<s>
The	O
CADC	O
was	O
a	O
multi-chip	O
integrated	O
flight	O
control	O
system	O
developed	O
by	O
Garrett	O
AiResearch	O
and	O
used	O
in	O
early	O
versions	O
of	O
the	O
US	O
Navy	O
's	O
F-14	B-Device
Tomcat	I-Device
fighter	O
.	O
</s>
<s>
It	O
is	O
notable	O
for	O
early	O
use	O
of	O
MOS	B-Architecture
custom	O
integrated	O
circuits	O
and	O
has	O
been	O
claimed	O
as	O
the	O
first	O
microprocessor	B-Architecture
.	O
</s>
<s>
The	O
first	O
microprocessor	B-Architecture
existing	O
on	O
a	O
single	O
chip	O
was	O
the	O
contemporary	O
Intel	B-General_Concept
4004	I-General_Concept
.	O
</s>
<s>
However	O
,	O
the	O
4004	B-General_Concept
did	O
not	O
have	O
nearly	O
the	O
computing	O
power	O
or	O
interfacing	O
capability	O
required	O
to	O
perform	O
the	O
functions	O
of	O
the	O
CADC	O
;	O
at	O
the	O
time	O
,	O
the	O
best	O
integrated	O
circuit	O
(	O
chip	O
)	O
technology	O
available	O
lacked	O
the	O
scale	O
(	O
number	O
of	O
transistors	O
per	O
chip	O
)	O
necessary	O
to	O
build	O
a	O
single-chip	O
microprocessor	B-Architecture
for	O
a	O
flight	O
control	O
system	O
.	O
</s>
<s>
The	O
CADC	O
consisted	O
of	O
an	O
A-to-D	O
converter	O
,	O
several	O
quartz	B-General_Concept
pressure	O
sensors	O
,	O
and	O
a	O
number	O
of	O
MOS-based	O
microchips	O
.	O
</s>
<s>
The	O
MP944	B-Device
ran	O
at	O
375	O
kHz	O
.	O
</s>
<s>
It	O
contained	O
six	O
chips	O
used	O
to	O
build	O
the	O
CADC	O
,	O
all	O
based	O
on	O
a	O
20-bit	O
fixed-point-fraction	O
two	B-General_Concept
's	I-General_Concept
complement	I-General_Concept
number	O
system	O
.	O
</s>
<s>
They	O
were	O
the	O
parallel	O
multiplier	O
unit	O
(	O
PMU	O
)	O
in	O
a	O
28-pin	O
DIP	B-Algorithm
,	O
the	O
parallel	O
divider	O
unit	O
(	O
PDU	O
)	O
(	O
28-pin	O
DIP	B-Algorithm
)	O
,	O
the	O
random-access	O
storage	O
(	O
RAS	O
)	O
(	O
14-pin	O
DIP	B-Algorithm
)	O
,	O
the	O
read-only	B-Device
memory	I-Device
(	O
ROM	B-Device
)	O
(	O
14-pin	O
DIP	B-Algorithm
)	O
,	O
the	O
special	O
logic	O
function	O
(	O
SLF	O
)	O
(	O
28-pin	O
DIP	B-Algorithm
)	O
,	O
and	O
the	O
steering	O
logic	O
unit	O
(	O
SLU	O
)	O
(	O
28-pin	O
DIP	B-Algorithm
)	O
.	O
</s>
