| 摘要 |
PURPOSE:To simplify the diagnosing procedur of hardware with high efficiency, by securing an optional operation fo the parity bit. CONSTITUTION:An operated including a parity bit P is set to an input register 1, and an operand of one byte is set to an input register 2 of the other side. These outputs receive an arithmetic operation by a selection circuit 5, an arithmetic circuit 7, a selection circuit 13, a parity producing circuit 6, an output register 4, a selection circuit 15, etc. During the diagnosis of hardware, etc., the data bit in the reigster 1 is directly set to an output register 4 in the form of an output data bit. For the parity bit, however, the result obtained through a logical arithmetic carried with the specific bit of the contents of the register 2 is set to the register 4 in the form of an output parity bit. Accordingly, the output parity bit can be freely operated by the data which is applied to the register 2. |
