I have two of them and they are both upgraded to Amax-IV from Amax-II+. I am almost positive that Rev g of IC5 is the II+ and Rev h is Amax-IV, so it looks like you have the latest version.
Here is the A-Max Homepage. I can't believe it is still up after all of these years. You had probably grab anything you want to download quickly:-D I backed up the site years ago just in case.
-Jeff
The Official A-Max Home Page
