<s>
The	O
Commodore	B-Device
1570	I-Device
is	O
a	O
5¼	O
"	O
floppy	B-Device
disk	I-Device
drive	I-Device
for	O
the	O
Commodore	B-Device
128	I-Device
home/personal	O
computer	O
.	O
</s>
<s>
It	O
is	O
a	O
single-sided	O
,	O
170	O
kB	O
version	O
of	O
the	O
Commodore	B-Device
1571	I-Device
,	O
released	O
as	O
a	O
stopgap	O
measure	O
when	O
Commodore	O
International	O
was	O
unable	O
to	O
provide	O
sufficient	O
quantities	O
of	O
1571s	O
due	O
to	O
a	O
shortage	O
of	O
double-sided	O
drive	O
mechanisms	O
(	O
which	O
were	O
supplied	O
by	O
an	O
outside	O
manufacturer	O
)	O
.	O
</s>
<s>
Like	O
the	O
1571	O
,	O
it	O
can	O
read	O
and	O
write	O
both	O
GCR	B-Device
and	O
MFM	B-Protocol
disk	O
formats	O
.	O
</s>
<s>
The	O
1570	O
utilizes	O
a	O
1571	O
logic	O
board	O
in	O
a	O
cream-colored	O
original-1541-like	O
case	O
with	O
a	O
drive	O
mechanism	O
similar	O
to	O
the	O
1541	O
's	O
except	O
that	O
it	O
was	O
equipped	O
with	O
track-zero	O
detection	O
.	O
</s>
<s>
Its	O
ROM	B-Device
also	O
contains	O
some	O
DOS	O
bug	O
fixes	O
that	O
did	O
n't	O
appear	O
in	O
the	O
1571	O
until	O
much	O
later	O
.	O
</s>
<s>
The	O
1570	O
can	O
read	O
and	O
write	O
all	O
single-sided	O
CP/M	B-Application
-format	O
disks	O
that	O
the	O
1571	O
can	O
access	O
.	O
</s>
<s>
The	O
drive	O
uses	O
the	O
CPU	O
MOS	B-General_Concept
6502	I-General_Concept
,	O
floppy	B-Device
controller	O
WD1770	B-Device
or	O
WD1772	O
,	O
I/O	O
controllers	O
2x	O
MOS	B-Device
Technology	I-Device
6522	I-Device
and	O
1x	O
MOS	B-Device
Technology	I-Device
6526	I-Device
.	O
</s>
