This paper summarises the approach taken to develop an open architecture full tokamak discharge simulator - DINA-CH based on the DINA code and implemented under graphical programming control using Matlab-SIMULINK. The evolution path and present status are presented, with applications to ITER and TCV. The future evolution combining DINA-CH with Cronos, is discussed. (c) 2005 Elsevier B.V. All rights reserved.