<s>
The	O
MacCharlie	B-Device
is	O
a	O
hardware	O
add-on	O
for	O
the	O
Apple	O
Macintosh	B-Device
that	O
was	O
made	O
by	O
Dayna	O
Communications	O
.	O
</s>
<s>
The	O
name	O
refers	O
to	O
an	O
IBM	B-Device
PC	I-Device
advertising	O
campaign	O
of	O
the	O
time	O
featuring	O
Charlie	O
Chaplin	O
's	O
"	O
Little	O
Tramp	O
"	O
character	O
.	O
</s>
<s>
It	O
allows	O
users	O
to	O
run	O
DOS	B-Device
software	O
for	O
the	O
IBM	B-Device
PC	I-Device
by	O
clipping	O
a	O
unit	O
onto	O
the	O
chassis	O
of	O
the	O
Macintosh	B-Device
128K	I-Device
,	O
as	O
well	O
as	O
a	O
keyboard	O
extender	O
to	O
provide	O
the	O
function	O
keys	O
and	O
numeric	O
keypad	O
that	O
are	O
absent	O
from	O
Apple	O
's	O
original	O
keyboard	O
.	O
</s>
<s>
The	O
clip-on	O
unit	O
sits	O
to	O
the	O
side	O
of	O
the	O
Mac	O
and	O
,	O
like	O
the	O
contemporary	O
Amiga	B-Device
Sidecar	I-Device
,	O
contains	O
essentially	O
a	O
complete	O
IBM	B-Device
PC	I-Device
compatible	O
with	O
an	O
8088	B-Device
processor	O
,	O
256	O
KB	O
of	O
RAM	B-Architecture
(	O
expandable	O
to	O
640	O
KB	O
)	O
and	O
a	O
single	O
5.25	B-Device
"	I-Device
floppy	B-Device
disk	I-Device
drive	I-Device
that	O
stores	O
360	O
KB	O
.	O
</s>
<s>
A	O
second	O
floppy	B-Device
drive	I-Device
can	O
be	O
added	O
.	O
</s>
<s>
While	O
running	O
DOS	B-Device
software	O
,	O
users	O
can	O
still	O
access	O
the	O
Macintosh	B-Device
menu	O
bar	O
and	O
desk	B-Application
accessories	I-Application
.	O
</s>
<s>
However	O
,	O
the	O
DOS	B-Device
environment	O
,	O
which	O
runs	O
in	O
a	O
window	O
,	O
is	O
text-only	O
and	O
does	O
not	O
permit	O
Macintosh	B-Device
applications	O
to	O
run	O
concurrently	O
while	O
in	O
use	O
.	O
</s>
<s>
MacCharlie	B-Device
uses	O
the	O
Mac	O
as	O
a	O
terminal	B-Application
,	O
performing	O
all	O
DOS	B-Device
processing	O
itself	O
,	O
and	O
sends	O
video	O
data	O
over	O
a	O
relatively	O
slow	O
serial	O
link	O
to	O
the	O
Mac	O
for	O
display	O
.	O
</s>
<s>
This	O
slowness	O
,	O
coupled	O
with	O
the	O
declining	O
prices	O
of	O
real	O
IBM	B-Device
PC	I-Device
compatibles	O
,	O
contributed	O
to	O
the	O
short	O
market	O
life	O
of	O
the	O
MacCharlie	B-Device
.	O
</s>
