I've found someone who has the entire collection of disks from USUS, the UCSD Pascal User Group, and he's cheerfully coaxed his Linux box's disk parameters into reading the 800K 5 1/4 Pinnacle Systems disks he had. I hope to decipher the .SVOL "disk volume in a file" method they were stored in, and post them to my web page soon. He also mentioned he has source code on 8 inch disks from an Ohio Scientific, Inc. machine. He thought hed have more trouble finding a way to read those because of its scheme of using an 6820 parallel port controller and a 6850 serial port controller to access floppies. Is that true? Should the normal scheme for connecting a Shugart-y drive to an old AT-era WD controller work to read these old disks? - John