"Fred Cisin (XenoSoft)" <cisin_at_xenosoft.com> wrote:
> Micropolis had 2 major models of their 5.25" drive. One was 48TPI, with
> 35 tracks (maybe 40), and was essentially interchangeable with the Shugart
> SA400. It was fairly slow stepping, since it used a helical lead screw.
> But it was a nice drive for TRS-80.
>
> The other was 100 TPI, with 77 tracks, not to be confused with the far
> more common 96TPi 80 track drives. There is a somewhat rare Tandon
> TM100-4M drive that can be used as a substitute for the Micropolis.
> (Some think that the 'M' stands for Micropolis as replacing the Micropolis
> 100TPI is its only use.)
Hmm, here I sit looking at one of a pair of Micropolis model 1115-VI.
It's a 5.25" full-height drive, serial 0372. Someone (not me) helpfully
wrote on it with a marker:
96 TPI
2 SIDED
5 1/4
Date codes on the ICs would seem to place its manufacture sometime
in early-mid 1983.
Was the someone with the marker perhaps mistaken?
Hard to tell from
http://www.mfarris.com/know/floppy/floppy2.html --
that doesn't seem to get any more specific than "SD"/"DD"/"QD"/"HD".
-Frank McConnell
Received on Tue Apr 17 2001 - 00:38:03 BST