thanks bogdan, i did not know about that but now i see the section over there, do you use it ?
there seems to be a range of Proteus products, which one do i need to purchase ?
the sch side simulation is interesting but i already have the real schematic tools covered (in Altium) i am more interesting in running a simulation on the source code and breaking / stopping at various points to examine the values of variables, will it do that ?