Which PC floppy controllers and drives can handle single density (FM)?
Some folks will tell you that you need an older PC to get single density (FM) support. This is wrong. The floppy disk controllers in many PCs being produced today support FM, and many older ones do not. Some controllers will support FM on all floppy drives, while other controllers have problems with 5.25-inch 1.2MB HD drives and may require you to change a jumper in the drive or (more likely) use a 5.25-inch 360K DD drive instead. If you need to read and write single density disks, the best thing to do is to try it on the PCs that you have available and see if you can find one where it works. This is more accurate and usually easier method than opening up the box and peering at the part number on the FDC or SuperIO chip (which might not give you a definite answer anyway). If you can’t find one that works, the information below and in topic [16] may be of some help. The detailed information below was gleaned from newsgroup and Classic Computer mailing list postings by Amardeep S. Chana,
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