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Altera_Forum's avatar
Altera_Forum
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10 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
Icon for Honored Contributor rankHonored Contributor
10 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).