NewBear 77-68 Floppy Disk Controller (opens in new tab)

The NewBear 77-68 is approaching its 50th anniversary. As an original owner of one of these systems, I recently recreated a replica of the machine I owned back in the day. However, the Floppy Disk Controller was the one card I never built. While the Carter Brothers have kindly published the hardware plans online, I have been unable to find any information about the BearDOS operating system that was written for it. I would love to complete the Floppy Disk Controller build as part of the 50th a...