How to modify the IBIS model under quartus for board signal simulation. I am using cyclone IV (EPCE55).
If you have started your FPGA design and have created custom I/O assignments, you can use the Intel Quartus Prime IBIS Writer to create custom IBIS models to accurately reflect your assignments.
Reference: Generate Custom IBIS Models with the IBIS Writer
You can Setting Up the Package RLC Values in IBIS in the link below: