Disc Imaging / Kryoflux - Acorn ADFS 800KB

On Sat, 2 Jul 2016, Austin Pass wrote: Although there will be a slight loss of long-term reliability (not an issue here), you can cover the media sensing hole of a 1.4M diskette and format it into 720K FORMAT B: /F:2 FORMAT B: /F:720 FORMAT B: /T:80/N:9 (all do the same thing) Then copy some files to it, so that there will be something interesting to see. That will be similar enough to the Acorn diskettes (if we are right about the details of the Acorn format). AND, then if those don't work either, then the Kryoflex forums won't get sidetracked into thinking that it is an Acorn issue. I think that THAT would be inevitable if you don't separate out whether the problem is with Kryoflex V Acorn! Is the capacity of the diskette 800K? or is that merely the name of the type of the diskette, with an actual capacity of somewhere between 640K and 800K? If the actual capacity is 800K, with MFM, then it would probably be 80 track, double sided, with either 10 512 byte sectors or 5 1024 byte sectors per track. (can't get up to 800K with "normal" WD style MFM with 256 bytes per sector, and 512 byte sectors are a little tight) If so, then it should be feasible to copy sectors from those disks in MS-DOS on a 5150 or 5160, using INT13h. Don't know whether it could be done in Windoze8. AFTER you get it working for all functions that you need with simple stuff, you should be able to do 8" with it. The 8" interface and behavior is virtually identical to that of a 5.25" 1.2M! Only a few pins need rearrangement on a 50 pin to 34 pin cable. If you want to WRITE to 8", then you may want to also deal with TG43. There is a commercial adapter (FDADAP) for that, which would also take care of the rest of the cabling. Be aware that power supplies are not standardized for 8"; you'll need to make your own if you get a drive without one. -- Grumpy Ol' Fred cisin at xenosoft.com