<s>
The	O
7360/8360	O
Text	O
Editing	O
Device	O
(	O
TED	O
)	O
was	O
an	O
integrated	O
circuit	O
made	O
by	O
MOS	B-Architecture
Technology	I-Architecture
,	I-Architecture
Inc	I-Architecture
.	I-Architecture
</s>
<s>
It	O
was	O
a	O
video	B-General_Concept
chip	I-General_Concept
that	O
also	O
contained	O
sound	O
generation	O
hardware	O
,	O
DRAM	O
refresh	O
circuitry	O
,	O
interval	B-Device
timers	I-Device
,	O
and	O
keyboard	B-Device
input	O
handling	O
.	O
</s>
<s>
It	O
was	O
designed	O
for	O
the	O
Commodore	B-Operating_System
Plus/4	I-Operating_System
and	O
16	B-Operating_System
.	O
</s>
<s>
Packaging	O
consisted	O
of	O
a	O
JEDEC-standard	O
48-pin	O
DIP	B-Algorithm
.	O
</s>
<s>
In	O
contrast	O
,	O
the	O
TED	O
caches	O
the	O
color	O
attributes	O
on-chip	O
,	O
increasing	O
the	O
SRAM	O
from	O
and	O
does	O
away	O
with	O
the	O
external	O
color	O
RAM	B-Architecture
.	O
</s>
<s>
It	O
generated	O
16	B-Operating_System
base	O
colors	O
by	O
variations	O
of	O
Pb	O
and	O
Pr	O
chroma	O
signals	O
(	O
with	O
8	O
possible	O
steps	O
,	O
ranging	O
from	O
0	O
,	O
+	O
-0.3826834	O
,	O
+	O
-0.7071068	O
to	O
+	O
-1.0	O
)	O
.	O
</s>
<s>
Fifteen	O
of	O
these	O
16	B-Operating_System
colors	O
(	O
black	O
being	O
the	O
exception	O
)	O
could	O
be	O
assigned	O
one	O
of	O
8	O
Y	O
luma	O
values	O
(	O
0.125	O
,	O
0.25	O
,	O
0.375	O
,	O
0.5	O
,	O
0.625	O
,	O
0.75	O
,	O
0.875	O
,	O
1.0	O
)	O
,	O
thus	O
making	O
the	O
TED	O
capable	O
of	O
displaying	O
a	O
far	O
wider	O
array	O
of	O
colors	O
than	O
the	O
VIC-II	O
.	O
</s>
<s>
The	O
TED	O
includes	O
three	O
16-bit	B-Device
interval	B-Device
timers	I-Device
,	O
which	O
consist	O
of	O
down	O
counters	O
operating	O
at	O
the	O
master	O
clock	O
frequency	O
.	O
</s>
<s>
They	O
can	O
generate	O
IRQs	B-General_Concept
on	O
underflow	O
as	O
can	O
a	O
raster	B-General_Concept
register	I-General_Concept
on	O
equality	O
with	O
the	O
current	O
scan	O
line	O
.	O
</s>
<s>
The	O
chip	O
also	O
contains	O
an	O
I/O	B-Architecture
port	I-Architecture
,	O
which	O
is	O
used	O
on	O
the	O
Plus/4	B-Operating_System
and	O
16	B-Operating_System
to	O
scan	O
the	O
keyboard	B-Device
and	O
joystick	B-Device
.	O
</s>
<s>
In	O
addition	O
,	O
it	O
handles	O
bank	B-General_Concept
switching	I-General_Concept
,	O
used	O
by	O
the	O
operating	O
system	O
to	O
maximize	O
the	O
amount	O
of	O
RAM	B-Architecture
available	O
to	O
Commodore	B-Language
BASIC	I-Language
.	O
</s>
