On 3/28/23 15:31, Ali via cctalk wrote:

> 
> I don't know if we are talking about different things? You are speaking about 
> a 3 Mode drive that allows 1.2MB on 3.5" drives. I am asking about a Tri 
> Density (as in SD, HD, ED, TD) drive. Supposedly these drives were going to 
> use longitudinal recording (vs. the perpendicular recording used in ED 
> drives) to fit 12.5MB on a 3.5" disk. I had linked a press release in the OP: 
> 
Oh, you mean the Japanese TD disks.   As far as I know only one machine
was produced that used them, the NEC PC 88-VA3:

https://necretro.org/PC-88_VA3

It was an expensive market flop.  You might try to hunt down a drive if
you're a collector, but as far as I know, the PC88-VA3 systems never
made it outside of Japan.

Still have my Caleb UHD144 drives, though--144MB on a 3.5" preformatted
floppy.  Drive also reads and writes 1.44M and 720K floppies.

And, then there was the Sony HiFD--another disaster.

https://pro.sony/s3/cms-static-content/operation-manual/3864865212.pdf

--Chuck


Reply via email to