Computer Logic Simulator

Computer Logic Simulator

The free Logic Simulator software simulates both combinational and sequential digital logic circuits.  Logic circuits can be very simple, such as and-or logic, or can consist of hundreds of parts.   Both basic parts, such as logic gates and flip-flops,  and MSI (Medium Scale Integration)  functions are supported.

The Computer Logic Simulator uses the same simulator as the Logic Design Draw & Logic Design Auto tools, and will support all digital logic types: Combinational - Sequential - Synchronous - Asynchronous

User Guide

See Logic Simulator Help for detailed documentation.

Input Window

The Input Window describes the circuit to be simulated and its input/output signals.  Data can be edited, cut and pasted, or loaded from a file.

Simulation features

Most input/output features of the Logic Simulator are identical to Logic Design Auto.  In addition to the logic gates and flip-flops available in Logic Design Auto, the Logic Simulator supports a number of 54/74LS series MSI functions.  Additional MSI parts can be user-defined using the LDD Macro Block mode.

For detailed part descriptions, refer to Logic Parts Data

Output Window Options

Input Signals - View input states/waveforms

Boolean Eqn - Boolean equation of the logic circuit

Netlist - Parts and Netlist of the logic circuit

Logic Circuit - Gate & flip-flop schematic drawing

Timing Format

01x        Logic 0, 1, x

_=x        underscore (Logic 0), equal (Logic 1), x (Logic x)

Graphic  Graphical plot of 0, 1, x states including glitches/spikes