by 132 columns) through additional display memory and a second character generator ROM. This option also introduced advanced character attributes, including reverse video (dark characters on a light background), bold, blink, and underline, selectable via Select Graphic Rendition (SGR) escape sequences such as parameter 7 for reverse video. Installation involved mounting the board onto the terminal controller in the leftmost slot using standoffs, with power disconnected, followed by a self-test checkout using the SET-UP key or escape sequence ESC # 8 to verify the expanded display. The VT1XX-AA 20 mA Option provided compatibility with legacy teletype systems by enabling a interface as an alternative to the base , supporting direct host connections over longer distances without a . It operated in passive (20 mA current, minimum 5.0 V open circuit) or active (17 V ±5% with 660 ohms) modes, configurable via switches on the board for transmit and receive functions, and was installed by connecting the P5 connector to J5 on the controller, accessible through the rear panel. Checkout used a data test with ESC [ 2 ; 2 y, displaying "WAIT" during the approximately six-second process, with errors indicated numerically. Additional options included the VT1XX-AC Serial Printer Interface, which added a dedicated for connecting serial printers to capture screen output for hardcopy. Setup customization was facilitated by nonvolatile (NVRAM), allowing users to save and recall configurations—such as answerback messages up to 20 characters—via SHIFT+S for save and SHIFT+R for recall in SET-UP mode, ensuring persistent settings across power cycles. Firmware updates for these enhancements were handled through DEC service procedures, though the options themselves relied on the terminal's existing ROM-based control sequences.

Model Variants

The VT100 series encompassed several official variants developed by (DEC), each integrating distinct hardware modifications to address specialized user needs while preserving core compatibility with ANSI X3.64 escape sequences and VT52 protocols. These models expanded the base VT100's 14-inch monochrome display, 8080 microprocessor, and interface by adding features like graphics processing, printing support, or embedded computing, with releases spanning from 1979 to 1982. The VT101 functioned as the entry-level monochrome variant, omitting the optional printer port of higher models to reduce costs while retaining essential VT100 attributes such as an 80-column by 24-line , 7x9 dot-matrix characters, and non-volatile setup for baud rates up to 19,200. Introduced around 1981, it targeted budget-conscious deployments in commercial and educational settings, with a detachable and no expansion slot for add-ons. Building on the VT101, the VT102 incorporated the Advanced Video Option (AVO) board and a printer port as standard features, enabling local print screen functionality to capture and output screen content directly to an attached printer. Released in , this variant also supported insert/delete line operations and half-duplex protocols, making it ideal for enhanced and office environments without requiring post-purchase upgrades. The VT105 augmented the VT100 with dedicated waveform graphics hardware compliant with the IEEE-502 standard, facilitating simple plotting and oscilloscope-style visualizations on its 80x24 alphanumeric grid overlaid with a 230x512 dot graphics plane. Announced in late , it included a specialized M7071 graphics module for generating basic waveforms and curves, primarily serving scientific and applications like instrumentation interfaces. DEC's VT125, launched in 1981, introduced ReGIS support tailored for the Professional 300 series workstations, featuring a architecture with 768x240 , four selectable colors from a palette of 64, and four video attributes (bold, blink, reverse video, and underline). This model retained VT100 text handling but added a for lines, arcs, and text in format, enabling interactive illustrations and CAD-like operations. Additional variants addressed niche requirements: the VT131, released in 1981, optimized for data entry with block mode transmission, protected fields, and local editing buffers to streamline form-based interactions under VMS environments. The VT103 integrated an LSI-11/23 minicomputer backplane into the VT100 chassis for embedded PDP-11 processing, while the VT180 added a 2 MHz Z80 CPU and 64 KB RAM for standalone CP/M execution with floppy disk support. The VT278, introduced in 1981 as DECmate-compatible, merged a PDP-8/E-equivalent using a Harris HD6120 CMOS processor with VT100 I/O, supporting word processing and basic computing via integrated RX02 floppy drives.

Legacy and Emulation

Influence on Computing Standards

The VT100, introduced by in 1978, played a pivotal role in establishing ANSI X3.64 as the for terminal control sequences by being the first widely adopted terminal to implement it comprehensively. Its popularity contributed to over six million terminals sold in the VT series overall, with the VT100 reaching one million units by 1985, demonstrated the practicality of these sequences for cursor control, editing, and display management, encouraging software developers and hardware manufacturers to align with the standard. This widespread implementation helped ANSI X3.64 gain traction beyond its initial 1977 publication, influencing international harmonization efforts. The VT100's adherence to ANSI X3.64 directly contributed to the evolution of related global standards, including ECMA-48 (second edition, August 1979) and ISO/IEC 6429 (1983), which adopted and refined the same set of escape sequences for coded character sets and control functions. These standards, essentially equivalents in their core provisions for terminal behavior, built on the ANSI framework to ensure across diverse environments, with the VT100 serving as a practical reference for compliance testing and implementation. By providing an affordable, microprocessor-controlled serial video terminal, the VT100 accelerated the industry's transition from impact printers and block-mode systems like IBM's 3270 to character-oriented, ASCII-based video displays, enabling more interactive and efficient user interfaces in multi-user systems. This shift reduced reliance on print-centric workflows and promoted screen updates, fundamentally altering how data was visualized and manipulated in enterprise computing during the late 1970s and 1980s. In the Unix and TCP/IP ecosystems, the VT100 became the foundational model for terminal emulation, directly inspiring the emulator developed for the in the early 1980s to support remote sessions over networks. Its control sequences were integral to protocol implementations, allowing standardized character-stream communication across and early hosts, which facilitated the growth of in academic and research settings. The enduring legacy of the VT100 lies in its establishment of conventions for text-based interfaces that persist in modern console applications and operating system shells, where ANSI-derived escape sequences remain the norm for formatting and navigation. Later enhancements in the VT200 series extended these capabilities, further solidifying the lineage of standards-compliant terminals.

Modern Emulation and Usage

In contemporary computing, the VT100 remains emulated in popular terminal software to ensure compatibility with legacy protocols and modern workflows. The xterm emulator, part of the X Window System, provides comprehensive support for VT100 escape sequences, including those from the Advanced Video Option (AVO) such as underline, bold, and 132-column modes, making it a standard choice for Unix-like environments. PuTTY, a widely used SSH and Telnet client, fully emulates VT100 functionality, including cursor controls and character attributes, and is particularly valued for its lightweight design in cross-platform scenarios. Similarly, iTerm2 on macOS supports VT100 sequences alongside extensions from VT220 and ECMA-48 standards, enabling AVO features like enhanced scrolling and display attributes for seamless integration with development tools. VT100 emulation plays a critical role in , particularly for testing and legacy systems. Developers rely on these emulators to verify with older Unix tools that expect VT100 control sequences, such as those in scripts or early curses-based applications. In SSH client configurations, VT100 mode ensures accurate rendering of remote sessions on Unix servers, preventing issues like garbled output from code mismatches. For embedded systems, emulators facilitate of microcontrollers and RTOS environments, where VT100 protocols simulate terminals for validation without physical devices. Hardware recreations of the VT100 persist through open-source projects and enthusiast communities, preserving its functionality in modern contexts. FPGA-based implementations, such as the fpga-vt project, replicate the VT100's serial terminal behavior using programmable logic devices, supporting core features like ASCII rendering and basic controls for educational and retro-computing applications. Vintage restoration efforts, often coordinated in forums like the Vintage Computer Federation, involve repairing original VT100 units or building clones to maintain operational hardware for historical simulations and compatibility testing. As of 2025, the VT100's influence endures in terminal multiplexers and cloud-based interfaces, underpinning tools that extend its legacy into distributed environments. Tmux, a session manager for Unix shells, maintains VT100 compatibility through terminfo definitions, allowing users to multiplex sessions while preserving escape sequence handling for tools like vim and top. Web-based consoles in cloud platforms, such as those using Flynet Viewer, emulate VT100 for browser-accessible connections to Unix and VMS systems, supporting AVO-enhanced displays in remote administration and DevOps pipelines. This ongoing adoption highlights the VT100's foundational role in the ANSI escape code standard, ensuring interoperability across virtualized infrastructures.

References

  1. [1]
    Digital's Video Terminals - VT100.net
    Jun 12, 1999 · The VT05 was the first video terminal manufactured by Digital, introduced in 1970. This was not much more than a video teletype, receiving and transmitting at ...
  2. [2]
    The DEC VT100 Terminal - Columbia University
    Mar 22, 2021 · The Digital Equipment Corporation VT100 was the first ANSI X3.64 compliant terminal and featured lots of innovations including control by an Intel 8085 ...
  3. [3]
    Video Display Terminal Information
    VT100.net. This site is dedicated to the range of video terminals produced by Digital Equipment Corporation (DEC) from 1970 to 1995.
  4. [4]
    Module assembly and manufacturing areas at the Maynard Mill
    Computer History Museum. Module assembly and manufacturing areas at the Maynard Mill. Also includes shots of the PDP-11/34 and VT100.
  5. [5]
    Digital Equipment VT100 - School of Computer Science
    Model: VT100 ; Release Date: 1978 ; Cost at release: USD $1,195 (CAD ~$6,250 adjusted for inflation) ; MIPS: 0.29 (290 KIPS) ; CPU: Intel 8080 microprocessor ...
  6. [6]
    https://www.bitsavers.org/pdf/datapro/alphanumeric_terminals/Datapro_C25_Digital.pdf
  7. [7]
    DEC VT100 - Department of Computer Science, University of York
    Ultimately, over six million terminals in the VT series were sold, based largely on the success of the VT100. These terminals live on in Linux and OSX as the ' ...
  8. [8]
    [PDF] Asynchronous Display Terminal Market - INPUT iCenter
    bulk coming from Model 85 sales most of the balance coming from peripherals sales. Based on $8 million in 83 sales, ap- proximately 4.500 units were sold in.<|separator|>
  9. [9]
    Internet History - freesoft.org
    Users did their work using DEC VT-100 terminals. FORTRAN was the word of the day. Few companies had Internet access, relying instead on SNA and IBM mainframes.Missing: revenue | Show results with:revenue
  10. [10]
    History of Unix - Wikipedia
    1980s. edit. LSI ADM-3A terminal, physical interface for BSD Unix. The DEC VT100 terminal, widely used for Unix timesharing · USENIX 1984 Summer speakers.
  11. [11]
    Digital VT100 (1978) - Oldcomputr.com
    Dec 10, 2015 · It cost $1195, and on the same page there's an ad for the VT100 at $1550. That makes a total of $2745, that according to usinflationcalculator.Missing: Equipment | Show results with:Equipment
  12. [12]
    The 3270 terminal: a mainframe icon | Bob Thomas posted on the topic
    Jun 8, 2025 · And by the late 70's the display part of the 3270 cost around $4500 and the keyboard was another $1100 or so. The display weighed about 40 or ...Missing: 1980s | Show results with:1980s
  13. [13]
    [PDF] series technical manual - Bitsavers.org
    The following VTlOO DECscope video terminal hardware ... In local mode the keyboard remains active and all characters typed are placed on the screen.
  14. [14]
    VT100 Technical Manual Chapter 1: Introduction and Specifications
    VT100 Specifications · Monitor. Height, 36.83 cm (14.5 inch) · Keyboard. Height, 8.89 cm (3.5 inch) · Weight. Monitor, 13.6 kg (30 lb) · Operating. Temperature, 10° ...Missing: memory | Show results with:memory
  15. [15]
    Chapter 2 Installation, Interface Information and Specifications
    The terminal interfaces to the line with a 25-pin connector mounted on the back of the terminal which meets the requirements of EIA specification RS-232-C.
  16. [16]
    [PDF] DEC VT100 terminal - Bitsavers.org
    The VT100 terminal user guide covers keyboard controls, setup mode, setup features, self-testing, and what to do in case of a problem.
  17. [17]
    VT100 Technical Manual Chapter 4: Terminal Description
    Summary of each segment:
  18. [18]
    Chapter 4 VT100 Options
    The specifications for the 20 mA Current Loop Option are located in Chapter 2 of this manual under interface information. 20 mA Current Loop Option Installation.
  19. [19]
    VT100 - Computer History Wiki
    Aug 11, 2023 · The VT100 was a very popular RS-232 based dumb video terminal introduced by DEC in 1978. It featured cursor keys, and the ability to place text wherever the ...
  20. [20]
    Chapter 3 Programmer Information - VT100.net
    Cursor Control – The keyboard also contains four keys labeled with arrows in each of four directions. These keys transmit control sequences. If the host echoes ...
  21. [21]
    Terminals & Printers Handbook Appendix B - VT100.net
    VT52 Compatible Mode. Set and Reset Modes. Name, Sequence. Enter ANSI mode, ESC < ... ESC Y Pl Pc ‡. Reverse line feed, ESC I. † Same when sent from the terminal ...
  22. [22]
    [PDF] EK-VT100-UG-002_VT100_User_Guide_Jan79.pdf - Bitsavers.org
    VT1XX-AA. VT1XX-AB. 20 rnA Current Loop Option. Advanced Video Option. In the future. additional options will be available which will further enhance the basic ...
  23. [23]
    VT101, VT102 and VT131 Video Terminals - VT100.net
    The block mode environment lets you locally edit data before transmitting it to the host. Designed for a variety of data entry applications, the nonupgradeable, ...
  24. [24]
    DEC VT102 - Terminals Wiki
    Jul 15, 2022 · The DEC VT102 terminal is a variant of the VT100 that includes the advanced video option, but lacks the expansion slot of the VT100 as a cost reduction measure.
  25. [25]
    [PDF] vt105 graphic terminal technical manual - Bitsavers.org
    1.1. INTRODUCTION. The VT105 Graphic Terminal is a video terminal that features alphanumeric and graphical display. When interfaced to a host computer, the ...
  26. [26]
    Terminals & Printers Handbook Chapter 7 - VT100.net
    The VT125 Graphics Terminal is a VT100 text terminal with a factory installed Graphics Option. Other options are listed below. Part Number, Description. VT1XX- ...Missing: enhancements | Show results with:enhancements<|control11|><|separator|>
  27. [27]
    [PDF] VT125 - Bitsavers.org
    Many of the terminal's SET-UP features change how the terminal commu- nicates with the computer. Detailed information on communication and re- lated SET-UP ...
  28. [28]
    DEC VT103 - Terminals Wiki
    Jun 7, 2019 · The DEC VT103 terminal is a variant of the VT100 that contains an LSI-11 backplane in the terminal. With a suitable choice of cards, ...
  29. [29]
    DEC VT180 - terminals-wiki.org
    Jun 7, 2019 · The DEC VT180 is a DEC VT100 terminal with the ability to run local CP/M programs on an integrated Mostek MK3880N (Z80 compatible) microprocessor.
  30. [30]
    DEC VT278 - terminals-wiki.org
    May 7, 2020 · The DEC VT278, also known as the DECmate, is a combination of a PDP-8/E and a DEC VT100. The PDP-8/E is implemented via the Harris HD2160 CMOS microprocessor ...
  31. [31]
    ANSI X3.64 standard
    Oh, by the way, the equivalent ISO standard is DP-6429, and ECMA-48 is the European Computer Manufacturers Association version. .....RSS ANSI Standard (X3.64) ...
  32. [32]
    xterm(1) - invisible-island.net
    VT100 and VT102 emulations are commonly equated, though they actually differ. The VT102 provided controls for inserting and deleting lines. Similarly, "ansi" ...
  33. [33]
    Need Terminal Emulator with VT100 support for legacy controls
    Sep 23, 2024 · PuTTY provides VT100 support. 1- Download available from Download PuTTY - a free SSH and telnet client for Windows 2- Change terminal keyboard settings to ...
  34. [34]
    Feature Reporting Spec - iTerm2 - macOS Terminal Replacement
    Terminal emulators supporting this protocol must, at a minimum, support the features in this section as specified. These come from VT100, VT220, ECMA-48, and ...Missing: AVO | Show results with:AVO
  35. [35]
    Implementing VT100 Terminal Emulation with PiDP-11
    Nov 22, 2022 · The main trick is to use PuTTY to access the RT-11 simulator because it can properly emulate a VT100 terminal.Missing: support | Show results with:support
  36. [36]
    Does PuTTy work correctly with ANSI/VT100 escape sequences?
    Mar 25, 2013 · Putty does not handle all of VT100 right. It sends garbage for all function keys other than F1/F2/F3 and does not handle a variety of the other interfacing ...how to send CTR+I sequence in VT100 / putty - Stack OverflowWhere does PuTTY and VT100 start row and column? - Stack OverflowMore results from stackoverflow.com
  37. [37]
    ANSI terminal emulators for linux| page 2 - EmbeddedRelated.com
    Nov 2, 2016 · posts 11-20 - I use multiple instances of TeraTerm in Windows to provide ANSI/VT100 emulation for embedded processor diagnostics using serialMissing: legacy | Show results with:legacy
  38. [38]
    howardjones/fpga-vt: VT100-style terminal implemented on ... - GitHub
    This is a project to implement a DEC VT100 style serial terminal entirely in an FPGA (aside from a few supporting components).
  39. [39]
    DIGITAL Terminals | Vintage Computer Federation Forums
    Aug 12, 2012 · I also have a working VT100. This could be an interesting project. Anyone know where to find the pinout for the VT100 card bus?<|separator|>
  40. [40]
    How can I find the valid values for TERM to use in tmux?
    Jan 25, 2013 · This package contains terminfo data files to support the most common types of terminal, including ansi, dumb, linux, rxvt, screen, sun, vt100, ...TERM ANSI escape sequences compatibility between xterm and ...What's the difference between various $TERM variables?More results from unix.stackexchange.com
  41. [41]
    Web Based VT100, VT220 and VT320 Terminal Emulator - Flynet
    Web based, cloud enabled UNIX terminal emulator- works with VT100, VT220, VAX, VMS, WYSE, PICK and MultiValue.