24 Apr
2013
24 Apr
'13
9:44 p.m.
If I can be of any help, I have a Kaypro 10 here that is booting reliably
from an internal 10MB HD.
No system disks here, but I do have modems and one very effective hardware
telephone line emulator.
On Wed, Apr 24, 2013 at 1:11 AM, Jim Brain <brain at jbrain.com> wrote:
On 4/24/2013 12:22 AM, Tothwolf wrote:
On Wed, 24 Apr 2013, Terry Stewart wrote:
At this point, I wasn't so much worried about long term usage. If I can
boot the unit with the disk, I'd load some utility and create an image on
the unit itself.
If you then read/write a 360K disk in a true 360K drive that was written
On Wed, Apr 24, 2013 at 3:55 PM, Tothwolf
<tothwolf at concentric.net>
wrote:
Is it even possible to write reliable 360K disk using a 1.2MB drive? It
Is this reliable in the long-term though?
had been ages since I worked with some of these
drives since a lot of my
stuff is packed away, but I seem to remember that I always had to use a
360K drive when /writing/ 360K disks, while I could still read 360K
disks
in a 1.2MB drive just fine. (The tracks written by a 1.2MB drive are
narrower than those written by a 360K drive?)
Yes, it's possible to write a 360k disk in a 1.2MB drive. See
http://www.classic-computers.**org.nz/blog/2010-02-18-**
writing-cpm-from-1.2mb-disks.**htm<http://www.classic-computers.org.nz/blog/2010-02-18-writing-cpm-from-1.2mb-disks.htm>
to in a 1.2MB drive, won't you have odd
issues with the track widths? What
I seem to remember from years ago was a 1.2MB drive could not reliably
overwrite data on a 360K disk because the tracks written by a 1.2MB drive
were narrower, so when you would then work with that disk in a 360K drive,
the 360K drive would pick up data from the original wider 360K drive track
and the narrower 1.2MB drive track. Maybe this would work ok to a limited
degree with a 360K floppy that had been bulk-erased prior to writing in a
1.2MB drive, which was then never written to again in a 1.2MB drive after
being written to in a 360K drive?
I am using truly blank diskettes, and I'm not intending to write to the
disks after creation.
Jim
--
Jim Brain
brain at jbrain.com
www.jbrain.com