<s>
VAX	B-Language
MACRO	I-Language
is	O
the	O
computer	O
assembly	B-Language
language	I-Language
implementing	O
the	O
VAX	B-Device
instruction	B-General_Concept
set	I-General_Concept
architecture	I-General_Concept
for	O
the	O
OpenVMS	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
,	O
originally	O
released	O
by	O
Digital	O
Equipment	O
Corporation	O
(	O
DEC	O
)	O
in	O
1977	O
.	O
</s>
<s>
The	O
syntax	O
,	O
directives	O
,	O
macro	O
language	O
,	O
and	O
lexical	B-Language
substitution	O
operators	O
of	O
VAX	B-Language
MACRO	I-Language
formerly	O
appeared	O
in	O
MACRO-11	B-Device
,	O
the	O
assembler	B-Language
for	O
the	O
PDP-11	B-Device
series	O
of	O
computers	O
.	O
</s>
<s>
The	O
MACRO-32	B-Language
assembler	B-Language
supported	O
the	O
VAX	B-Device
processors	O
developed	O
and	O
manufactured	O
by	O
DEC	O
.	O
</s>
<s>
It	O
ran	O
under	O
the	O
VMS	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
and	O
produced	O
object	O
files	O
suitable	O
for	O
the	O
VMS	B-Operating_System
linker	B-Application
.	O
</s>
<s>
The	O
MACRO-32	B-Language
assembler	B-Language
and	O
linker	B-Application
were	O
bundled	O
with	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
To	O
port	O
VMS	B-Operating_System
to	O
the	O
DEC	B-Device
Alpha	I-Device
,	O
VAX	B-Language
MACRO	I-Language
was	O
implemented	O
for	O
the	O
Alpha	B-Device
architecture	O
.	O
</s>
<s>
Since	O
the	O
Alpha	B-Device
used	O
a	O
different	O
instruction	B-General_Concept
set	I-General_Concept
than	O
the	O
VAX	B-Device
,	O
MACRO-32	B-Language
was	O
implemented	O
as	O
a	O
compiler	B-Language
,	O
compiling	B-Language
VAX	B-Device
assembly	B-Language
language	I-Language
into	O
Alpha	B-Device
instructions	O
.	O
</s>
<s>
The	O
Alpha	B-Device
AXP	I-Device
chips	O
have	O
their	O
own	O
native	O
instruction	B-General_Concept
set	I-General_Concept
architecture	I-General_Concept
,	O
the	O
OpenVMS	B-Operating_System
assembler	B-Language
for	O
Alpha	B-Device
assembly	B-Language
code	I-Language
is	O
named	O
MACRO-64	O
.	O
</s>
<s>
A	O
compiler	B-Language
from	O
MACRO-32	B-Language
is	O
available	O
for	O
Intel	B-General_Concept
Itanium	I-General_Concept
architecture	O
,	O
and	O
for	O
x86-64	B-Device
.	O
</s>
