Table of Contents
Advertisement
F
o
r
t
r
e
s
s
7
7
0
0
/
7
F
o
r
t
r
e
s
s
7
7
0
0
/
7
E
C
C
(
E
r
r
o
r
C
h
e
c
k
E
C
C
(
E
r
r
o
r
C
h
e
c
The ECC mode needs 8 ECC bits for 64-bit data. Each time memory is accessed, ECC bits are updated and checked by a special
algorithm. The ECC algorithm has the ability to detect double-bit error and automatically correct single-bit error while parity mode can
only detect single-bit error.
E
D
O
(
E
x
t
e
n
d
e
d
D
E
D
O
(
E
x
t
e
n
d
e
d
D
The EDO DRAM technology is actually very similar to FPM (Fast Page Mode). Unlike traditional FPM that tri-states the memory output
data to start the pre-charge activity, EDO DRAM holds the memory data valid until the next memory access cycle, that is similar to
pipeline effect and reduces one clock state.
E
E
P
R
O
M
(
E
l
e
c
t
r
o
E
E
P
R
O
M
(
E
l
e
c
t
r
o
2
Also known as E
PROM. Both EEPROM and
different. Size of EEPROM is much smaller than flash ROM, AOpen motherboard uses EEPROM for jumper-less and battery-less
design.
E
P
R
O
M
(
E
r
a
s
a
b
l
e
E
P
R
O
M
(
E
r
a
s
a
b
l
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.
9
0
0
9
0
0
i
n
g
a
n
d
C
o
r
r
e
c
t
i
o
k
i
n
g
a
n
d
C
o
r
r
e
c
t
i
o
a
t
a
O
u
t
p
u
t
)
M
e
m
o
a
t
a
O
u
t
p
u
t
)
M
e
m
o
n
i
c
E
r
a
s
a
b
l
e
P
r
o
g
n
i
c
E
r
a
s
a
b
l
e
P
r
o
g
Flash ROM
P
r
o
g
r
a
m
m
a
b
l
e
R
e
P
r
o
g
r
a
m
m
a
b
l
e
R
n
)
n
)
r
y
r
y
r
a
m
m
a
b
l
e
R
O
M
)
r
a
m
m
a
b
l
e
R
O
M
)
can be re-programmed by electronic signals, but the interface technology is
O
M
)
O
M
)
149
O
n
l
i
n
e
M
a
O
n
l
i
n
e
M
a
A
Open
n
u
a
l
n
u
a
l
Advertisement
Table of Contents
