Can i Hook a Pocket Pc up to my engine?

Hello i have a 89 civic HB with a b16a engine in it, i was wondering if there is any way i could hook up my dell axim pocket pc up to it? the only reason i am asking is cuz one of my friends have a 91 laser turbo and he hooked a pda up to his car and can see his rpms.. and my car has no rpm gauge.
Thanks for all the help and info.

You could just get an aftermarket tach and save yourself some cash. Or you can try finding instructions on socketing the board, and then running some kind of program for you PDA.