sweesw said:The major difference between VCS and the other 2(NC and Modelsim) lies in the fact that the simv executable is generated instead of a top level "snapshot" or cell.
you just need to run simv as a command which is, IMHO, much more straightforward than the other 2, which need "vsim top" or "ncsim top" .
Actually the beauty of VCS is not only speed, but also the fact that you can clearly see it calls for GNU Gcc compiler to get simv, which makes this tool a long life product for sure!!!
In terms of GUI debugging, none can compeate with Debussy.
NC trys to integrate signalscan(after acquire Designacc) into its Simvision environment, which looks ugly to me, although I used to play with signalscan before i found debussy.
VCS/Scirocco has no choice but Virsim as its GUI for historical reason, which still does not support schematic viewer for VHDL design. It looks ugly to me too. But one thing that is worth mentioning is that Synopsys has taken an initiative to line up all the GUIs for its future tools to use Qt, which is the basis for KDE , which is the most beautiful Desktop Environment for Linux!
Modelsim seems to be the cram of crop as to user frendly GUI Design, but still a bit far from Debussy. Modelsim 5.8 have added more features(Coverage, Language, etc).
I think most of the posters choose NC because they all use Windoze platform and Synopsys has stopped supporting VCS since 6.0 release on Winnt.
I will bet on VCS on Linux as the Future, although I own all the 3 simuators on all the platforms.
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