Norm,
  Sorry for not responding sooner; I was hoping to have something
of more substance to report.  I've been looking at the parity error
problem--it appears to be a problem related to bus holdups when
changing from read to write, which was masked by holdups the
cam chip used to generate.  I attempted to fix the problem but
there is still a problem with which I would like to have Tom's help.
  I wish the new were better; see you tomorrow.

                        Doug