The I remove the Coco DOS 1.0 Prom and install a special SuperDOS E7T Eprom, test it on my Tano Dragon 64 test system. After confirming it works well I list it here.Works well, see youtube video of one running by looking up RE1974. Yes I know this video is from a different, previous, one of these but the principal and result is the same. The item "TRS-80 Coco Disk Controller FDC modified for Tano Dragon 32 64" is in sale since Wednesday, March 17, 2021. This item is in the category "Computers/Tablets & Networking\Vintage Computing\Vintage Parts & Accessories".ians_junque" and is located in Deer Park, VIC. This item can be shipped worldwide.