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ModelSim is a program recommended for simulating all FPGA designs (Cyclone®, Arria®, and Stratix® series FPGA designs). ModelSim has a 33 percent faster simulation performance than ModelSim®-Altera® Starter Edition. ModelSim apears in two editions Altera Edition and Altera Starter Edition.
ModelSim-Altera Edition software is licensed to support designs written in 100 percent VHDL and 100 percent Verilog language and does not support designs that are written in a combination of VHDL and Verilog language, also known as mixed HDL. It supports designs of up to 3,000 instances.
ModelSim-Altera Starter Edition is a free program that offers you support for simulating small FPGA designs. The starter edition has a limitation set at 10000 executable lines. The program allows you to create your own designs or choose from a vast library of simulators that you can test for various purposes.
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