I am used to Modelsim simulator (vlog followed by vsim).
In the same vein, how do ncverilog, ncsim, IUS5.7, LDV5.1 etc fit in?
Are they all executables to call the simulator (similar to vsim)?
What is ncelab/ncsim? How does it relate to IUS? Is IUS the compiler
and LDV the simulation executable?