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In the years following, various video game consoles and home computers adopted the same connector for their own game ports, though they were not all interoperable. The most common wiring supported five connections for discrete signals (five switches, for up, down, left, and right movement, and a fire button), plus one pair of 100 kΩ ...
For backpropagation, the activation as well as the derivatives () ′ (evaluated at ) must be cached for use during the backwards pass. The derivative of the loss in terms of the inputs is given by the chain rule; note that each term is a total derivative , evaluated at the value of the network (at each node) on the input x {\displaystyle x} :