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
