Register Description help wanted

[Dave Hempstead]

Hi,
   As I dive into reverse engineering my PCM, I am finding
a number of rom constants being loaded into the Timer I/O chip.
 I can't find any detailed register descriptions (or chip
description, for that matter)for this chip.  I've been to
the Delphi automotive web site, and have read their 2 page
blurb on the chip, but it contains very little in the
way of useful information.

   Does anyone have this info??

  What about the I/O with Ram chip???


Any help will be greatly appreciated,
Dave Hempstead
16188051 PCM
'96 Impala SS engine
dave_hempstead at hp.com