Hi Darrel, i certainly agree with your idea of using interrupts priority, but for the moment i would really find useful this system in 18F devices as i need for example more code (32K) or even the USB port.

My 16f877 is full even with the method of storing strings in the code space.

By the way, i am also looking to make my project to PRINT in a standard ASCII characters printer, can you give me any advice?, an easy link?. Thanks!!.