Something I'm mildly curious about, all, knowing very little of the very-low level recording techniques used in single-density, RX02, and 'standard' double-density 8" floppies: The RX02 documentation indicates that the encoding scheme used in the double-density data portion of the sector is 'Modified Miller Code'. (Miller Code I get - it's either 0 or 1 flux reversals per bit time, which is half the maximum flux reversal rate used in the single-density FM encoding - but the Modified Miller is beyond me; it's not explained very clearly, and I don't see any value to forcing my aging neurons to work it out! :-) So, my question: is either of those (Miller and Modified Miller) the same recording scheme used in standard double-density, or do those use something else again? Noel