| 摘要 |
PURPOSE:To set the area of an access address to a storage circuit with a simple firmware and in response to the working state, by qualifying the holding contents of an address holding means in response to the working state storage contents when an address request is given to the storage circuit. CONSTITUTION:An information processor is provided with a working state storage circuit 1, an address register 2, an adder circuit 3 and a storage circuit 4. A firmware stores a working state 10 of the information processor in the circuit 1. The circuit 3 delivers the holding contents of the register 2 to the circuit 4 as they are when the circuit 3 receives no qualification indicating signal 12 from the circuit 1. When the circuit 3 receives the signal 12, a fixed number is added to the upper 2-bit 13 of an access address 11. Then the bits 13 form an access address 15 together with a lower bit 14 of the address 11, and this address 15 is delivered to the circuit 4. |
