Testing on vlogpp showed some errors related to memoization.  While memoization is a bit superfluous for a preprocessor, still good to fix bugs.  I added a raise-the-bar technique to essentially timestamp when an Acceptor is in process and a later one modifies the char buffer.  Seems to work as planned.
Also started testing on an open-source Sparc processor verilog design. I will put a link/ref to download; or perhaps just upload here.