| 摘要 |
<p>PURPOSE:To enable a processing without making a read operation wait even if reading is executed in the same address before writing is terminated by always comparing the address of data in a FIFO buffer with the address at the time of reading data and directly outputting data corresponding to the coincident address. CONSTITUTION:A microprocessor 1 consists of CPU 2, a read buffer 3, a selector 4, FIFO 5 including buffers 6-13 and comparators 14-17 in accordance with a main memory 18. When a read operation to CPU 2 occurs in the same address as the address of data in FIFO 5, reading for the main memory 18 is stopped by the coincidence signal outputted by the comparators 14-17 corresponding to the buffers 6-13, and the data in FIFO 5 is directly outputted through the switching operation of the selector 4 selecting the read data. Then, the data in FIFO 5 is written into the main memory 18 and the data is altered.</p> |
