Fred Cisin cisin at xenosoft.com
Mon Nov 19 16:59:10 CST 2007

> > Micropolis made excellent floppy drives.  It is too bad that their hard
> > drives sucked.
> > Did anybody ever use their OS?  (bundled with some of their 5.25" floppy
> > drives)

On Mon, 19 Nov 2007, woodelf wrote:
> Never heard of that.

It came in a white loose-leaf binder, with 5.25" floppy disk in 1979

> I just can't remember what drives I seen used around 1990
> but I do know the hacked into to DOS to give you very large drives for the time.
> I think 8K sectors rather than 512 sectors under standard DOS.
Changing the sector size was one of the simplest ways to get around some
of the DOS size limits.  For example, MS-DOS through version 3.30 was
limited to a maximum of 65,536 sectors on a logical drive (which is the
source of the 32MB limit)

The 2GB limit was due to MICROS~1 using a signed, rather than unsigned,
long integer.  'Course that did make it possible to have a file with
-2147483648 bytes :-)

More information about the cctalk mailing list