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Altera_Forum
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11 years ago

Quartus does not support unresolved numbers from numeric_std!!!

I have just found that code using unresolved_unsigned is rejected by Quartus II (it is accepted by Modelsim). I tried including numeric_std_vhdl2008.vhd in my project, which resulted in syntax ...
Altera_Forum's avatar
Altera_Forum
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11 years ago

The problem is Quartus does not have proper VHDL 2008 support. It only supports specific features of the language, as specified here: http://quartushelp.altera.com/14.1/mergedprojects/hdl/vhdl/vhdl_list_2008_vhdl_support.htm

This does not include any of the updated versions of the ieee libraries.

So you will have to stick to the '93 versions (and use a simulator to check for 'X' propogation to find multiple drivers - the synth tool will tell you this too).