The O1 used either Siemens or MPI drives (according to my O1 Technical Manual). The electronics board was, however, replaced with an Osborne-designed board. The Tech Manual has a layout diagram and a schematic for this board. -----Original Message----- From: Eric Chomko [mailto:vze2wsvr@verizon.net] Sent: Thursday, November 08, 2001 9:46 PM To: classiccmp(a)classiccmp.org Subject: Re: head-positioners - (was Apple Floppy Drives (was: More Apple Pimpers)) <snip> Wasn't the Osborne I floppies Siemens? Eric <snip>