Hi Everybody, (Hi doctor Nick) I discovered that I had a couple of power supplies all along. I remembered this afternoon that I have a couple of Atari 1010 Cassette drives tucked away, so I dug em out and sure enough: Atari 9v 31va supply - just what the doctor ordered. I also found a program called WRITEATA which tries to write Atari format disks on a standard PC drive. It has trouble due to differences in drive speed and the fact that it can't do 128 byte sectors, however I was able to get it to write 130k "enhanced format" 1050 disks. Most Atari DOS images I've found are 90k which it can't do, however I found one called "TurboDos" in a 130k image, and was able to write it and it booted! It booted and then crashed on the 600XL I was originally testing with, however I noticed a message indicating "XE RAMDISK LOADED" ... so I tried a 130XE and everything worked - it comes up in some sort of menu program written in basic, which I could exit (to BASIC), then use "DOS" to get to DOS - so my drive does work! I also found a 130k disk copying disk that works, it appears to have a German version of Atari DOS 2.5 underneath it. Thanks to everyone who helped me figure this out. Regards, -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector.