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    • 9. 发明专利
    • DATA TRANSFER SYSTEM BETWEEN BLOCKS
    • JPS6021656A
    • 1985-02-04
    • JP13060683
    • 1983-07-18
    • FUJITSU LTDNIPPON TELEGRAPH & TELEPHONE
    • ARIMA SHIYUUHEIYASHIRO ZENICHINANBA MASAKI
    • H04L29/02G06F13/364G06F13/42
    • PURPOSE:To attain effective data transmission in the unit of plural bytes by allowing a transmission side to transmit the information of the number of effective bytes respectively in the 1st transmission data and the last transmission data to a reception side just before the start of data transfer. CONSTITUTION:In transmitting a data from, e.g., a processor 2-1 to a processor 2-m among plural information processors 2-1-2-n connected to a common bus 3, the processor 2-1 transmits a bus usage request signal to a common bus control section 1. When a bus use enable signal is returned from the control section 1, the processor 2-1 transmits an opposite device number from a common bus driver 21. The processor 2-m returns a ready signal when the 2-m receives the device number. The processor 2-1 transmits memory control information, the data and a data end signal. The information of the number of effective bytes of the 1st transmission data and of an effective byte number of the last transmission data is included in the memory control information, and a control section 22 of the processor 2-m extracts only the effective data based on the received information of the number of effective bytes the processor 2-m stores it in a memory 23 and returns a data reception OK signal.