Browse Prior Art Database

Attachment Option Personal Jumper

IP.com Disclosure Number: IPCOM000045137D
Original Publication Date: 1983-Feb-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 3 page(s) / 58K

Publishing Venue

IBM

Related People

Heneghan, MJ: AUTHOR

Abstract

Displays such as the IBM 3278, 3279 and 8775 use connector strips to interconnect logic cards together and provide internal wiring to connector pins from which internal cableforms are attached and hence signals conveyed to, amongst other places, other connectors on the surface of the display to keyboards, control units, etc.

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Attachment Option Personal Jumper

Displays such as the IBM 3278, 3279 and 8775 use connector strips to interconnect logic cards together and provide internal wiring to connector pins from which internal cableforms are attached and hence signals conveyed to, amongst other places, other connectors on the surface of the display to keyboards, control units, etc.

The use of connector strips results in minimum cost wiring, but does not allow for changes to the internal connections between logic cards without replacing the connector strips with others having different internal wiring.

In displays such as the 8775 there are several alternative attachment options each of which requires a different logic card, all of which plug into the same socket in the display, but because of slightly different internal signal connection requirements need two different types of connector strips and three different types of internal cabling between the connector strips and the external connectors on the surface of the display package.

For low cost manufacturing the use of fixed cables and connector strips is required, but at present once the cabling and connector strips are in place the display is effectively constrained to the host attachment card type for which the cables and strips have been designed. Manufacturing would be greatly assisted by some simple way of converting a display from one attachment type to another by plugging cards or other simple actions not involving removal of connector strips or fixed cables.

For example, in the 8775 five teleprocessing attachment options are provided.

As shown in Fig. 1, all options use the same card socket position. These options...