The floppy set for the LB15 requires not only the floppy drive, but also has a interface board that has to slide in to the OSP rack. It's not just parameters, once the bubble goes, you have to reload system files, so no you can't load those through RS232. If you have a bubble error, 95% chance you will need to purchase the replacement SRAM board to replace the bubble card, along with the battery that will now be required for the SRAM. Bubble has not been produced for many years now..