tldr: hardware interface samples FDD head at 25MHz, this allows for more relaxed timings and human assisted interpretation of MFM encoding on degraded media
ps: and if you still have trouble recovering with this hardware there is even more hardcore mod that adds Microstepping head motor controller, cant find the link at the moment :/
interface: http://www.kryoflux.com/
software: http://www.softpres.org/kryoflux:ui:stream-plot
tldr: hardware interface samples FDD head at 25MHz, this allows for more relaxed timings and human assisted interpretation of MFM encoding on degraded media
ps: and if you still have trouble recovering with this hardware there is even more hardcore mod that adds Microstepping head motor controller, cant find the link at the moment :/