We describe aspects of the Chroma software system for lattice QCD
calculations. Chroma is an open source C++ based software system developed
using the software infrastructure of the US SciDAC initiative. Chroma
interfaces with output from the BAGEL assembly generator for optimised lattice
fermion kernels on some architectures. It can be run on workstations, clusters
and the QCDOC supercomputer.Comment: poster presented at Lattice2004(machines