28 Mar
2023
28 Mar
'23
5:02 p.m.
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