Minimal rings related to generalized quaternion rings

The family of rings the form
 \frac{\mathbb{Z}_{4}\left \langle x,y \right \rangle}{\left x^2-a,y^2-b,yx-xy-2(c+dx+ey+fxy) \rangle}
 is investigated which contains generalized Hamilton quaternions over $\Z_4$. These are local order 256. This has 256 contained in 88 distinct isomorphism classes. Of non-isomorphic rings, 10 minimal reversible nonsymmetric and 21 abelian reflexive nonsemicommutative rings. Few such examples have been identified literature thus far. computational methods used to identify classes also highlighted. Finally, some quaternion $\Z_{p^s}$ characterized.