<s>
The	O
Amiga	B-Device
computer	I-Device
can	O
be	O
used	O
to	O
emulate	B-Application
several	O
other	O
computer	O
platforms	O
,	O
including	O
legacy	O
platforms	O
such	O
as	O
the	O
Commodore	O
64	O
,	O
and	O
its	O
contemporary	O
rivals	O
such	O
as	O
the	O
IBM	B-Device
PC	I-Device
and	O
the	O
Macintosh	B-Device
.	O
</s>
<s>
MS-DOS	B-Application
compatibility	O
was	O
a	O
major	O
issue	O
during	O
the	O
early	O
years	O
of	O
the	O
Amiga	B-Device
's	O
lifespan	O
in	O
order	O
to	O
promote	O
the	O
machine	O
as	O
a	O
serious	O
business	O
machine	O
.	O
</s>
<s>
In	O
order	O
to	O
run	O
the	O
MS-DOS	B-Application
operating	O
system	O
,	O
Commodore	O
released	O
the	O
Sidecar	B-Device
for	O
the	O
Amiga	B-Device
1000	I-Device
,	O
basically	O
an	O
8088	B-Device
board	O
in	O
a	O
closed	O
case	O
that	O
connected	O
to	O
the	O
side	O
of	O
the	O
Amiga	B-Device
.	O
</s>
<s>
Clever	O
programming	O
(	O
a	O
library	O
named	O
Janus	B-Application
,	O
after	O
the	O
two-faced	O
Roman	O
god	O
of	O
doorways	O
)	O
made	O
it	O
possible	O
to	O
run	O
PC	O
software	O
in	O
an	O
Amiga	B-Device
window	O
without	O
use	O
of	O
emulation	B-Application
.	O
</s>
<s>
At	O
the	O
introduction	O
of	O
the	O
Sidecar	B-Device
the	O
crowd	O
was	O
stunned	O
to	O
see	O
the	O
MS-DOS	B-Application
version	O
of	O
Microsoft	B-Operating_System
Flight	I-Operating_System
Simulator	I-Operating_System
running	O
at	O
full	O
speed	O
in	O
an	O
Amiga	B-Device
window	O
on	O
the	O
Workbench	O
.	O
</s>
<s>
Later	O
the	O
Sidecar	B-Device
was	O
implemented	O
on	O
an	O
expansion	O
card	O
named	O
"	O
Bridgeboard	O
"	O
and	O
was	O
released	O
as	O
the	O
for	O
Amiga	O
2000+	O
models	O
.	O
</s>
<s>
Bridgeboard	O
models	O
based	O
on	O
the	O
Intel	B-General_Concept
80286	I-General_Concept
and	O
80386	B-General_Concept
CPUs	O
were	O
later	O
released	O
by	O
Commodore	O
as	O
the	O
and	O
.	O
</s>
<s>
The	O
Bridgeboard	O
card	O
and	O
the	O
Janus	B-Application
library	O
made	O
the	O
use	O
of	O
PC	O
expansion	O
cards	O
and	O
harddisk/floppydisk	O
drives	O
possible	O
.	O
</s>
<s>
Later	O
third	O
party	O
cards	O
also	O
appeared	O
for	O
the	O
Amiga	B-Device
500	I-Device
and	O
Amiga	B-Device
600	I-Device
expansion	O
slot	O
such	O
as	O
the	O
,	O
and	O
Vortex	O
released	O
full-length	O
cards	O
for	O
the	O
Amiga	O
2000+	O
based	O
on	O
the	O
80386	B-General_Concept
and	O
80486	O
CPUs	O
called	O
the	O
.	O
</s>
<s>
Eventually	O
,	O
full-software	O
emulators	O
,	O
such	O
as	O
PC-Task	O
and	O
PCx	O
allowed	O
Amigas	B-Device
to	O
run	O
MS-DOS	B-Application
programs	O
,	O
including	O
Microsoft	B-Application
Windows	I-Application
,	O
without	O
additional	O
hardware	O
,	O
at	O
the	O
costs	O
of	O
speed	O
and	O
compatibility	O
.	O
</s>
<s>
Dutch	O
Amiga	B-Device
Kolff	O
Computer	O
Supplies	O
built	O
a	O
similar	O
expansion	O
for	O
the	O
A500	O
.	O
</s>
<s>
It	O
was	O
later	O
improved	O
so	O
it	O
could	O
emulate	B-Application
VGA	B-Protocol
.	O
</s>
<s>
When	O
Commodore	O
introduced	O
the	O
Amiga	B-Device
1000	I-Device
in	O
July	O
1985	O
it	O
also	O
unexpectedly	O
announced	O
a	O
software-based	O
IBM	B-Device
PC	I-Device
emulator	B-Application
for	O
it	O
.	O
</s>
<s>
The	O
company	O
demonstrated	O
the	O
emulator	B-Application
by	O
booting	O
IBM	B-Operating_System
PC	I-Operating_System
DOS	I-Operating_System
and	O
running	O
Lotus	B-Application
1-2-3	I-Application
.	O
</s>
<s>
Some	O
who	O
attended	O
the	O
demonstration	O
were	O
skeptical	O
that	O
the	O
emulator	B-Application
,	O
while	O
impressive	O
technically	O
,	O
could	O
run	O
with	O
acceptable	O
performance	O
.	O
</s>
<s>
The	O
application	O
,	O
called	O
Transformer	O
,	O
was	O
indeed	O
extremely	O
slow	O
;	O
The	O
'	O
Landmark	O
 '	O
benchmark	O
rated	O
it	O
as	O
a	O
300kHz	O
286	B-General_Concept
,	O
far	O
slower	O
than	O
the	O
4.7MHz	O
of	O
IBM	O
's	O
oldest	O
and	O
slowest	O
PC	O
.	O
</s>
<s>
In	O
addition	O
,	O
it	O
would	O
only	O
run	O
on	O
Amigas	B-Device
using	O
the	O
68000	B-Device
microprocessor	I-Device
,	O
and	O
would	O
not	O
run	O
if	O
the	O
Amiga	B-Device
had	O
more	O
than	O
512K	O
of	O
RAM	O
.	O
</s>
<s>
PCTask	O
is	O
a	O
software	O
PC	B-Application
emulator	I-Application
emulating	B-Application
PC	O
Intel	O
hardware	O
with	O
8088	B-Device
processor	I-Device
and	O
CGA	B-Device
graphic	O
modes	O
.	O
</s>
<s>
The	O
latest	O
version	O
of	O
it	O
(	O
4.4	O
)	O
was	O
capable	O
to	O
emulate	B-Application
an	O
80386	B-General_Concept
clocked	O
at	O
12MHz	O
and	O
features	O
include	O
support	O
for	O
up	O
to	O
16	O
MiB	O
RAM	O
(	O
15	O
MB	O
extended	O
)	O
under	O
MS-DOS	B-Application
,	O
up	O
to	O
two	O
floppy	B-Device
drives	I-Device
and	O
2	O
hard	O
drives	O
.	O
</s>
<s>
The	O
emulator	B-Application
could	O
make	O
use	O
of	O
hardfile	O
devices	O
and	O
then	O
it	O
could	O
handle	O
multiple	O
hard	O
disk	B-Device
files	O
and	O
hard	O
disk	B-Device
partitions	O
.	O
</s>
<s>
It	O
supported	O
high	O
Density	O
floppies	B-Device
and	O
CD-ROM	B-Device
if	O
the	O
Amiga	B-Device
hardware	O
had	O
mounted	O
those	O
devices	O
.	O
</s>
<s>
The	O
graphics	O
mode	O
available	O
were	O
MDA	B-Device
,	O
CGA	B-Device
,	O
EGA	B-Device
,	O
VGA	B-Protocol
and	O
SVGA	O
emulating	B-Application
Hercules	B-Device
graphic	O
cards	O
with	O
512	O
KiB	O
to	O
2	O
MiB	O
RAM	O
,	O
and	O
up	O
to	O
256	O
colors	O
on	O
Amiga	B-Device
AGA	O
machines	O
,	O
and	O
could	O
make	O
use	O
of	O
Amiga	B-Device
graphic	O
boards	O
(	O
e.g.	O
</s>
<s>
Parallel	O
,	O
Serial	O
and	O
PC	O
speaker	O
emulation	B-Application
,	O
and	O
mouse	O
support	O
,	O
including	O
serial	O
mouse	O
emulation	B-Application
were	O
also	O
granted	O
.	O
</s>
<s>
If	O
the	O
Amiga	B-Device
hardware	O
is	O
fast	O
enough	O
(	O
68060	B-General_Concept
or	O
PPC	O
)	O
and	O
has	O
enough	O
RAM	O
,	O
there	O
could	O
be	O
also	O
the	O
possibility	O
to	O
run	O
multiple	O
PC-Task	O
processes	O
on	O
the	O
same	O
machine	O
,	O
run	O
MS-DOS	B-Application
applications	O
in	O
an	O
Amiga	B-Device
window	O
on	O
a	O
public	O
screen	O
(	O
e.g.	O
</s>
<s>
on	O
Amiga	B-Device
Workbench	O
GUI	O
)	O
.	O
</s>
<s>
PCTask	O
could	O
also	O
transfer	O
files	O
between	O
Amiga	B-Device
side	O
and	O
the	O
emulated	B-Application
MS-DOS	B-Application
machine	O
;	O
it	O
could	O
make	O
use	O
of	O
GoldenGate	O
bridge	O
cards	O
which	O
allow	O
the	O
Amiga	B-Device
equipped	O
with	O
expansion	O
slots	O
to	O
get	O
complete	O
control	O
of	O
its	O
silent	O
ISA	O
slots	O
and	O
use	O
PC-ISA	O
cards	O
.	O
</s>
<s>
And	O
latest	O
version	O
of	O
it	O
(	O
4.4	O
)	O
could	O
run	O
even	O
Microsoft	B-Application
Windows	I-Application
up	O
to	O
95	O
.	O
</s>
<s>
PcTask	O
has	O
an	O
8088/80286/80486	O
JITM	O
(	O
Just	O
in	O
Time	O
Machine	O
)	O
capable	O
to	O
map	O
all	O
instructions	O
of	O
these	O
processors	O
,	O
but	O
require	O
4	O
megabytes	O
extra	O
of	O
RAM	O
for	O
activating	O
this	O
feature	O
.	O
</s>
<s>
Also	O
introduced	O
for	O
the	O
Amiga	B-Device
were	O
two	O
products	O
,	O
A-Max	O
(	O
both	O
internal	O
and	O
external	O
models	O
)	O
and	O
the	O
Emplant	O
expansion	O
card	O
.	O
</s>
<s>
Both	O
allowed	O
the	O
Amiga	B-Device
to	O
emulate	B-Application
an	O
Apple	O
Macintosh	B-Device
and	O
run	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
.	O
</s>
<s>
It	O
required	O
an	O
Apple	O
Macintosh	B-Device
ROM	O
image	O
,	O
or	O
actual	O
ROMs	O
in	O
the	O
case	O
of	O
A-Max	O
,	O
which	O
needed	O
to	O
be	O
obtained	O
from	O
a	O
real	O
Macintosh	B-Device
.	O
</s>
<s>
The	O
user	O
needed	O
to	O
own	O
the	O
real	O
Macintosh	B-Device
or	O
Mac	O
ROMs	O
to	O
legally	O
run	O
the	O
emulator	B-Application
.	O
</s>
<s>
In	O
1988	O
the	O
first	O
Apple	O
Mac	O
emulator	B-Application
,	O
A-Max	O
,	O
was	O
released	O
as	O
an	O
external	O
device	O
for	O
any	O
Amiga	B-Device
.	O
</s>
<s>
It	O
needed	O
Mac	O
ROMs	O
to	O
function	O
,	O
and	O
could	O
read	O
Mac	O
disks	O
when	O
used	O
with	O
a	O
Mac	O
floppy	B-Device
drive	I-Device
(	O
Amiga	B-Device
floppy	B-Device
drives	I-Device
are	O
unable	O
to	O
read	O
Mac	O
disks	O
.	O
</s>
<s>
Unlike	O
Amiga	B-Device
disks	O
Mac	O
floppy	B-Device
disks	I-Device
spin	O
at	O
variable	O
speeds	O
,	O
much	O
like	O
CD-ROM	B-Device
drives	O
)	O
.	O
</s>
<s>
A-Max	O
II	O
was	O
contained	O
on	O
a	O
Zorro-compatible	O
card	O
and	O
allowed	O
the	O
user	O
,	O
again	O
using	O
actual	O
Mac	O
ROMs	O
,	O
to	O
emulate	B-Application
a	O
color	O
Macintosh	B-Device
.	O
</s>
<s>
In	O
fact	O
,	O
an	O
Amiga	B-Device
3000	I-Device
emulating	B-Application
a	O
Mac	O
via	O
A-Max	O
II	O
was	O
significantly	O
faster	O
than	O
the	O
first	O
consumer	O
color	O
Mac	O
,	O
the	O
LC	O
.	O
</s>
<s>
Example	O
virtualization	O
software	O
include	O
ShapeShifter	B-Application
(	O
not	O
to	O
be	O
confused	O
with	O
the	O
third	O
party	O
preference	O
pane	O
ShapeShifter	B-Application
)	O
,	O
later	O
superseded	O
by	O
Basilisk	B-Application
II	I-Application
(	O
both	O
by	O
the	O
same	O
programmer	O
who	O
conceived	O
SheepShaver	B-Application
,	O
Christian	O
Bauer	O
)	O
,	O
Fusion	O
and	O
iFusion	O
(	O
the	O
latter	O
ran	O
classic	B-Application
Mac	I-Application
OS	I-Application
by	O
using	O
a	O
PowerPC	B-Architecture
"	O
coprocessor	O
"	O
accelerator	O
card	O
)	O
.	O
</s>
<s>
Virtual	B-Architecture
machines	I-Architecture
provide	O
equal	O
or	O
faster	O
speed	O
than	O
a	O
Macintosh	B-Device
with	O
the	O
same	O
processor	O
,	O
especially	O
with	O
respect	O
to	O
the	O
m68k	O
series	O
due	O
to	O
real	O
Macs	O
running	O
in	O
MMU	B-General_Concept
trap	O
mode	O
,	O
hampering	O
performance	O
.	O
</s>
<s>
Also	O
,	O
immediately	O
after	O
the	O
68k	O
to	O
PowerPC	B-Architecture
transition	O
in	O
1994	O
,	O
there	O
was	O
a	O
dearth	O
of	O
native	O
PowerPC	B-Architecture
Mac	O
software	O
:	O
Amiga	B-Device
computers	I-Device
with	O
68060	B-General_Concept
CPUs	O
running	O
ShapeShifter	B-Application
or	O
Fusion	O
were	O
able	O
to	O
run	O
68k	O
Macintosh	B-Device
code	O
faster	O
than	O
real	O
Macs	O
.	O
</s>
<s>
One	O
should	O
note	O
that	O
although	O
Amigas	B-Device
were	O
very	O
successful	O
at	O
emulating	B-Application
Macintoshes	B-Device
,	O
it	O
was	O
never	O
considered	O
to	O
be	O
a	O
Macintosh	B-Device
clone	I-Device
as	O
it	O
could	O
not	O
use	O
Mac	B-Application
OS	I-Application
as	O
a	O
primary	O
operating	O
system	O
.	O
</s>
<s>
Modern	O
Amigas	B-Device
like	O
AmigaOne	B-Device
and	O
Pegasos	B-Device
can	O
emulate	B-Application
Macintosh	B-Device
Machines	O
by	O
using	O
Basilisk	B-Application
II	I-Application
or	O
Mac-on-Linux	O
.	O
</s>
<s>
Various	O
Commodore	O
64	O
emulators	B-Application
were	O
produced	O
for	O
the	O
Amiga	B-Device
.	O
</s>
<s>
reviewed	O
ReadySoft	O
's	O
The	O
64	O
Emulator	B-Application
and	O
Software	O
Insight	O
Systems	O
 '	O
GO-64	O
and	O
reported	O
mixed	O
results	O
with	O
both	O
.	O
</s>
<s>
Although	O
the	O
magazine	O
used	O
copies	O
of	O
the	O
genuine	O
64	O
ROMs	O
,	O
it	O
found	O
that	O
some	O
software	O
such	O
as	O
SpeedScript	B-Device
did	O
not	O
run	O
,	O
and	O
both	O
emulators	B-Application
 '	O
performance	O
was	O
inferior	O
to	O
the	O
real	O
computer	O
.	O
</s>
<s>
Others	O
included	O
MagiC64	O
and	O
A64	B-Device
.	O
</s>
<s>
There	O
is	O
an	O
Amiga	B-Device
version	O
of	O
VICE	O
,	O
which	O
emulates	B-Application
8-bit	O
commodore	O
computers	O
.	O
</s>
<s>
One	O
Apple	B-Device
II	I-Device
emulator	B-Application
for	O
the	O
Amiga	B-Device
was	O
Kevin	O
Kralian	O
's	O
.	O
</s>
<s>
Given	O
that	O
the	O
Amiga	B-Device
's	O
base	O
8MHz	O
68000	B-Device
CPU	O
struggled	O
to	O
emulate	B-Application
the	O
1MHz	O
6502	B-General_Concept
,	O
Apple	O
2000	O
was	O
written	O
in	O
assembly	O
language	O
for	O
the	O
68020+	O
CPU	O
to	O
actually	O
be	O
able	O
to	O
emulate	B-Application
an	O
Apple	B-Device
II	I-Device
at	O
full	O
speed	O
.	O
</s>
<s>
At	O
the	O
time	O
it	O
was	O
released	O
,	O
people	O
on	O
the	O
internet	O
speculated	O
it	O
was	O
part	O
of	O
the	O
Emplant	O
emulation	B-Application
solution	O
,	O
but	O
in	O
fact	O
Apple	O
2000	O
was	O
an	O
independent	O
project	O
.	O
</s>
<s>
A	O
particularly	O
interesting	O
feature	O
of	O
the	O
software	O
was	O
that	O
it	O
could	O
run	O
Apple	B-Device
II	I-Device
binaries	O
extracted	O
as	O
independent	O
program	O
files	O
,	O
but	O
also	O
disk	B-Device
images	O
which	O
had	O
been	O
compressed	O
with	O
Dalton	O
's	O
Disk	B-Device
Disintegrator	O
,	O
a	O
popular	O
disk	B-Device
compression	O
tool	O
from	O
the	O
1980s	O
.	O
</s>
<s>
Atari	B-Device
ST	I-Device
emulation	B-Application
on	O
Amiga	B-Device
is	O
very	O
easy	O
because	O
the	O
two	O
machines	O
share	O
the	O
same	O
model	O
of	O
processor	O
(	O
68000	B-Device
)	O
and	O
more	O
or	O
less	O
feature	O
the	O
same	O
hardware	O
characteristics	O
.	O
</s>
<s>
In	O
the	O
past	O
there	O
were	O
produced	O
various	O
software	O
based	O
Atari	O
emulators	B-Application
for	O
the	O
Amiga	B-Device
such	O
as	O
Amtari	O
,	O
or	O
Medusa	O
emulator	B-Application
.	O
</s>
<s>
AmigaOS	B-Application
4	I-Application
and	O
MorphOS	B-Operating_System
can	O
emulate	B-Application
Atari	B-Device
ST	I-Device
and	O
Atari	O
STE	O
platforms	O
by	O
using	O
Hatari	B-Application
free	O
software	B-Application
emulator	I-Application
which	O
was	O
released	O
under	O
GPL	O
.	O
</s>
<s>
PowerPC-equipped	O
computers	O
running	O
AmigaOS	B-Application
4	I-Application
can	O
run	O
UAE	B-Device
to	O
emulate	B-Application
a	O
Motorola	O
68000-equipped	O
Amiga	B-Device
.	O
</s>
