As far as I know there is only one computer on the planet which generates 'true' random numbers. It's called E.R.N.I.E. and it's used for the permium bonds here in the UK.

a pseudo random number generator would probably be more up your street.

try here :-

http://www.pjrc.com/tech/8051/rand.html

or look in the user pages section.

Chris.