how to simulate custom instructions

[Altera_Forum]

My multi-cycle custom instruction is not behaving as expected, 

the problem is also, that the exact timing of the interface signals from nios-2 is not specified in the Altera documents, is there a way to simulate custom instructions ?  Thx, Adriano

[Altera_Forum]

Signaltap might be informative...

[Altera_Forum]

Follow the same steps as you would simulate a Nios II design and you should have visibility into the customer instruction and it's interfaces.