Users are able to develop their own interface routines, and substitute new vectors for the original vectors in the startup UV-EPROM. This  seamlessly maintains the normal operation of the board's monitor and languages such as Synertek Systems BASIC.
In this context, users have the flexibility to create their own user interfaces, and update the initial vectors in the UV-EPROM with new values. This allows the board's monitor and programming languages such as Synertek Systems BASIC to continue functioning properly.