  We present our end-to-end capability for computing the convective phase
through the explosion phase of Type Ia supernovae. We compute the convective
phase up to the time of ignition using our low Mach number code, MAESTRO, and
the subsequent explosion phase using our compressible code, CASTRO. Both codes
share the same BoxLib software framework and use finite-volume,
block-structured adaptive mesh refinement (AMR) to enable high-resolution,
three-dimensional full-star simulations that scale to 100,000+ cores. We
present preliminary results from the first-ever simulations of convection
preceding ignition using MAESTRO with AMR. We also demonstrate our ability to
initialize a compressible simulation of the explosion phase in CASTRO using
data obtained directly from MAESTRO just before ignition. Some care must be
taken during this initialization procedure when interpreting the size and
distribution of hot spots.
