JPS55135925A - Information transfer device - Google Patents

Abstract

PURPOSE: To make it possible to confirm that all the sending and receiving circuits have received information, by setting all the response circuits in order that the response signal lines can be a high level, in numbers of unspecified transmission object information processing devices.

CONSTITUTION: When a status signal line 105 has become a low level, a comparator 11 of the receiving part 10B energizes a selective signal line 111 and opens a receiving data gate 14 to the internal data bus, in case the contents of the status bus 102 and those of the status register 24 have been matched. And in case a sending signal line 103 has become a low level, so far as contents of the register 24 are not conforming, a non-selective response control line 112 is energized and the response circuit 13 is set. In case contents of the register 24 are matched, a confirmation response circuit 15 energizes a write-in line 204, is made to write in contents of the bus 201, and simultaneously sets a circuit 13, only when both the signal line 111 and the ready line 203 have been energized. When all the circuits 13 have been set in such a way as mentioned hereinabove, the response signal line 104 becomes a high level finally, and the sending part is informed that all the sending and receiving circuits have completed receiving a signal.

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