i have 1994 mitsubishi diamante, how do i input the code for he radio after disconnecting the battery

Hey i had the same problem with my radio and i went to a near by diamante dealer ship, and they told me to do this

Turn on the car to "ACC" and leave it on there for 1 full hour, and then u will see cODE written on the cd player thing...then put in the security code u were given, if u don't know it call a dealership and try to find out, then put in the code and it should work fine man, good luck