Terry & all, To be clear - SD on a "360K" floppy is 180K? Yes?
Also, what's meant by a "1a"? My mainboard is marked "Rev A" but the machine was made in late 1982, so I have a hard time believing it's really the original Ver. A that shipped in the very early units. The board & parts compliment endured multiple revisions, I'd expect a late-82 board to be in the Ver. F range - particularly with a 1.4 ROM. Did they pull first-rev boards and stuff them in the new cases, with latest ROMs and the DD daughtercard? On Mon, Aug 17, 2015 at 7:55 PM, Terry Stewart <te...@webweavers.co.nz> wrote: > >I've got this hazy memory saying that the boot area (or possibly just the > first track?) of the 'DD' CP/M disk might still be FM, though, even > >though the rest of the disk isn't, and so it needs a FM-capable controller > to write out an image. Maybe I'm mixing that up with a different system, > though.. > > I think you might be. I have an Osborne 1a with the DD modification. I > can make good Osborne boot disks for it in a 360k floppy drive using > Imagedisk on my Pentium II. The latter can't write single density at all > though. > > Tez >