[Coco] Disk interface?

[Torsten Dittel]

> The controller appears to be a CoCo FD-500 (long case with a WD1773). In the
> picture showing the back of the box, it looks like the cable enters directly
> through the bottom (no connector).  I would guess that someone has modified
> the box so that the drives could be connected directlly to the CoCo
> controller.

ACK. I just had a look here:
http://vt100.net/mirror/harte/Radio%20Shack/TRS-80%20Model%20100%20Disk_Video%20Service%20Manual.pdf
That beast has the controller (WD1791 type) inside (connected to a Z-80A
type CPU).