<s>
Simics	B-Application
is	O
a	O
full-system	B-Application
simulator	I-Application
or	O
virtual	B-Architecture
platform	I-Architecture
used	O
to	O
run	O
unchanged	O
production	O
binaries	O
of	O
the	O
target	O
hardware	O
.	O
</s>
<s>
Simics	B-Application
was	O
originally	O
developed	O
by	O
the	O
Swedish	O
Institute	O
of	O
Computer	O
Science	O
(	O
SICS	O
)	O
,	O
and	O
then	O
spun	O
off	O
to	O
Virtutech	O
for	O
commercial	O
development	O
in	O
1998	O
.	O
</s>
<s>
Currently	O
,	O
Simics	B-Application
is	O
provided	O
by	O
Intel	O
in	O
a	O
public	O
release	O
and	O
sold	O
commercially	O
by	O
Wind	O
River	O
Systems	O
,	O
which	O
was	O
in	O
the	O
past	O
a	O
subsidiary	O
of	O
Intel	O
.	O
</s>
<s>
Simics	B-Application
contains	O
both	O
instruction	B-Application
set	I-Application
simulators	I-Application
and	O
hardware	O
models	O
,	O
and	O
is	O
or	O
has	O
been	O
used	O
to	O
simulate	O
systems	O
such	O
as	O
Alpha	B-Device
,	O
IA-64	B-General_Concept
,	O
ARM	B-Architecture
(	O
32	O
-	O
and	O
64-bit	B-Device
)	O
,	O
MIPS	B-Device
(	O
32	O
-	O
and	O
64-bit	B-Device
)	O
,	O
MSP430	B-Architecture
,	O
PowerPC	B-Architecture
(	O
32	O
-	O
and	O
64-bit	B-Device
)	O
,	O
SPARC-V8	B-Architecture
and	I-Architecture
V9	I-Architecture
,	O
and	O
x86	B-Operating_System
and	O
x86-64	B-Device
CPUs	O
.	O
</s>
<s>
Many	O
operating	O
systems	O
have	O
been	O
run	O
on	O
various	O
varieties	O
of	O
the	O
simulated	O
hardware	O
,	O
including	O
MS-DOS	B-Application
,	O
Windows	B-Application
,	O
VxWorks	B-Operating_System
,	O
OSE	O
,	O
Solaris	B-Application
,	O
FreeBSD	B-Operating_System
,	O
Linux	B-Application
,	O
QNX	B-Operating_System
,	O
RTEMS	B-Operating_System
,	O
and	O
UEFI	B-Architecture
.	O
</s>
<s>
The	O
NetBSD	B-Device
AMD64	B-Device
port	O
was	O
initially	O
developed	O
using	O
Simics	B-Application
before	O
the	O
public	O
release	O
of	O
the	O
chip	O
.	O
</s>
<s>
The	O
purpose	O
of	O
simulation	O
in	O
Simics	B-Application
is	O
often	O
to	O
develop	O
software	O
for	O
a	O
particular	O
type	O
of	O
hardware	O
without	O
requiring	O
access	O
to	O
that	O
precise	O
hardware	O
,	O
using	O
Simics	B-Application
as	O
a	O
virtual	B-Architecture
platform	I-Architecture
.	O
</s>
<s>
Intel	O
uses	O
Simics	B-Application
to	O
provide	O
its	O
ecosystem	O
with	O
access	O
to	O
future	O
platform	O
months	O
or	O
years	O
ahead	O
of	O
the	O
hardware	O
launch	O
.	O
</s>
<s>
The	O
current	O
version	O
of	O
Simics	B-Application
is	O
6	O
which	O
was	O
released	O
publicly	O
in	O
2019	O
.	O
</s>
<s>
Simics	B-Application
runs	O
on	O
64-bit	B-Device
Intel	O
Architecture	O
machines	O
running	O
Microsoft	B-Application
Windows	I-Application
and	O
Linux	B-Application
(	O
32-bit	O
support	O
was	O
dropped	O
with	O
the	O
release	O
of	O
Simics	B-Application
5	O
,	O
since	O
64-bit	B-Device
provides	O
significant	O
performance	O
advantages	O
and	O
is	O
universally	O
available	O
on	O
current	O
hardware	O
)	O
.	O
</s>
<s>
The	O
previous	O
version	O
,	O
Simics	B-Application
5	O
,	O
was	O
released	O
in	O
2015	O
.	O
</s>
<s>
Simics	B-Application
has	O
the	O
ability	O
to	O
execute	O
a	O
system	O
in	O
forward	O
and	O
reverse	O
direction	O
.	O
</s>
<s>
Reverse	B-Application
debugging	I-Application
can	O
illuminate	O
how	O
an	O
exceptional	O
condition	O
or	O
bug	B-Error_Name
occurred	O
.	O
</s>
<s>
When	O
executing	O
an	O
OS	O
such	O
as	O
Linux	B-Application
in	O
reverse	O
using	O
Simics	B-Application
,	O
previously	O
deleted	O
files	O
reappear	O
when	O
the	O
deletion	O
point	O
is	O
passed	O
in	O
reverse	O
and	O
scrolling	O
and	O
other	O
graphical	O
display	O
and	O
console	O
updates	O
occur	O
backwards	O
as	O
well	O
.	O
</s>
<s>
Simics	B-Application
is	O
built	O
for	O
high	O
performance	O
execution	O
of	O
full-system	O
models	O
,	O
and	O
uses	O
both	O
binary	O
translation	O
and	O
hardware-assisted	B-General_Concept
virtualization	I-General_Concept
to	O
increase	O
simulation	O
speed	O
.	O
</s>
