"I'm sure you don't understand me."

Maybe you should see your therapist, then? ;-)

Seriously, if you can't explain what you're trying to do, how about telling us why you feel the need to do it?

My guess is that you're trying to convert to BCD (Binary-Coded Decimal) - where each nibble represents one decimal digit?

If so, this has been covered here ad nauseam and a quick 'Search' should find it!