Picture up (RE: Microsci HAVAC)

From: Eric Smith <eric_at_brouhaha.com>
Date: Mon Oct 12 20:08:48 1998

"Fred Cisin (XenoSoft)" <cisin_at_xenosoft.com> wrote:
> IBM started with Tandon TM100-2.

No, with the IBM PC (model 5150), they started with the TM100-1, a 40 track
single sided disk. In PC-DOS 1.0 they only used 8 sectors per track, for a
total disk capacity of 160K. In PC-DOS 1.1 they added support for the 9
sector format, increasing the capacity to 180K.

IIRC, the dual-sided drives were not available (from IBM) until the
introduction of PC-DOS 2.0.

To this day, the MS-DOS format command still has options for single-sided
and 8 SPT formats.

Eric
Received on Mon Oct 12 1998 - 20:08:48 BST