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Altera_Forum
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16 years ago

Quartus II 9.1 changes inference rules for altsyncram

Hi folks, I may have found an interesting "feature" that appeared in Quartus II 9.1: a VHDL constant ROM is not inferred as an altasyncram if its size is not a power of 2. This is not the ...
Altera_Forum's avatar
Altera_Forum
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16 years ago

I didn't try QII 9.1 yet, but I noted in the docs that 9.1 introduces smart resource aware RAM/ROM inference. I would suspect that bug or not, your issue might be possibly related to this. I might be a good idea to try disabling this new feature and and see if it makes any difference.