Thanks Lyle. My biggest impediment at the moment is not actually having a PC that has a floppy drive. :-o
The other is time…work has been crazy as indicated by Jensen’s CES keynote tonight where the chip that I’ve been working on was just announced! yea! 9,000,000,000 transistors! TTFN - Guy > On Jan 7, 2018, at 10:33 PM, Lyle Bickley <lbick...@bickleywest.com> wrote: > > 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 <cctalk@classiccmp.org> 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"