<s>
The	O
DDP-24	B-Device
(	O
1963	O
)	O
was	O
a	O
24-bit	O
computer	O
designed	O
and	O
built	O
by	O
the	O
Computer	O
Control	O
Company	O
,	O
aka	O
3C	O
,	O
located	O
in	O
Framingham	O
,	O
Massachusetts	O
.	O
</s>
<s>
The	O
DDP-24	B-Device
was	O
completely	O
transistorized	O
and	O
used	O
magnetic-core	O
memory	O
to	O
store	O
data	O
and	O
program	O
instructions	O
.	O
</s>
<s>
It	O
had	O
a	O
sign	B-Algorithm
magnitude	I-Algorithm
code	I-Algorithm
to	O
represent	O
positive	O
or	O
negative	O
numbers	O
and	O
used	O
binary	O
logic	O
.	O
</s>
<s>
The	O
DDP-24	B-Device
used	O
a	O
single	B-Language
address	I-Language
command	O
format	O
and	O
single	O
operation	O
with	O
index	O
and	O
indirect	B-Language
addressing	I-Language
flags	O
.	O
</s>
<s>
The	O
DDP-24	B-Device
found	O
use	O
in	O
space	O
and	O
flight	O
simulators	O
of	O
the	O
mid-1960s	O
and	O
other	O
real-time	O
scientific	O
data	O
processing	O
applications	O
.	O
</s>
<s>
It	O
and	O
a	O
DDP-24	B-Device
were	O
used	O
by	O
Max	O
Mathews	O
,	O
considered	O
by	O
many	O
to	O
be	O
the	O
founding	O
father	O
of	O
computer	O
music	O
,	O
to	O
develop	O
his	O
GROOVE	O
music	O
system	O
,	O
as	O
related	O
by	O
Professor	O
Barry	O
Vercoe	O
in	O
a	O
1999	O
MIT	O
Media	O
Lab	O
interview	O
.	O
</s>
<s>
The	O
first	O
studio	O
we	O
had	O
was	O
in	O
the	O
basement	O
of	O
Building	O
26	O
,	O
where	O
we	O
had	O
a	O
computer	O
given	O
to	O
MIT	O
by	O
Max	O
Mathews--the	O
Honeywell	O
DDP-24	B-Device
.	O
</s>
<s>
The	O
3C	O
DDP-24	B-Device
used	O
modules	O
or	O
cards	O
called	O
S-Pac	O
'	O
s	O
.	O
</s>
<s>
These	O
S-Pac	O
cards	O
could	O
be	O
Flip-Flops	B-General_Concept
,	O
NAND	O
gates	O
,	O
Bit	B-General_Concept
Registers	I-General_Concept
etc	O
.	O
</s>
<s>
and	O
were	O
housed	O
in	O
a	O
DDP-24	B-Device
S-Bloc	O
card	O
rack	O
.	O
</s>
<s>
An	O
early	O
raster-scan	B-Algorithm
graphics	I-Algorithm
display	O
was	O
developed	O
for	O
the	O
computer	O
system	O
.	O
</s>
