17 Apr
2001
17 Apr
'01
3:58 p.m.
On Tue, 17 Apr 2001, Fred Cisin (XenoSoft) wrote:
On 16 Apr 2001, Frank McConnell wrote:
Fred, looking at the listing in the Pocket PCRef which shows a
Micropolis 1115-6 vice 1115-VI. Unfortunately, however, it
characterizes it as 720K DSQD which does not clarify a darn thing!
- don
> Micropolis had 2 major models of their
5.25" drive. One was 48TPI,...
> The other was 100 TPI, with 77 tracks, not to be confused with the far
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".
They might be right. I had heard that Micropolis came out later with a
96TPI, but I've never seen it. The date code and the double sided is
consistent with that. Is it really 2 sided? What kind of door assembly
does it have? But they might be mistaken, and have ASSUMED 96TPI due
to it not being
48TPI, and/or having about 80 tracks. I've even seen people label 720K
5.25" drives as being 1/2M, "because it's NOT a 360K".
Unfortunately, I no longer have my files of sales literature and spec
sheets, that would have at least let us compare that model number with
known older ones.
--
Fred Cisin cisin(a)xenosoft.com
XenoSoft http://www.xenosoft.com
PO Box 1236 (510) 558-9366
Berkeley, CA 94701-1236