All: I?m troubleshooting my IMSAI that has YE-380 high-density 5.25? floppy drives replacing 8? drives, and I?m looking for schematics of the drive. The YE-380 drives were originally used in the IBM PC/AT, but I?m sure other machines used them too. I did some googling earlier and didn?t come up with anything useful. Does anyone have a pointer to the schematics or a pdf/jpg you could send me? Thanks! Rich -- Rich Cini Collector of Classic Computers Build Master and lead engineer, Altair32 Emulator http://www.altair32.com http://www.classiccmp.org/cini