10 Oct
2007
10 Oct
'07
12:43 p.m.
On 9 Oct 2007 at 20:21, Andrew Lynch wrote:
Does anyone have some 100TPI floppy disk drives they
would be willing to
sell? I think I will need at least two or three drives total so even if you
have only a single drive you can part with, I would appreciate an offer.
Insofar as I'm aware, Micropolis originated the 100 tpi format and
there were few followers. I recall that Micropolis even marketed
their own 2-drive box for a time. Not every old Micropolis drive you
see, however, will be 100 tpi. They also made 96 and 48 tpi drives.
Tandon TM-100-3M (Single sided) TM-100-4M (Double sided)and a couple
of MPI/CDC drives was about the extent of the cloning, as far as I
know. Some of the old CBM Pet drive boxes (8050/8250?) used
Micropolis drives; Vector was about the last one out of the bath with
their Tandon TM-100-4Ms. Bottom line is that they were made by only
a handful of manufacturers (if three is a handful), were never
common, and were pretty much history by 1980--and a fair number were
single-sided.
Cheers,
Chuck