how to write test bench to see internal signals in ModelSIM-Altera

i don't know about adding them in HDL without porting everything to the top

what i usually do is use NativeLink to generate the simulation script once, then i add some internal signals i want to observe right into the Quartus generated .do file. when you add signals to the wave using ModelSim GUI, it will show the command it used in the console window. you can copy and paste that into the .do file. you can also adjust the signal radix and display format in the .do file

after you get a working .do file, you can go to NativeLink setup and tell Quartus to use the simulation script that you edited. as long as you don't add or remove any HDL files in the project, this simulation script should good to use