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M
X
4
6
-
8
0
0
N
/
M
M
X
4
6
-
8
0
0
N
/
M
can only detect single-bit error.
E
E
P
R
O
M
(
E
l
e
c
t
r
o
n
i
c
E
r
a
s
a
E
E
P
R
O
M
(
E
l
e
c
t
r
o
n
i
c
E
r
a
s
a
2
Also known as E
PROM. Both EEPROM and
is different. Size of EEPROM is much smaller than flash ROM.
E
P
R
O
M
(
E
r
a
s
a
b
l
e
P
r
o
g
r
a
m
E
P
R
O
M
(
E
r
a
s
a
b
l
e
P
r
o
g
r
a
m
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
V
6
B
u
s
E
V
6
B
u
s
EV6 Bus is the technology of Alpha processor from Digital Equipment Corporation. EV6 bus uses both rising and falling clock edge
to transfer data, similar as DDR RAM or ATA/66 IDE bus.
EV6 Bus Speed = CPU external bus clock x 2.
200 MHz EV6 bus, 200MHz = 100 MHz external bus clock x 2
F
C
C
D
o
C
(
D
e
c
l
a
r
a
t
i
o
n
o
f
C
F
C
C
D
o
C
(
D
e
c
l
a
r
a
t
i
o
n
o
f
C
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.
X
4
6
-
8
0
0
L
X
4
6
-
8
0
0
L
b
l
e
P
r
o
g
r
a
m
m
a
b
l
e
R
O
M
)
b
l
e
P
r
o
g
r
a
m
m
a
b
l
e
R
O
M
)
Flash ROM
m
a
b
l
e
R
O
M
)
m
a
b
l
e
R
O
M
)
o
n
f
o
r
m
i
t
y
)
o
n
f
o
r
m
i
t
y
)
can be re-programmed by electronic signals, but the interface technology
91
O
n
l
i
n
e
M
a
n
u
a
l
O
n
l
i
n
e
M
a
n
u
a
l
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