Eprom retro-fitted so this FDC works with the Tano Dragon 32 or 64. Also works on the Tandy TRS-80 Color Computer 1 2 or 3 with the flick of a switch. I take a Radio Shack Disk Controller cartridge, test it in a Coco system. The I remove the Coco DOS 1.1 Prom and install a special DragonDOS 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 and Coco 1 2 3" is in sale since Tuesday, October 6, 2020. 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.