IBM remote batch terminals

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The IBM 2780 and the IBM 3780 are devices developed by IBM for performing remote job entry (RJE) and other batch functions over telephone [lower-alpha 1] lines; they communicate with the mainframe via Binary Synchronous Communications (BSC or Bisync) and replaced older terminals using synchronous transmit-receive (STR). In addition, IBM has developed workstation programs for the 1130, 360/20, 2922, System/360 other than 360/20, System/370 and System/3.

Contents

2780 Data Transmission Terminals

The 2780 Data Transmission Terminal first shipped in 1967. [1] It consists of:

The 2780 is capable of local (offline) card to print operation.

It comes in four models: [3]

The 2780 uses a dedicated communication line at speeds of 1200, 2000, 2400 or 4800 bits per second. It is a half duplex device, although full duplex lines can be used with some increase in throughput. It can communicate in Transcode (a 6-bit code), 8-bit EBCDIC , or 7-bit ASCII .

2770 Data Communication System

The 2770, announced in 1969, "was said to surpass all other IBM terminals in the variety of available input-output devices." [4] The 2770 was developed by the IBM General Products Division (GPD) in Rochester, MN. [5]

It comes standard with a desktop terminal with keyboard. The printer and other devices (any two in any combination) can be attached to the 2772 Multi-Purpose Control unit. [6] Possible devices include: [7]

3780 Data Communications Terminal

IBM 3780 Data Communications System IBM 3780.tif
IBM 3780 Data Communications System

In May 1972, IBM announced the IBM 3780, an enhanced version of the 2780. [8] The 3780 was developed by IBM's Data Processing Division (DPD). [9] There is one model, with an optional card punch.

The 3780 drops Transcode support and incorporates several performance enhancements. It supports compression of blank fields in data using run-length encoding. It provides the ability to interleave data between devices, introduces double buffering, and adds support for the Wait-before-transmit ACKnowledgement (WACK) and Temporary Text Delay (TTD) Binary Synchronous control characters. [10]

The IBM 2780 and 3780 were later emulated on various types of equipment, including eventually the personal computer. A notable early emulation was the DN60, by Digital Equipment Corporation in the late 1970s. [12]

3770 Data Communications System

In 1974 IBM Data Processing Division (DPD) offered a successor to the 3780, called the 3770 Data Communications System, supporting SDLC, BSC, BSC Multi-leaving [13] and SNA, depending on the configuration. [14] The 3770 is a family of desk console style terminals that offers a variety of keyboard and printer combinations as well as I/O equipment attachment and communications features.

The terminals come built into a desk and include the following models: [15]

The following I/O devices can be attached to a 3770 terminal:

Workstation programs

IBM distributes workstation programs with systems software including

Except for the RJE workstation programs in OS/360, these programs use a variation of BSC known as Multi-leaving. [13] In addition, IBM provides separately ordered workstation programs using BSC. Systems Network Architecture (SNA) and TCP/IP.

Workstation programs are available from IBM and third-party vendors to support all of these protocols:

Notes

  1. They used different adapters for dial and leased lines.

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<span class="mw-page-title-main">IBM 1442</span> IBM card reader and punch

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<span class="mw-page-title-main">IBM 1130</span> 16-bit IBM minicomputer introduced in 1965

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Binary Synchronous Communication is an IBM character-oriented, half-duplex link protocol, announced in 1967 after the introduction of System/360. It replaced the synchronous transmit-receive (STR) protocol used with second generation computers. The intent was that common link management rules could be used with three different character encodings for messages.

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<span class="mw-page-title-main">OS/VS1</span> IBM operating system

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<span class="mw-page-title-main">RCA Spectra 70</span> Mainframe computer series, 1960s-1970s

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<span class="mw-page-title-main">IBM 3767</span>

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<span class="mw-page-title-main">IBM 1050</span> Hardcopy computer terminal released by IBM in 1963

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<span class="mw-page-title-main">Punched card input/output</span> Computer peripheral device

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<span class="mw-page-title-main">MDS 2400</span> Early electrical communications computer

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Six-Bit Transcode, or Six-Bit Transmission Code, was, for a few years, one of the three character sets used by IBM for Binary Synchronous Communications. Transmission using 6-bit Transcode had higher throughput than transmission using 8-bit EBCDIC or ASCII, provided that the data to be transmitted used a limited set of 48 characters.

<span class="mw-page-title-main">IBM System/360 Model 20</span> Low-end IBM computer model from 1960s

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The IBM 2922 Programmable Terminal is a Remote Job Entry (RJE) terminal introduced by IBM in 1972. The 2922 communicates using Binary Synchronous Communications (Bisync).

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The IBM 1017 is a table-top paper tape reader from IBM introduced in 1968.

<span class="mw-page-title-main">IBM 1443</span> Medium speed line printer

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<span class="mw-page-title-main">IBM 3505</span> IBM computer peripherals

The IBM 3505 is a reader for 80-column punched cards. It can read cards punched in EBCDIC or column binary at up to 1200 cards per minute (CPM). The IBM 3525 is a multi-function punched card device, capable of reading, punching, and printing on punched cards. The 3505 contains an integrated control unit that attaches to a System/370 byte multiplexer, selector, or block multiplexer channel. An optional feature of the 3505 allows the control unit to also control a 3525, although the two are separately-addressed devices.

References

  1. IBM Corporation (23 January 2003). "Rochester chronology". Archived from the original on March 28, 2008. Retrieved June 3, 2012.
  2. IBM 1443 printer description
  3. IBM System/370 System Summary (PDF) (Seventh ed.), IBM, December 1976, p. 8-12, GA22-7001-6
  4. Pugh; et al. (1991). IBM's 360 and Early 370 Systems . The MIT Press. ISBN   0-262-16123-0.
  5. "IBM Archives: Rochester Chronology". 23 January 2003. Archived from the original on March 28, 2008. Retrieved June 24, 2012.
  6. IBM Corporation. IBM Field Engineering Announcement: The IBM 2770 Data Communication System (PDF).
  7. IBM Corporation (1969). System Components IBM 2770 Data Communication System (PDF). Retrieved June 16, 2024.
  8. "IBM Archives: DPD chronology, page 4". IBM. 23 January 2003. Archived from the original on October 23, 2009. Retrieved 2007-01-18.
  9. "IBM Archives: DPD Chronology". 23 January 2003. Archived from the original on October 23, 2009. Retrieved June 24, 2012.
  10. Hewlett Packard. "RJE/XL Node Manager's Guide". Archived from the original on March 4, 2016. Retrieved June 7, 2012.
  11. IBM Corporation (1979). IBM Sales Manual: DP Machines (PDF).
  12. Maintenance manual for the DN60 series, includes an overview of BISYNC
  13. 1 2 "Appendix B MULTI-LEAVING" (PDF). OS/VS2 HASP II Version 4 Logic - Program Number 370H-TX-001 VS2 - SVS Release 1.7 (PDF) (First ed.). IBM. September 15, 1976. pp. 7-59–7-68. GY27-7255. Retrieved March 17, 2022.
  14. Frank, Ronald A. (June 25, 1975). "IBM 3770 Performance, Savings, Please Service Firm". Computerworld. Retrieved June 23, 2012.
  15. IBM System/370 System Summary (PDF) (Seventh ed.), IBM, December 1976, p. 8-40, GA22-7001-6
  16. IBM System/360 Operating System Remote Job Entry Program Number 360S-RC-536 (PDF) (Third ed.). IBM. November 1968. C30-2006-2. Retrieved December 23, 2021.

External References