The Mother Board is located at the end of the card cage and provides the electrical connectors for all boards that are inserted. The Mother Board contains four identically connected edge connectors, three of which are utilized by the three other boards while one position remains empty. Any board can be inserted into any of the four positions for ease of servicing. In addition to its interconnection function for all boards of the system, the Mother Board contains a one-shot which provides power-on reset.
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