Data transfer apparatus, data transfer system, and data...

G - Physics – 11 – B

Patent

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G11B 20/10 (2006.01)

Patent

CA 2374984

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).

Lorsque des données sont transférées d'une unité centrale de traitement (UCT) hôte (14) à un processeur de son (24) pouvant lire en temps réel des sons musicaux, l'encombrement de l'UCT hôte (14) s'en trouve considérablement réduit. Une fois les données sonores musicales transférées depuis l'UCT hôte (14) fonctionnant comme source de transfert, l'UCT hôte (14) et un contrôleur d'accès direct mémoire (DMAC) prennent en charge une taille de données de 2560 mots, laquelle est plus grande que la capacité de stockage de 256 mots de mémoires tampons (41, 42). Le transfert de données sonores musicales s'effectue vers l'une des mémoires tampons (41) et, lorsque celle-ci est remplie, le processeur de son (24) suspend temporairement le transfert. Les données sonores musicales dans l'autre mémoire tampon (42) sont lues par le processeur de son (24) qui, une fois la mémoire tampon (42) vide de données, définit la mémoire tampon (42) vide comme mémoire de destination des transferts, annule la suspension temporaire du transfert des données, et reprend le transfert des données vers la la mémoire tampon (42) vide.

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