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what do you think on using address_save? Is is a good way to stabilize the address signal?
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I don't have an opinion on the coding style. If it was recommended for Mentor Precision, then it should be fine for that tool and likely is fine for Quartus integrated synthesis too.
I don't know what you mean by "stabilize the address signal". In all recent Altera device families, the RAM blocks require the address to be registered inside the RAM block at the input. Static timing analysis with proper user constraints tells you whether the address is stable at the correct time with respect to the clock.
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