18 Aug
2015
18 Aug
'15
1:42 a.m.
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 <terry at 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