<s>
The	O
CMD	B-Device
FD	I-Device
series	I-Device
was	O
Creative	O
Micro	O
Designs	O
(	O
CMD	O
)	O
'	O
s	O
range	O
of	O
third-party	O
floppy	B-Device
disk	I-Device
drives	I-Device
for	O
the	O
Commodore	O
8-bit	O
line	O
of	O
home	O
computers	O
.	O
</s>
<s>
Using	O
3½	O
"	O
floppy	B-Device
disks	I-Device
,	O
they	O
provided	O
a	O
significantly	O
larger	O
storage	O
capacity	O
than	O
Commodore-produced	O
drives	O
;	O
the	O
FD-2000	O
offered	O
1600	O
kB	O
of	O
storage	O
using	O
standard	O
double-sided	O
,	O
high-density	O
floppies	B-Device
,	O
while	O
the	O
FD-4000	O
also	O
allowed	O
the	O
use	O
of	O
3200	O
kB	O
extra-high	B-Device
density	I-Device
(	O
ED	O
)	O
floppies	B-Device
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
higher	O
storage	O
capacity	O
,	O
the	O
FD	B-Device
series	I-Device
also	O
provided	O
additional	O
features	O
not	O
found	O
on	O
the	O
Commodore	O
1581	O
.	O
</s>
<s>
It	O
also	O
provided	O
a	O
"	O
1541	O
emulation	O
mode	O
"	O
,	O
allowing	O
partitions	O
on	O
a	O
3½	O
"	O
disk	O
to	O
simulate	O
the	O
behavior	O
of	O
a	O
5¼	O
"	O
Commodore	B-Device
1541	I-Device
floppy	B-Device
.	O
</s>
<s>
A	O
real-time	O
clock	O
was	O
also	O
available	O
as	O
an	O
add-on	O
feature	O
;	O
it	O
could	O
be	O
used	O
to	O
time-stamp	O
files	O
and	O
to	O
automatically	O
set	O
the	O
system	O
clock	O
in	O
the	O
GEOS	B-Device
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
The	O
CMD	B-Device
FD	I-Device
series	I-Device
also	O
included	O
native	O
JiffyDOS	O
compatibility	O
;	O
while	O
using	O
the	O
JiffyDOS	O
system	O
with	O
a	O
Commodore	O
drive	O
required	O
replacing	O
both	O
the	O
KERNAL	B-Operating_System
and	O
drive	O
ROM	B-Device
chips	I-Device
,	O
for	O
full	O
JiffyDOS	O
use	O
,	O
only	O
the	O
computer	O
's	O
KERNAL	B-Operating_System
ROM	B-Device
needed	O
to	O
be	O
replaced	O
when	O
used	O
in	O
conjunction	O
with	O
an	O
FD-2000	O
or	O
FD-4000	O
.	O
</s>
