Hi Guy, I just copied several IBM 8" Maintenance Device (MD) Diskettes - and verified that the copies work on the IBM MD. They seem to be in an IBM 3x0 format (with a standard IBM VTOC).
Track 0 on the diskettes is 128 byte sectors, Tracks 1 through 76 are 256 byte sectors. The diskettes are DSSD. (So you need a Shugart 850/851 (or equivalent) to make the copies). I used both Teledisk and IMD - and both successfully captured and re-created the diskettes correctly. More in editing IBM images later... Cheers, Lyle On Fri, 5 Jan 2018 11:52:56 -0800 Guy Sotomayor via cctalk <[email protected]> wrote: > Hi, > > I now have a number of uCode diskettes for my IBM 4331. I would > somehow like to image them so: a) I have backups in case the floppies > themselves go bad b) be able to investigate their contents in case I > have to “merge” the contents of multiple floppies to make a single > good one > > These are all 8” diskettes. > > The complicating factors in all of this are: > a) any text (e.g. strings) are going to be in EBCDIC rather than ASCII > b) each uCode diskette was presumably serialized to the CPU it was for > c) not sure what the “on-disk” structure looks like > d) the only 8” diskette drives that I have are in IBM (non-PC) > equipment > > Any ideas/comments would be welcome. > > Thanks. > > TTFN - Guy > -- 73 AF6WS Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"
