TkGate 1.8

by Jeffery P. Hansen (mail)

TkGate is a event driven digital circuit simulator with a tcl/tk-based graphical editor. TkGate supports a wide range of primitive circuit elements as well as user-defined modules for hierarchical design. The distribution comes with a number of tutorial and example circuits which can be loaded through the "Help" menu. The example circuits include a simple CPU, programmed to run the Animals game. For more information, check out the documentation. TkGate is free software provided with source code under the Gnu Public License.

Key Features:

• Graphical circuit design
  • Hierarchical design through user defined modules.
  • Easy to use point-and-click user interface.
  • Create hyperlinks to move about in circuit or load other files.
  • Multi-lingual interface (Catalan, English, French, German, Japanese, Spanish, Welsh)
  • Verilog-like save file format.
• Logic simulation
  • Control through the GUI or through script files.
  • Suitable for simulation at transistor, gate or register transfer level.
  • Six valued logic model including 0, 1, floating, unknown, "low" and "high".
  • Support for custom delay models.
  • Graphical display of simulation results.
  • Breakpoints, single-step and clock-step simulator control.
  • Static critical path analysis.
• Primitive circuit elements include:
  • Basic gates (AND, OR, etc.)
  • Switch-level NMOS and PMOS transistors
  • Tristate buffers
  • Alu components (Adders, shifters, multipliers)
  • Memory elements (Registers, RAMs, ROMs)
  • An interactive "tty" element allows design of circuits that can interact with the user.
• Support tools include a microcode/macrocode compiler to assist in creating large projects such as microprocessor designs.