<s>
Versatile	B-Operating_System
Real-Time	I-Operating_System
Executive	I-Operating_System
(	O
VRTX	O
)	O
is	O
a	O
real-time	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
(	O
RTOS	B-Operating_System
)	O
developed	O
and	O
marketed	O
by	O
the	O
company	O
Mentor	O
Graphics	O
.	O
</s>
<s>
VRTX	O
is	O
suitable	O
for	O
both	O
traditional	O
board-based	O
embedded	B-Architecture
systems	I-Architecture
and	O
system	B-Architecture
on	I-Architecture
a	I-Architecture
chip	I-Architecture
(	O
SoC	B-Architecture
)	O
architectures	O
.	O
</s>
<s>
It	O
has	O
been	O
superseded	O
by	O
the	O
Nucleus	B-Operating_System
RTOS	I-Operating_System
.	O
</s>
<s>
The	O
VRTX	O
operating	B-General_Concept
system	I-General_Concept
began	O
as	O
a	O
product	O
of	O
Hunter	O
&	O
Ready	O
,	O
a	O
company	O
founded	O
by	O
James	B-Operating_System
Ready	I-Operating_System
and	O
Colin	O
Hunter	O
in	O
1980	O
which	O
later	O
became	O
Ready	B-Operating_System
Systems	I-Operating_System
.	O
</s>
<s>
The	O
VRTX	O
operating	B-General_Concept
system	I-General_Concept
was	O
released	O
in	O
september	O
1981	O
.	O
</s>
<s>
Since	O
the	O
1980s	O
,	O
the	O
chief	O
rival	O
to	O
VRTX	O
has	O
been	O
VxWorks	B-Operating_System
,	O
a	O
Wind	O
River	O
Systems	O
product	O
.	O
</s>
<s>
VxWorks	B-Operating_System
had	O
its	O
start	O
in	O
the	O
mid	O
1980s	O
as	O
compiler	B-Language
and	O
assembly	B-Language
language	I-Language
tools	O
to	O
supplement	O
VRTX	O
,	O
named	O
VRTX	O
works	O
,	O
or	O
VxWorks	B-Operating_System
.	O
</s>
<s>
Later	O
,	O
Wind	O
River	O
created	O
their	O
own	O
real-time	B-Operating_System
kernel	B-Operating_System
offering	O
similar	O
to	O
VRTX	O
.	O
</s>
<s>
VRTX	O
:	O
16-bit	B-Device
VRTX	O
,	O
for	O
Z8000	B-Device
,	O
8086	B-General_Concept
,	O
etc	O
.	O
</s>
<s>
VRTX-32	O
:	O
32-bit	O
VRTX	O
,	O
for	O
M68K	B-Device
,	O
AMD29K	B-General_Concept
,	O
etc	O
.	O
</s>
<s>
VRTX-oc	O
:	O
On-chip	O
VRTX	O
,	O
freeware	B-License
community	O
source	O
code	O
for	O
personal	O
and	O
academic	O
use	O
,	O
license	O
required	O
for	O
commercial	O
use	O
.	O
</s>
<s>
VRTX-sa	O
:	O
Scalable	O
Architecture	O
VRTX	O
for	O
full	O
operating	B-General_Concept
system	I-General_Concept
features	O
.	O
</s>
<s>
Loosely	O
based	O
on	O
Carnegie	O
Mellon	O
University	O
's	O
Mach	B-Operating_System
microkernel	I-Operating_System
principles	O
.	O
</s>
<s>
SPECTRA	O
:	O
Virtual	B-Architecture
machine	I-Architecture
(	O
VM	O
)	O
implementation	O
for	O
running	O
a	O
VRTX	O
VM	O
on	O
Unix-like	B-Operating_System
hosts	O
.	O
</s>
<s>
Also	O
includes	O
an	O
open	O
integrated	B-Application
development	I-Application
environment	I-Application
allowing	O
third-party	O
tools	O
open	O
access	O
to	O
cross-development	O
resources	O
.	O
</s>
<s>
Most	O
companies	O
developing	O
software	O
with	O
VRTX	O
use	O
reduced	B-Architecture
instruction	I-Architecture
set	I-Architecture
computer	I-Architecture
(	O
RISC	B-Architecture
)	O
microprocessors	B-Architecture
including	O
ARM	B-Architecture
,	O
MIPS	B-Device
,	O
PowerPC	B-Architecture
,	O
or	O
others	O
.	O
</s>
<s>
VRTX	O
was	O
the	O
first	O
operating	B-General_Concept
system	I-General_Concept
ported	O
to	O
the	O
AMD	B-General_Concept
Am29000	I-General_Concept
.	O
</s>
<s>
VRTX	O
is	O
used	O
as	O
a	O
core	O
for	O
the	O
Motorola	O
proprietary	B-Application
P2K	O
(	O
page	O
in	O
Russian	O
language	O
)	O
operating	B-General_Concept
system	I-General_Concept
,	O
which	O
runs	O
on	O
most	O
company	O
devices	O
since	O
the	O
Motorola	O
V60	O
and	O
T280i	O
,	O
up	O
to	O
the	O
Motorola	O
RAZR2	O
V9x	O
.	O
</s>
<s>
It	O
runs	O
on	O
several	O
hardware	O
platforms	O
including	O
LTE	O
(	O
Motorola	O
V300	O
,	O
V500	O
,	O
V600	O
,	O
E398	O
,	O
RAZR	O
V3	O
and	O
others	O
featuring	O
the	O
ARM7	O
processor	O
)	O
,	O
LTE2	O
(	O
Motorola	O
L7	O
and	O
upcoming	O
devices	O
with	O
176x220	O
screen	O
resolution	O
)	O
,	O
Rainbow	O
POG	O
(	O
3G	B-Architecture
phones	I-Architecture
featuring	O
an	O
MCORE	B-Device
processor	O
from	O
Motorola	O
E1000	O
to	O
RAZR	O
V3x	O
)	O
,	O
Argon	O
(	O
all	O
new	O
3G	B-Architecture
phones	I-Architecture
with	O
532MHz	O
ARM11	O
processor	O
since	O
Motorola	O
RAZR	O
MAXX	O
V6	O
,	O
and	O
V3xx	O
)	O
,	O
and	O
others	O
.	O
</s>
