  Living substrates are capable for nontrivial mappings of electrical signals
due to the substrate nonlinear electrical characteristics. This property can be
used to realise Boolean functions. Input logical values are represented by
amplitude or frequency of electrical stimuli. Output logical values are decoded
from electrical responses of living substrates. We demonstrate how logical
circuits can be implemented in mycelium bound composites. The mycelium bound
composites (fungal materials) are getting growing recognition as building,
packaging, decoration and clothing materials. Presently the fungal materials
are passive. To make the fungal materials adaptive, i.e. sensing and computing,
we should embed logical circuits into them. We demonstrate experimental
laboratory prototypes of many-input Boolean functions implemented in fungal
materials from oyster fungi \emph{P. ostreatus}. We characterise complexity of
the functions discovered via complexity of the space-time configurations of
one-dimensional cellular automata governed by the functions. We show that the
mycelium bound composites can implement representative functions from all
classes of cellular automata complexity including the computationally
universal. The results presented will make an impact in the field of
unconventional computing, experimental demonstration of purposeful computing
with fungi, and in the field of intelligent materials, as the prototypes of
computing mycelium bound composites.
