There is two different types of DBV-200 heads, and each has two different types of memory, EPROM and Flash. Bally, WMS, Sigma use the type that has a small bill guide at the front and the electrical connector on the right side has different amount of pins compared to the IGT version. The IGT version is flush on the front. Bally and IGT DBV-200 heads are not interchangeable. ID044 is for Bally, WMS, and Sigma. The protocol is stored in the EPROM or if you have flash memory type, it has a surface mount chip, then the board/head would have to be reflashed by JCM programmer tool. I offer service to reflash DBV's.