Simple question about memory addresses
 

How do I find the data for a memory address?

Whenever I try to run Jazz Jackrabbit through XP's command prompt It keeps coming up "runtime error 200 at 0009:3A2A" without even trying to start the game.

I want to know how I can fix whatever thorn is there so I can play my game!

There is more chance of something beeing wrong with the game than there is something that you can fix in hardware.
My guess is that the game is attempting to use some driver or software in a way that XP doesn't allow (ie. direct memory access).
You could try to play with the settings on the compatability tab for that exe file.

Best of luck.
ZB

Usually, it's best to search for the game with the error. People usually have the same errors.

Runtime Error 200 - 'Divide by 0'

compatibility mode might work, but running Dosbox or similar might resolve issues with very old games.