Well, I'm at the point of putting design to keyboard and writing code. I'm going nice and slow to check things out in stages. I'm putting 'testing stubs' in the code so as not to screw things up too much. Format the RAMdisk (MDFRMT), put in the dummy directory entries, make sure they are there (MDDIR), upload the latest MDERA code, run the test, find the errors, figure out what I did wrong and fix it, rinse, repeat. I'm probably on the sixth design I've had just trying to figure out how I want the program to flow, even before starting to write the code. All part of the hobby.