Thanks for the info on formatting an RK05 disk. I guess I did not know this was possible. Does anyone happen to have the program to do the actual format? I use Dave Gesswein's dumprest to load code from a PC to my 8f. That program is not part of the package. I don't think I have ever seen it, but may have overlooked it while browsing the main pdp-8 sites. Thanks. It would be great if that's all I had to do to make the disks useful again. Tim R. _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!