Entering a truth table

Entering a truth table

To enter a function by truth table:

1. Select File | New | Truth Table.
2. In the dialog that appears, select the number of inputs and the number of outputs.
3. To edit a variable name, click on the name and type.
4. Click OK and the truth table will appear.
5. To change the value of one output for one term, double-click the output cell. The output value rotates through 0, 1, and X ("don't care").
6. To change a number of outputs simultaneously, first select the rows using standard selection tools (click, shift-click, ctrl-click). You can also drag the cursor to select a block of rows. After the selection is made, choose True, False, Don't Care, or Invert from the Truthtable menu or the context menu. Note: If the problem has multiple outputs, you can mask any output to protect it from changes by clicking the output column header. When masked, the output values are displayed in light gray. Click the column header again to enable changes.
7. When you are finished editing the outputs, select Truthtable | Submit, or just press ENTER. To cancel truth table entry select Truthtable | Cancel or press ESC.

Notes:

• Variable names are limited to 8 characters. For complete rules, see Equation Syntax.
• The Truthtable menu contains commands to make global changes to the the output values.