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Home > Art, Film & Photography > Block-Oriented Terminal: IBM 3270, HP 2640, IBM 5250, IBM 2780-3780, IBM 3179g, Bull Questar
Block-Oriented Terminal: IBM 3270, HP 2640, IBM 5250, IBM 2780-3780, IBM 3179g, Bull Questar

Block-Oriented Terminal: IBM 3270, HP 2640, IBM 5250, IBM 2780-3780, IBM 3179g, Bull Questar


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About the Book

Chapters: Ibm 3270, Hp 2640, Ibm 5250, Ibm 2780/3780, Ibm 3179g, Bull Questar. Source: Wikipedia. Pages: 28. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: The HP 2640A and other HP 264X models were block-mode "smart" and intelligent ASCII standard serial terminals produced by Hewlett Packard using the Intel 8008 and 8080 microprocessors. The HP 2640A was introduced in 1975, and used an Intel 8008 CPU, and was priced at US$3500. At introduction, it could have up to 8 KB of RAM (two 4 KB semiconductor RAM cards). Also introduced in 1975 was the HP 2644A, which was an HP 2640A with mass storage (two mini-tape cartridges), for US$5000. The HP catalogs usually refer to the terminal model as simply "2640A," and infrequently as "HP 2640," or "HP 2640A" (both with a blank after the "HP"), or "2640." The incorrect "HP2640" and "HP2640A" are often seen outside of HP. The functionality defined by the HP 264X series hasn't changed much as the preferred terminal for HP1000 and HP3000 series computers. They never achieved the notoriety of the VT100 among programmers, but included sophisticated features not found in the VT100, such as offline forms, multipages, and (in some models) local storage. The styling looked like vaguely like a toaster oven. It was boxy, with a "widescreen" aspect ratio. HP had determined that the combination of a standard 4:3 aspect ratio with the 25 line by 80 character display that was the standard of the time required the characters to have a very high profile. HP's response was to specify a CRT with an aspect ratio designed around the desired character shape instead of the other way around. Of course, this also mandated rather high manufacturing costs as standard parts could not be used. HP took pains to further improve the rendering of displayed characters via half-pixel positi...http: //booksllc.net/?id=160721


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Product Details
  • ISBN-13: 9781158563036
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • No of Pages: 30
  • Spine Width: 2 mm
  • Weight: 59 gr
  • ISBN-10: 1158563035
  • Publisher Date: 14 Oct 2010
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: IBM 3270, HP 2640, IBM 5250, IBM 2780-3780, IBM 3179g, Bull Questar
  • Width: 229 mm


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Block-Oriented Terminal: IBM 3270, HP 2640, IBM 5250, IBM 2780-3780, IBM 3179g, Bull Questar
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