Removing glued hardwood floor

I need to remove a hardwood floor that's glued to a slab. I'm having a hard time finding a method that won't take me days and days to finish. The total area is about 500 square feet.

I've tried a hand scraper, but when I do eventually get the blade somewhat under the wood, it just splinters. I know I'm a novice at this, but the 45 minutes it took me to remove a 6"x6" section can't possibly be the best way to go.

I picked up a 1" hammer drill with a 3" chisel today but I haven't opened it yet-I'm thinking that may not be the tool for the job.

Thanks in advance.