  We present new grids of pre-main sequence (PMS) tracks for stars in the mass
range 0.1 to 7.0 Msun. The computations were performed for four different
metallicities (Z=0.01, 0.02, 0.03 and 0.04). A fifth table has been computed
for the solar composition (Z=0.02), including a moderate overshooting. We
describe the update in the physics of the Grenoble stellar evolution code which
concerns mostly changes in the equation of state (EOS) adopting the formalism
proposed by Pols et al. (1995) and in the treatment of the boundary condition.
Comparisons of our models with other grids demonstrate the validity of this EOS
in the domain of very low-mass stars. Finally, we present a new server
dedicated to PMS stellar evolution which allows the determination of stellar
parameters from observational data, the calculation of isochrones, the
retrieval of evolutionary files and the possibility to generate graphic
outputs.
  WWW site : http://www-laog.obs.ujf-grenoble.fr/activites/starevol/evol.html
