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Altera_Forum
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17 years ago

ModelSim MegaFunction ROM Simulation Problem

I have a design that I use Megafunction generated ROM. I am able to simulate the design in ModelSim until I add the Megafunction generated ROM .vhdl file into the project. At that point, when I start...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

ModelSim hanging in an endless loop should be regarded as a bug, but happens sometimes, also to my experience. The point with ROM Megafunctions is, that ModelSim doesn't understand *.mif files for ROM initialisation (as far as I know) but needs *.hex files in ModelSim project base directory. A probably more simple way is to infer the ROM from HDL code (in VHDL, you can generate e. g. sine look-up tables from a few lines of code). This initialisation is understood by Quartus and ModelSim as well.