| 摘要 |
PURPOSE:To realize application to any kind of facilities and to improve flexibility by discriminating whether an input-output address is an address for operation number display or not, and latching the address and displaying it in numbers. CONSTITUTION:Address data specifying equipment is outputted to an address line 16a to select the specified equipment by input and output selecting circuits 14 and 15, and arithmetic is performed by a logical operating circuit 13. To the input-output bus line 16, an operation number display device 17 is connected, and the address data from the line 16a is discriminated; only when a signal SETON is outputted, an sddress to be displayed is latched by a latch circuit 21. Then, the latched numeral is displayed on a numeric display device 23 as an operation number. An address converting circuit 25 composed of a programmable ROM for multibit words enables an optical address to be used without being limited by the specific address area of all input and output addresses. |
