Altera Quartus is a programmable logic device design software from Altera. Its features include:
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Quartus II is a software tool produced by Altera for analysis and synthesis of HDL designs, which enables the developer to compile their designs, perform timing analysis, examine RTL diagrams, simulate a design's reaction to different stimuli, and configure the target device with the programmer. The latest version (as of November 2011) is 11.1.
The Web Edition is a free version of Quartus II that can be downloaded or delivered by mail for free. This edition provided compilation and programming for a limited number of Altera devices.
The low-cost Cyclone family of FPGAs is fully supported by this edition, as well as the MAX family of CPLDs, meaning small developers and educational institutions have no overheads from the cost of development software.
License registration is required to use the Web Edition of Quartus II, which is free and can be renewed an unlimited number of times.
Quartus II Subscription Edition is also available for free download, but a license must be paid for to use the full functionality in the software. The free Web Edition license can be used on this software, restricting the devices that can be used.
The supported operating systems are: