8 Sep
2006
8 Sep
'06
12:25 p.m.
On Friday 08 September 2006 13:42, Chuck Guzis wrote:
On 9/8/2006 at 10:01 AM Mr Ian Primus wrote:
FWIW, I tried hooking one of these up to a catweasel 3 in a PC, and
while it could read "1.2MB" floppies just fine, I couldn't get Tim
Mann's catweasel utilities to recognize any MFM or other encoding on
the data stream that the catweasel card was reading off the 2.4MB disks
I've got (which are IBM 3174 microcode disks).
Pat
--
Purdue University Research Computing -- http://www.itap.purdue.edu/rcac
I've seen them used in IBM terminal
controllers as
microcode floppies. The drives for said terminal
controllers are easy to find - I have many. Disks are
scarcer. I don't know if the IBM 2.4 meg disk is the
same as the ones used by the Kaypro. I also don't know
much about how the format works.
I think we're talking about two different technologies here. IBM
used a drive made by YE data that, while 80 cylinder, packed the data
much more densely on each track. The Drivetec variety used dual
positioners in connection with a servo track to get 160 cylinders (at
600 RPM).
In either case, floppies for them are pretty rare.
However, I wonder what would happen if one formatted the IBM variety
using a 3.5' 2.88MB-capable PC controller.