| 摘要 |
PROBLEM TO BE SOLVED: To realize high quality service for multimedia information requiring real time performance without being restricted by a capability of a CPU and a memory size or the like. SOLUTION: A CPU 11, a main memory 12, a voice output interface 54, a display interface 56, a voice input interface 58, a video input interface 60, and an asynchronous transfer mode(ATM) communication adaptor 61 provided with a bus controller 62 and with a management table 64 storing in cross reference a virtual path(VP), a virtual channel(VC) and a direct memory access(DMA) transfer address for each interface (data with different attribute) are connected to a system bus 13. Each interface is provided with a memory (54d-60d) possible for DMA transfer from the bus controller 62 and a header delete/addition circuit (54c-60c) for a transfer control protocol and data are transferred directly not via the CPU 11 and the main memory 12 between the ATM communication adaptor 61 and each interface. |
