"What Kripke is ABOUT, of course, is the Thistlewaite-McRobbie IMPLEMENTATION of my EXTENSION of Kripke's decidable Gentzen-style consecution calculus for R-> to what I called R-Dist (and which more recently has gone by the name of LR, for Lattice R). LR is just the Anderson-Belnap system R of relevant implication, MINUS the proof-theoretically challenging (and Urquhart undecidability-inducing) postulate that extensional & distributes over extensional v."  Bob Meyer
 

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There are two pascal source files available.  The original is the implementation for LR with additional comments by Gustav Meglicki, available as kripke.p.  The second is a modification by Bob Meyer of the first file implementing linear logic, available as linear.p.