The simulation CPG_Rev, contributed by Joseph Aulenbrock, is a modification of the CPG tutorial, intended to extend its use to the study of simple idealized Hebbian reverberations. The documentation, in reverb.txt explores the behavior of some examples. reverb.ps was generated with mpage, and is the same as reverb.txt except for the addition of a left margin (and incidentally left and top box lines). The documentation is informal and unfinished, and is being submitted now for comments, and to make it available to anyone who might find use for it in their work. Joseph Aulenbrock j_aulenbrock@compuserve.com This is an improved version of the files in "revpac". The postprocessing has been simplified, and references have been added in the documentation.