  We utilize a novel method to study the thermodynamics of two dimensional type
0A black holes with constant RR flux. Our approach is based on the
Hamilton-Jacobi method of deriving boundary counterterms. We demonstrate this
approach by recovering the standard results for a well understood example,
Witten's black hole. Between this example and the 0A black hole we find
universal expressions for the entropy and black hole mass, as well as the
infra-red divergence of the partition function. As a non-trivial check of our
results we verify the first law of thermodynamics for these systems. Our
results for the mass disagree with the predictions of a proposed matrix model
dual of the 0A black hole.
