Does anyone have a working Altos 8000, the old kind with white face, single user that has the 8100 PCB and the 1791 DD dual drive system?

I'm restoring one and have am able to get a % prompt, and the drive seeks, but it doesn't appear to read any disk I create with my IMD system.

It would help to have access to a working machine, I could at least see if my disks are correct.