Hi Dave I've not had the need for this so far but expect to sometime in the future. Most of the CP/M machines that I have either are common and have disk with them or are so uncommon that I've needed to hand build the disk from scratch. I have used the serial port to transfer information but once I have the basic core working, I just transfer files. If it is a binary file, I've used Intel Hex format and DDT to save to a binary. It would be interesting to compile a web page with all the different tricks used to handle the various image and file transfer problems of these older systems. Things like how to connect a 8 inch disk or a little source code that shows how to do console to disk transfers using the CP/M bios. One could include things like my H8/H89 image transfer program and my Olivetti M20 disk image building code. I have code from another fellow to move Polymorphic disk images from a Poly 881x to a PC with xmodem( windows supports ). There are so many ways to skin a cat. Each has a slightly different advantage under some conditions. Just a thought Dwight