Adds a new circuit into the current project. Logisim will insist that you name the new circuit. The name must not match any existing circuits in the project.
Loads a library into the project. You can load three types of libraries, as explained elsewhere in the User's Guide.
Unloads current libraries from the project. Logisim will not permit you to unload any libraries currently being used, including libraries containing components appearing in any project circuits, as well as those with tools that appear in the toolbar or that are mapped to the mouse.
Moves the currently displayed circuit one step up the list of circuits within the project, as displayed in the explorer pane.
Moves the currently displayed circuit one step down the list of circuits within the project, as displayed in the explorer pane.
Sets the currently displayed circuit to be the project's
main circuit.
(This menu item will be grayed out if the
current circuit is already the project's main circuit.)
The only significance of the main circuit is that it is the
circuit that first appears when a project file is opened.
If you've edited the circuit's appearance, this menu item reverts the appearance back to the default rectangle-with-notch appearance. The menu item is enabled only when editing the circuit's appearance.
Changes the explorer pane to displaying a list of the project's circuits and the libraries that have been loaded.
Changes the explorer pane to displaying the hierarchy of subcircuits in the current simulation.
Switches to allow you to edit the layout of components, which determines how the circuit works. This menu item is usually disabled since you will usually be editing the layout anyway.
Switches to allow you to edit how the circuit will be represented
when it is used as a subcircuit within another circuit. By default, the circuit
is represented as a rectangle with a gray notch
on its north end, but
this menu option allows you to draw a different appearance for the
subcircuit.
Removes the currently displayed circuit from the project. Logisim will prevent you from removing circuits that are used as subcircuits, and it will prevent you from removing the final circuit in a project.
Computes a truth table and Boolean expressions corresponding to the current circuit, displaying them in the Combinational Analysis window. The analysis process will only be valid for combinational circuits. A full description of the analysis process is described in the Combinational Analysis section.
Shows a dialog containing statistics about components used by the currently viewed circuit. The dialog includes a table with five columns:
The distinction between Unique
and Recursive
is easiest to
explain by considering the 4:1 multiplexer built using three 2:1 multiplexers
as in the Using subcircuits
section.
The 2:1 multiplexer contains two AND gates (and the 4:1 circuit includes none),
so the Unique
count
of AND gates would be 2; but if you were to build the 4:1 multiplexer using this
diagram, you would actually need 2 AND gates for each of the three 2:1 multiplexers,
so the Recursive
count is 6.
If you are using circuits from a loaded Logisim library, those components are
considered to be black boxes
: The contents of the library's circuits are
not included in the unique and recursive counts.
Opens the Project Options window.
Next: The Simulate menu.