Browse Prior Art Database

Display Emulation

IP.com Disclosure Number: IPCOM000059607D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Fountain, JW: AUTHOR [+3]

Abstract

Large establishments generally have many workstations, e.g., IBM 3270 terminals (up to 32 in number) which are attached via coaxial cable to a control unit (e.g., IBM 3274 or IBM 3276 unit) in the same building. In turn, the control unit has a single connection to the host computer (generally, a teleprocessing line). If word processing was also a requirement for the large-establishment secretary or principal, another terminal, e.g., an IBM Displaywriter (DW), is necessary in addition to the IBM 3270. The present apparatus allows the IBM Displaywriter to also act as an IBM 3270 attached workstation. This eliminates the need for two terminals. The 3270 display support for the IBM Displaywriter offers a cost and space advantage by allowing the Displaywriter to emulate a 3278 display.

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Display Emulation

Large establishments generally have many workstations, e.g., IBM 3270 terminals (up to 32 in number) which are attached via coaxial cable to a control unit (e.g., IBM 3274 or IBM 3276 unit) in the same building. In turn, the control unit has a single connection to the host computer (generally, a teleprocessing line). If word processing was also a requirement for the large-establishment secretary or principal, another terminal, e.g., an IBM Displaywriter (DW), is necessary in addition to the IBM 3270. The present apparatus allows the IBM Displaywriter to also act as an IBM 3270 attached workstation. This eliminates the need for two terminals. The 3270 display support for the IBM Displaywriter offers a cost and space advantage by allowing the Displaywriter to emulate a 3278 display. This emulation is accomplished by an IBM Displaywriter adapter and 3278 emulation software. The adapter makes the IBM Displaywriter "look like" an IBM 3278 to the IBM 3274 control unit. The emulation software allows the DW to perform all the display and keyboard functions of the IBM 3278 display. In fact, additional functions are offered, such as saving a screen of "3278 data" to be later added to a Displaywriter document. The resulting capability allows the IBM Displaywriter to perform many office functions from a single physical terminal.

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