  A cosmological hydrodynamic code is described, which includes a routine to
compute cosmic ray acceleration and transport in a simplified way. The routine
was designed to follow explicitly diffusive acceleration at shocks, and
second-order Fermi acceleration and adiabatic loss in smooth flows. Synchrotron
cooling of the electron population can also be followed. The updated code is
intended to be used to study the properties of nonthermal synchrotron emission
and inverse Compton scattering from electron cosmic rays in clusters of
galaxies, in addition to the properties of thermal bremsstrahlung emission from
hot gas. The results of a test simulation using a grid of $128^3$ cells are
presented, where cosmic rays and magnetic field have been treated passively and
synchrotron cooling of cosmic ray electrons has not been included.
