On Sunday 23 October 2011, you wrote: > Hi Groepaz, > > On 2011-10-23 15:18, Groepaz wrote: > > On Sunday 23 October 2011, you wrote: > >> Given the fact that I've already tried dumping the disks with an 80 > >> track drive (HD) - I'm leaning more to my own conclusion which is: > >> > >> I need to get hold of a 100 TPI floppy drive and try that with my > >> kryoflux. > > > > i dont know what kind of analysis stuff the kryoflux tools offer - but i > > can tell you that if it is the same format as used with the sfd1001, > > then you should be able to read *some* tracks correctly. the lowlevel > > encoding is the same gcr as found on 1541 (and all other cbm drives). > > you should be able to tell which lowlevel encoding is used by making a > > histogram of one track (again, no idea what the kryoflux tools let you > > do). > > > > and that said, 100tpi shugart drives seem to be extremely impossible to > > find these days. i'd rather look for a solution to read those disks with > > a PET or something :) > > I do have both SFD-1001 and CBM-8250 drives - but I doubt that the > format used for CBM-900 floppies is the CBM GCR encoded filesystem. > > I've come to the conclusion that it is only the mechanics that is > similar to SFD-1001. > > But I'm only guessing - later this week I'll be able to do more > investigations on the CBM-900 story. does the kryoflux software allow you to read a raw track and then display a histogram of the data? if so, try reading some of the first tracks of a disk, you should see either 2 (FM) or 3 (MFM/GCR) "peaks" in the histogram. if its the later, post the result and i can probably tell if its mfm or gcr :) -- http://www.hitmen-console.org http://magicdisk.untergrund.net http://www.pokefinder.org http://ftp.pokefinder.org Bestaubt sind unsere Bücher, der Bierkrug macht uns klüger. Das Bier schafft uns Genuss, die Bücher nur Verdruss! <Johann Wolfgang von Goethe> Message was sent through the cbm-hackers mailing listReceived on 2011-10-24 14:00:12
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