HP28S manuals

Hi,

In a recent move, I lost the documentation to my HP28S calculator. Is there a good website for programming the HP28S. I've been looking for two days now and have found nothing.

Also, doesn't HP support existing owners with PDF files for their calculators, even if they are somewhat dated? I spend over $300 for this calculator and now can't even use most of it's functions without documentation.

Chris