17 Aug
2015
17 Aug
'15
11:25 p.m.
Gents,
Do remember that I'm fairly confident this is a DD machine (the described
daughterboard and v1.4 ROM are present), so the ability to write +SD+ might
not be of concern. It would be nice if the PC could do both, though..
So is there a difference between SD and DD CP/M - Osborne disk images? I
mean, other than the obvious storage capacity issue wherein the DD holds
roughly 2X the data.
If there's such a thing as an "SD" image, can it be written to a DD floppy
and still operate correctly?
On Mon, Aug 17, 2015 at 6:09 PM, Fred Cisin <cisin at xenosoft.com> wrote:
Any sense of what PC models / controllers are capable
of this task?
On
Mon, 17 Aug 2015, Chris Osborn wrote:
Anything that will run ImageDisk or Teledisk will
work. It doesn?t
necessarily have to be one of those computers, you could pull the 360k
drives from one of them and hook them into a ?newer? PC that still has
5.25? 360k floppy support. There?s usually 360k floppy support on
motherboards up to the Pentium III era.
There are plenty of PCs that can run ImageDisk and/or Teledisk that CAN
NOT do single density (FM). Neither of those pieces of software alter the
hardware capabilities of the machine.
I personally use an old ABIT KT7A-RAID board which has a controller which
is capable of writing single-density/FM disks.
I?ve got a half-height 5.25?
360k drive in it connected as drive B and a 3.5? 1.44M as drive A. I?ve
used it quite often to create disks from my original TRS-80 Model I which
can only do SSSD. I?ve also used it to make disks for the Kaypro and even
make disks for my HP-150 which uses single-sided 3.5? disks.
It is good that YOUR machine has FM/single-density capability.
And, yes, if your machine can do TRS-80 Model 1, then it can do Osborne
single density - those two machine use almost the same physical format
(except for D.A.M. issues on TRS-80). The first day that I saw an
Osborne, I looked at sectors on those disks using Superzap (Model 1
Newdos), and Trakcess.
--
Grumpy Ol' Fred cisin at xenosoft.com