How to switch simulation mode? - How to switch simulation mode? Description Change directory to ..tesetbench/<variant>_tb/simulation, and open <variant>_tb.v file. Search string "serial_sim_hwtcl", you can switch the mode by modifying this value. 1 presents serial mode and 0 presents PIPE mode. Resolution Custom Fields values: ['novalue'] Troubleshooting novalue False ['Simulation'] ['FPGA Dev Tools Quartus II Software'] novalue 12.0 ['Arria® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']