| 摘要 |
PROBLEM TO BE SOLVED: To provide a device and method for storage device monitoring which performs monitoring of an address bus with a simple structure and low expenses. SOLUTION: A vertical parity operation is performed in a parity operation circuit 40 with data 37 and an address 32 as objects at the time of data writing, the result of vertical parity operation of this 'address + data' is added to writing data 37 as a parity bit 39 and written in a single port memory. 30. At the time of reading the data, the parity bit 39, which is read at the same time as the data 37 read from the single port memory 30, and the vertical parity operation result of a read memory address as the address 32 given to the single port memory 30 held in an address holding circuit 36 and read-out data 37 are compared at a parity comparison circuit 42, and address bus monitoring is performed by notifying it as a monitoring result 41. |
