Difference between revisions of "Over the back"
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On the board edge opposite to the 'fingers' which plug into the backplane, a [[flat cable]], or in some cases a small [[printed circuit board]], with a pair of connectors plugs into [[Berg connector]]s each board. | On the board edge opposite to the 'fingers' which plug into the backplane, a [[flat cable]], or in some cases a small [[printed circuit board]], with a pair of connectors plugs into [[Berg connector]]s each board. | ||
| − | In a few cases (e.g. [[PDP-8]] [[main memory]]), instead of connectors, the back edge of the boards ''also'' has contact fingers, and what is effectively a small plug-on backplane is used to connect the cards. | + | In a few cases (e.g. [[PDP-8 family|PDP-8]] [[main memory]]), instead of connectors, the back edge of the boards ''also'' has contact fingers, and what is effectively a small plug-on backplane is used to connect the cards. |
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[[Category: Components]] | [[Category: Components]] | ||
Revision as of 21:34, 22 November 2019
Over the back or over the top are terms used to describe an alternative connectivity path between two more more boards plugged into a backplane; i.e. not using the bus carried by the backplane.
On the board edge opposite to the 'fingers' which plug into the backplane, a flat cable, or in some cases a small printed circuit board, with a pair of connectors plugs into Berg connectors each board.
In a few cases (e.g. PDP-8 main memory), instead of connectors, the back edge of the boards also has contact fingers, and what is effectively a small plug-on backplane is used to connect the cards.
