21 Dec
2012
21 Dec
'12
2:32 p.m.
On Friday (12/21/2012 at 02:28PM -0600), Tothwolf wrote:
On Fri, 21 Dec 2012, geneb wrote:
I developed a hard-sector emulator for the Heath/Zenith H-8 and H-89
platforms that used 720K, 3.5" media and emulated the 10-hole hard
sectored 5.25" media with a small micro.
Three years ago, I could find new Sony 3.5" drives that had the 720/1.44
media detection hardware (opto detector and additional logic) and used
these drives successfully in 720K mode (300 RPM, 250 Kbps MFM).
Two years ago, I found it impossible to find 3.5" drives that still had
that media detection electronics. There were all jammed at 1.44 and
the detector and everything else was never installed.
I'm quite sure we got in on the tail end of the 3.5" drive life cycle :-)
Chris
--
Chris Elmquist
On Thu, 20 Dec 2012, Chuck Guzis wrote:
I've yet to see one of these Samsung drives that has the options
required for the disk change signal and that can be configured to
disable high density (1.44MB) mode to force the drive into double
density (720K) only mode. I guess these are like the Teac drives in
that they made dozens, if not hundreds of different revisions/models
of these drives. On 12/20/2012 09:26 PM, geneb wrote:
Not really. Most of the Compaq desktop machines I've seen use
drives with no faceplate because the face is part of the front of
the case. Ahh, ok. I was expecting a different style drive.
Anything special?