Patent ID: 6415391
Filing Date: 2002-07-02
Classification: G06F

Abstract:
A system comprising:a connection board; a plurality of circuit packages being detachably connected to said connection board, each of the plurality of circuit packages using start-up setting data for start-up operation; a first package detachably connected to the connection board and comprising: a backup memory for storing the start-up setting data, a disconnection detector for detecting disconnection of the first package from the connection board to produce a disconnection signal, and a state memory for storing one of a first state and a second state such that the second state is normally stored and is changed to the first state when the disconnection signal is produced; and a second package for controlling the plurality of circuit packages and the first package through the connection board, the second package being detachably connected to the connection board and comprising a controller for determining whether the start-up setting data stored in the backup memory is valid by checking which of the first state and the second state is stored in the state memory of the first package.