| 摘要 |
PURPOSE:To emphatically display a bus line, and to support a confirming work of logic by deciding whether each signal on a logic circuit diagram is a bus line or not, respectively, and varying its displaying method, as for the signal line which is decided to be the bus line. CONSTITUTION:When a start command is inputted, a bus line detecting part 1 checks in order from a signal line table N1, and if plural pieces of input sources of a signal line exist, and also, a type of its input sources is all a tri- state gate, its signal line is decided to be a bus line and rewrites a display attribute to red, and in other case, it is decided not to be a bus line and the display attribute remains unchanged. In case of a signal line table, signal lines N1-N5 have one piece of input source, respectively, therefore, the display attribute remains white, and a signal line N6 has plural pieces (two pieces) of input sources, and also, a type of the input sources is all a tri-state gate, therefore, it is decided to be a bus line and the display attribute is rewritten to red. Also, an for a signal line N7, its input source is one piece, therefore, the display attribute remains white.
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