Disk section of new proto board checks out – I’m able to read/write/format disks with same functionality as the first proto board. Inner tracks don’t seem to read quite as reliably as before, but I’ll look at this later on. Using a crystal for clock seems to be a good thing, because the format function seems to fit a track a little better on to a disk. I couldn’t tune that RC oscillator well enough to suite my liking.

Next step is the USB interface.

Regards,
Mike Willegal