<s>
Scoreboarding	B-General_Concept
is	O
a	O
centralized	O
method	O
,	O
first	O
used	O
in	O
the	O
CDC	B-Device
6600	I-Device
computer	O
,	O
for	O
dynamically	O
scheduling	O
instructions	O
so	O
that	O
they	O
can	O
execute	O
out	O
of	O
order	O
when	O
there	O
are	O
no	O
conflicts	O
and	O
the	O
hardware	O
is	O
available	O
.	O
</s>
<s>
In	O
a	O
scoreboard	O
,	O
the	O
data	B-Operating_System
dependencies	I-Operating_System
of	O
every	O
instruction	O
are	O
logged	O
,	O
tracked	O
and	O
strictly	O
observed	O
at	O
all	O
times	O
.	O
</s>
<s>
Scoreboarding	B-General_Concept
is	O
essentially	O
a	O
hardware	O
implementation	O
of	O
the	O
same	O
underlying	O
algorithm	O
seen	O
in	O
dataflow	B-Application
languages	I-Application
,	O
creating	O
a	O
Directed	O
Acyclic	O
Graph	O
,	O
where	O
the	O
same	O
logic	O
is	O
applied	O
in	O
the	O
programming	O
language	O
runtime	O
.	O
</s>
<s>
Some	O
other	O
techniques	O
like	O
Tomasulo	B-General_Concept
algorithm	I-General_Concept
additionally	O
resolve	O
WAW	O
dependencies	O
with	O
register	B-Architecture
renaming	I-Architecture
.	O
</s>
<s>
The	O
original	O
CDC	B-Device
6600	I-Device
likely	O
did	O
not	O
have	O
WAW	O
hazard	O
tracking	O
simply	O
because	O
its	O
designers	O
had	O
to	O
deliver	O
product	O
,	O
and	O
then	O
moved	O
on	O
to	O
the	O
7600	O
:	O
stalling	O
instead	O
was	O
the	O
most	O
expedient	O
option	O
.	O
</s>
<s>
There	O
is	O
no	O
technical	O
reason	O
why	O
Register	B-Architecture
renaming	I-Architecture
should	O
not	O
be	O
added	O
to	O
Scoreboards	O
.	O
</s>
<s>
An	O
analysis	O
of	O
both	O
algorithms	O
was	O
carried	O
out	O
by	O
Luke	O
Leighton	O
and	O
a	O
transformation	O
process	O
outlined	O
which	O
shows	O
equivalence	O
between	O
the	O
Tomasulo	B-General_Concept
algorithm	I-General_Concept
and	O
the	O
6600	O
Scoreboard	O
algorithm	O
.	O
</s>
