<s>
The	O
MicroVAX	B-Device
78032	I-Device
(	O
otherwise	O
known	O
as	O
the	O
DC333	O
)	O
is	O
a	O
microprocessor	B-Architecture
developed	O
and	O
fabricated	O
by	O
Digital	O
Equipment	O
Corporation	O
(	O
DEC	O
)	O
that	O
implements	O
a	O
subset	O
of	O
the	O
VAX	B-Device
instruction	B-General_Concept
set	I-General_Concept
architecture	I-General_Concept
(	O
ISA	O
)	O
.	O
</s>
<s>
The	O
78032	O
is	O
used	O
exclusively	O
in	O
DEC	O
's	O
VAX-based	O
systems	O
,	O
starting	O
with	O
the	O
MicroVAX	B-Device
II	I-Device
in	O
1985	O
.	O
</s>
<s>
When	O
clocked	O
at	O
a	O
frequency	O
of	O
5MHz	O
,	O
the	O
78032	O
's	O
integer	O
performance	O
is	O
comparable	O
to	O
the	O
original	O
VAX-11/780	O
of	O
1977	O
.	O
</s>
<s>
The	O
microprocessor	B-Architecture
can	O
be	O
paired	O
with	O
the	O
MicroVAX	B-Device
78132	O
floating	B-Algorithm
point	I-Algorithm
accelerator	O
for	O
improved	O
floating	B-Algorithm
point	I-Algorithm
performance	O
.	O
</s>
<s>
It	O
is	O
DEC	O
's	O
first	O
single-chip	O
microprocessor	B-Architecture
implementation	O
of	O
the	O
VAX	B-Device
ISA	O
and	O
DEC	O
's	O
first	O
self-fabricated	O
microprocessor	B-Architecture
.	O
</s>
<s>
The	O
MicroVAX	B-Device
78032	I-Device
is	O
also	O
the	O
first	O
semiconductor	O
device	O
to	O
be	O
registered	O
for	O
protection	O
under	O
the	O
Semiconductor	O
Chip	O
Protection	O
Act	O
of	O
1984	O
.	O
</s>
<s>
The	O
MicroVAX	B-Device
78032	I-Device
contains	O
125,000	O
transistors	O
on	O
an	O
8.7	O
by	O
8.6mm	O
(	O
74.82mm2	O
)	O
die	O
that	O
was	O
fabricated	O
in	O
DEC	O
's	O
ZMOS	B-Device
process	O
,	O
a	O
3.0µm	O
NMOS	B-Algorithm
logic	I-Algorithm
process	O
with	O
two	O
layers	O
of	O
aluminum	O
interconnect	O
.	O
</s>
<s>
The	O
die	O
is	O
packaged	O
in	O
a	O
68-pin	O
surface-mounted	O
leaded	B-Algorithm
chip	I-Algorithm
carrier	I-Algorithm
.	O
</s>
<s>
The	O
MicroVAX	B-Device
78132	O
(	O
otherwise	O
known	O
as	O
the	O
DC337	O
)	O
is	O
a	O
floating-point	B-Algorithm
coprocessor	B-General_Concept
for	O
the	O
MicroVAX	B-Device
78032	I-Device
microprocessor	B-Architecture
.	O
</s>
<s>
It	O
interfaces	O
to	O
the	O
MicroVAX	B-Device
78032	I-Device
via	O
the	O
DAL	O
bus	O
and	O
a	O
few	O
control	O
lines	O
.	O
</s>
<s>
The	O
MicroVAX	B-Device
78132	O
is	O
responsible	O
for	O
executing	O
61	O
out	O
of	O
70	O
floating-point	B-Algorithm
instructions	O
defined	O
by	O
the	O
MicroVAX	B-Device
subset	O
of	O
the	O
VAX	B-Device
ISA	O
and	O
accelerates	O
nine	O
integer	O
instructions	O
.	O
</s>
<s>
The	O
MicroVAX	B-Device
78132	O
has	O
a	O
100	O
ns	O
microcycle	O
divided	O
into	O
four	O
25	O
ns	O
clock	O
phases	O
which	O
is	O
generated	O
by	O
a	O
40MHz	O
input	O
clock	O
.	O
</s>
<s>
The	O
MicroVAX	B-Device
78132	O
contains	O
32,141	O
transistors	O
on	O
a	O
die	O
measuring	O
8.4mm	O
by	O
6.6mm	O
(	O
55.44mm2	O
)	O
.	O
</s>
<s>
It	O
was	O
fabricated	O
in	O
DEC	O
's	O
ZMOS	B-Device
process	O
,	O
a	O
3.0µm	O
NMOS	O
process	O
with	O
two	O
layers	O
of	O
aluminum	O
interconnect	O
;	O
and	O
is	O
packaged	O
in	O
a	O
68-pin	O
surface-mounted	O
leaded	B-Algorithm
chip	I-Algorithm
carrier	I-Algorithm
.	O
</s>
<s>
An	O
identical	O
copy	O
of	O
the	O
78032	O
was	O
manufactured	O
1989/90	O
in	O
East	O
Germany	O
as	O
the	O
U80701	B-Device
.	O
</s>
