<s>
2M	B-Application
is	O
a	O
DOS	B-Device
program	O
by	O
the	O
Spanish	O
programmer	O
Ciriaco	O
García	O
de	O
Celis	O
.	O
</s>
<s>
It	O
enables	O
higher	O
than	O
normal	O
capacity	O
formatting	B-Application
of	O
floppy	B-Device
disks	I-Device
.	O
</s>
<s>
It	O
was	O
written	O
in	O
C	O
and	O
assembler	O
and	O
compiled	O
using	O
Borland	B-Application
C++	I-Application
3.1	O
.	O
</s>
<s>
The	O
program	O
consisted	O
of	O
two	O
major	O
components	O
:	O
2M	B-Application
and	O
2MGUI	B-Application
(	O
from	O
"	O
2M	B-Application
Guinness	I-Application
"	O
)	O
.	O
</s>
<s>
Of	O
these	O
,	O
2M	B-Application
was	O
the	O
main	O
program	O
enabling	O
the	O
formatting	B-Application
,	O
reading	O
and	O
writing	O
of	O
high	O
density	O
3.5	B-Device
"	I-Device
disks	O
formatted	O
to	O
a	O
capacity	O
of	O
either	O
1804	O
KiB	O
or	O
1886	O
KB	O
,	O
and	O
2MGUI	B-Application
was	O
a	O
proof-of-concept	O
program	O
that	O
demonstrated	O
the	O
ability	O
to	O
format	O
any	O
normal	O
high	O
density	O
3.5	B-Device
"	I-Device
disk	O
to	O
a	O
capacity	O
of	O
over	O
two	O
million	O
bytes	O
(	O
1972	O
KiB	O
)	O
on	O
any	O
disk	O
drive	O
.	O
</s>
<s>
Both	O
programs	O
implemented	O
disk	O
I/O	O
speedups	O
in	O
the	O
form	O
of	O
"	O
Sector	O
Sliding	O
"	O
and	O
"	O
DiskBoost	O
"	O
,	O
which	O
work	O
on	O
the	O
principle	O
of	O
ordering	O
the	O
physical	O
sectors	O
on	O
the	O
disk	O
to	O
facilitate	O
pauseless	O
reading	O
over	O
track	B-Device
changes	O
.	O
</s>
<s>
2MGUI	B-Application
utilized	O
bit	B-Algorithm
banging	I-Algorithm
and	O
tricked	O
the	O
floppy	B-Device
controller	I-Device
into	O
writing	O
a	O
full	O
track	B-Device
of	O
data	O
as	O
a	O
single	O
sector	O
before	O
resetting	O
the	O
floppy	B-Device
controller	I-Device
in	O
order	O
to	O
avoid	O
overwriting	O
the	O
next	O
track	B-Device
,	O
enabling	O
the	O
absolute	O
maximum	O
capacity	O
possible	O
at	O
the	O
physical	O
level	O
.	O
</s>
<s>
A	O
similar	O
technique	O
was	O
also	O
used	O
by	O
Vincent	O
Joguin	O
's	O
Disk2FDI	O
for	O
Amiga	O
floppies	B-Device
.	O
</s>
