Figures.. However they loose a full sector for every four which is pretty bad considering sync and other overhead that floppies incur. I'd used the 6850 in my first tape system back in '75-76 as it was available and worked well without baud rate clock scaling to do block replaceable FM format at around 30 kbaud. Problem was the tapes I used only got 60k of usable storage due to overhead. Going to a sync part upped that to 80k. Then I found a decent floppy that was affordable. Allison