| 摘要 |
<p>When data are transferred from a host CPU (14) to a sound processor (24) which reproduces music sounds on a real-time basis, the burden on the host CPU (14) is greatly reduced. Upon transfer of music sound data from the host CPU (14) as a transfer source, the host CPU (14) and a DMAC (44) handle a data size of 2560 words that is greater than the storage capacity of 256 words of buffer memories (41, 42). After music sound data have been transferred to one of the buffer memories (41) until it becomes full of the data, the sound processor (24) temporarily suspends the transfer of the data. When music sound data in the other buffer memory (42) are reproduced by the sound processor (24) and the buffer memory (42) becomes empty, the sound processor (24) sets the empty buffer memory (42) as a transfer destination memory, cancels the temporary suspension of the transfer of the data, and resumes the transfer of the data to the empty buffer memory (42).</p> |
