Does anyone happen to have the IBM Diskette OEM Information manuals: GA21-9190 one-sided GA21-9257 two-sided I'm specifically NOT looking for the Diskette General Information Manual, GA21-9182, unless someone has an edition earlier than Fourth or later than Sixth. The OEM Information manuals were the definitive reference for the track formats for eight-inch diskettes. Generally equivalent information is available from a lot of later sources, including ECMA, ISO, and ANSI standards, and from vendor datasheets and application notes for floppy drives and floppy disk controller chips, though I've encountered a number of inaccuracies in vendor documentation. The ECMA standards are available online. I'm interested in the IBM OEM information manuals primarily for historical reasons, not because I'm missing any particular technical information. Thanks! Eric