| 摘要 |
PURPOSE:To use more efficiently a memory by adding a specific code before and after a data to be changed to prevent competition when the memory is used in common asynchronously and a computer revises the content of the memory. CONSTITUTION:When the compter rewrites the data of the memory MEM, the specific code (SKIP and END) is added before and after the data to be modified and the result is transmitted to a data bus so as to revise the content of the memory. When the specific code SKIP is detected by a decoder section 13, it is transferred to a transfer control section 14, which stops the transfer of data. When the revision of the memory is finished, the decoder section 13 detects the specific code END, gives it to the control section 14, which restarts the data transfer. In this case, an address signal outputted by an address counter section 16 is not affected by the stop of data transfer. Further, the computer can revise optionally the content of memory as required. Thus, the competition of the use of the memory is prevented and the memory is used more efficiently. |
