109
A
A
X
X
4
4
G
G
P
P
r
r
o
o
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
F
F
l
l
a
a
s
s
h
h
R
R
O
O
M
M
Flash ROM can be re-programmed by electronic signals. It is easier for BIOS to upgrade by a flash utility, but it is also easier to
e infected by virus. Because of increase of new functions, BIOS size is increased from 64KB to 256KB (2M bit). AOpen AX5T
w flash ROM size is moving to 4M bit on AX6C (Intel 820) and
EEPROM for jumper-less and battery-less design.
ans CPU external bus clock.
b
is the first board to implement 256KB (2Mbit) Flash ROM. No
MX3W (Intel 810) motherboard. , AOpen motherboard uses
F
F
S
S
B
B
(
(
F
F
r
r
o
o
n
n
t
t
S
S
i
i
d
d
e
e
B
B
u
u
s
s
)
)
C
C
l
l
o
o
c
c
k
k
FSB Clock me
CPU internal clock = CPU FSB Clock x CPU Clock Ratio
I
I
2
2
C
C
B
B
u
u
s
s
See
SMBus
.