| 摘要 |
PURPOSE:To reduce the collating processing time, by providing a collating circuit for performing a plurality of data collations at the same time to a computer system. CONSTITUTION:In an international telephone exchanger of accumulating program system, a CPU1 sets a telephone number of a subscriber required for the collation of number with a black list to registers R0-R7 synchronously, collating data is read out by one word from the black list in a storage device 2 and it is set in a register R8. The collation between the data of the R8 and the R0-R7 is made at a respective collation circuits 6 at the same time and when the collation data and collated data are coincident with each other, 1 is set to the corresponding bit of a register R9 and this is repeated until the data of the black list becomes absent. When the collation is finished, the content of the register R9 storing the result of collation is read to discriminate whether there is any coincidence between the collated data and the data in the black list. |
