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A
X
4
B
P
r
o
-
5
3
3
A
X
4
B
P
r
o
-
5
3
3
E
E
P
R
O
M
(
E
l
e
c
t
r
o
n
E
E
P
R
O
M
(
E
l
e
c
t
r
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n
2
Also known as E
PROM. Both EEPROM and
technology is different. Size of EEPROM is much smaller than flash ROM.
E
E
P
P
R
R
O
O
M
M
(
(
E
E
r
r
a
a
s
s
a
a
b
b
l
l
e
e
Traditional motherboard stores BIOS code in EPROM. EPROM can only be erased by ultra-violet (UV) light. If BIOS has to be
upgraded, you need to remove EPROM from motherboard, clear by UV light, re-program, and then insert back.
E
E
V
V
6
6
B
B
u
u
s
s
EV6 Bus in the technology of Alpha processor from Digital Equipment Corporation. EV6 bus uses both rising and falling clock
edge to transfer data, similar as DDR SDRAM or ATA/66 IDE bus.
EV6 Bus Speed = CPU external bus clock x 2.
For example, 200 MHz EV6 bus is actually using 100 MHz external bus clock, but the equivalent speed is 200 MHz.
F
C
C
D
o
C
(
D
e
c
l
a
r
a
F
C
C
D
o
C
(
D
e
c
l
a
r
a
The DoC is component certification standard of FCC EMI regulations. This standard allows DIY component (such as
motherboard) to apply DoC label separately without a shielding of housing.
i
c
E
r
a
s
a
b
l
e
P
r
o
g
r
i
c
E
r
a
s
a
b
l
e
P
r
o
g
r
Flash ROM
P
P
r
r
o
o
g
g
r
r
a
a
m
m
m
m
a
a
b
b
l
l
e
e
R
R
O
O
t
i
o
n
o
f
C
o
n
f
o
r
m
i
t
y
t
i
o
n
o
f
C
o
n
f
o
r
m
i
t
y
a
m
m
a
b
l
e
R
O
M
)
a
m
m
a
b
l
e
R
O
M
)
can be re-programmed by electronic signals, but the interface
M
M
)
)
)
)
99
O
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l
i
n
e
M
a
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u
a
l
O
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M
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a
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