An individual ising device connected to common buses includes neuron circuits, a memory, and a router. The memory holds connection destination information per neuron circuit. An individual item of connection destination information includes first address information identifying one of a plurality of connection destination neuron circuits of a neuron circuit and second address information identifying a first ising device including at least one of the connection destination neuron circuits, the first and second address information being correlated. The router supplies, when an output signal of a connection destination neuron circuit changes and when the router receives the first address information identifying this connection destination neuron circuit via a bus, an update signal based on the changed output signal to one of the neuron circuits in accordance with the received first address information, the previously specified second address information identifying the first ising device, and the connection destination information.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. An information processing apparatus comprising: a plurality of ising devices connected to common buses; and a control device, wherein each of the plurality of ising devices includes: a plurality of neuron circuits, each of which calculates a first value based on a sum of values, each of which is obtained by multiplying an output signal of one of a plurality of connection destination neuron circuits by one of a plurality of weight values that indicate connection strength with the respective connection destination neuron circuits, outputs 0 or 1 in accordance with a result of comparison between a second value obtained by adding a noise value to the first value and a threshold, and updates, upon receiving an update signal when one of the output signals changes, the first value in accordance with the update signal, a memory that holds items of connection destination information for each of the plurality of neuron circuits, each of the items of connection destination information including an item of first address information identifying one of the plurality of connection destination neuron circuits and an item of second address information identifying, among the plurality of ising devices, a first ising device including at least one of the plurality of connection destination neuron circuits, the first and second address information being associated with each other, and a router that supplies, when a first output signal of a first connection destination neuron circuit among the plurality of connection destination neuron circuits that is included in the first ising device changes and when the router receives the first address information identifying the first connection destination neuron circuit via one of the buses, the update signal based on a value of the changed first output signal transmitted via one of the buses to one of the plurality of neuron circuits in accordance with the received first address information, previously specified second address information identifying the first ising device, and the connection destination information, and wherein the control device specifies the second address information identifying the first ising device including the first connection destination neuron circuit that allows change of the first output signal. 2. The information processing apparatus according to claim 1, wherein, when the first output signal of the first connection destination neuron circuit changes, the router included in the first ising device supplies the changed value of the first output signal and the first address information identifying the first connection destination neuron circuit to the buses. 3. The information processing apparatus according to claim 1, wherein each of the plurality of ising devices includes a storage unit holding a same second address information specified by the control device. 4. The information processing apparatus according to claim 1, wherein the plurality of ising devices include a second ising device including a memory in which connection destination information is stored, and wherein, in the connection destination information, the first address information identifying the first connection destination neuron circuit included in the first ising device is associated with identification information used inside the second ising device. 5. The information processing apparatus according to claim 1, wherein a plurality of connection destination neuron circuits of a plurality of neuron circuits arranged in a third ising device among the plurality of ising devices include a plurality of second connection destination neuron circuits of the plurality of neuron circuits included in the third ising device and a plurality of third connection destination neuron circuits included in one or a plurality of fourth ising devices among the plurality of ising devices, and wherein a number of the third connection destination neuron circuits is less than a number of the second connection destination neuron circuits. 6. An ising device comprising: a plurality of neuron circuits, each of which calculates a first value based on a sum of values, each of which is obtained by multiplying an output signal of one of a plurality of connection destination neuron circuits by one of a plurality of weight values that indicate connection strength with the respective connection destination neuron circuits, outputs 0 or 1 in accordance with a result of comparison between a second value obtained by adding a noise value to the first value and a threshold, and updates, upon receiving an update signal when one of the output signals changes, the first value in accordance with the update signal; a memory that holds items of connection destination information for each of the plurality of neuron circuits, each of the items of connection destination information including an item of first address information identifying one of the plurality of connection destination neuron circuits and an item of second address information identifying, among a plurality of ising devices connected to common buses, a first ising device including at least one of the plurality of connection destination neuron circuits, the first and second address information being associated with each other; and a router that supplies, when a first output signal of a first connection destination neuron circuit among the plurality of connection destination neuron circuits that is included in the first ising device changes and when the router receives the first address information identifying the first connection destination neuron circuit via one of the buses, the update signal based on a value of the changed first output signal transmitted via one of the buses to one of the plurality of neuron circuits in accordance with the received first address information, previously specified second address information identifying the first ising device, and the connection destination information. 7. A control method for an information processing apparatus, the control method comprising: preparing a plurality of ising devices, each of which includes a plurality of neuron circuits, each of which calculates a first value based on a sum of values, each of which is obtained by multiplying an output signal of one of a plurality of connection destination neuron circuits by one of a plurality of weight values that indicate connection strength with the respective connection destination neuron circuits, outputs 0 or 1 in accordance with a result of comparison between a second value obtained by adding a noise value to the first value and a threshold, and updates, upon receiving an update signal when one of the output signals changes, the first value in accordance with the update signal, a memory that holds items of connection destination information for each of the plurality of neuron circuits, each of the items of connection destination information including an item of first address information identifying one of the plurality of connection destination neuron circuits and an item of second address information identifying, among a plurality of ising devices connected to common buses, a first ising device including at least one of the plurality of connection destination neuron circuits, the first and second address information being associated with each other, and a router that supplies, when a first output signal of a first connection destination neuron circuit among the plurality of connection destination neuron circuits that is included in the first ising device changes and when the router receives the first address information identifying the first connection destination neuron circuit via one of the buses, the update signal based on a value of the changed first output signal transmitted via one of the buses to one of the plurality of neuron circuits in accordance with the received first address information, previously specified second address information identifying the first ising device, and the connection destination information; and specifying, by a control device, the second address information identifying the first ising device including the first connection destination neuron circuit that allows change of the first output signal.