| 摘要 |
PURPOSE:To omit production of an on-line program by using four flags and an exchange program set in a processor to a perform the automatic exchange of data to the data of different types. CONSTITUTION:An input open flag 32 which is set in response to an input open request of a computer set at the input side is provided together with an output open flag 31 which is set in response to an output open request of a computer set at the output side, a write request flag 33 which is set when data are received after a write request given from the output side is allowed, and a read request flag 34 which is set in response to a read request given from the input side. Both write and read requests are allowed when both flags 32 and 31 are set. Otherwise these flags 31 and 32 are reset. While data are transferred to the computer of the input side when both flags 33 and 34 are set and these flags are set at a time. Otherwise the flags 33 and 34 are reset. |
