95
A
A
X
X
4
4
P
P
E
E
R
R
/
/
A
A
X
X
4
4
P
P
E
E
R
R
-
-
N
N
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
A
A
T
T
A
A
/
/
1
1
0
0
0
0
ATA/100 is a new IDE specification under developing. ATA/100 uses both rising edge and falling edge as
but clock cycle
time is reduced to 40ns. The data transfer rate is (1/40ns) x 2 bytes x 2 = 100MB/s. To use ATA/100, you need special 80-wire
IDE cable, the same as ATA/66.
A
A
T
T
A
A
/
/
1
1
3
3
3
3
ATA/133 is a new IDE specification under developing. ATA/133 uses both rising edge and falling edge as
but clock cycle
time is reduced to 30ns. The data transfer rate is (1/30ns) x 2 bytes x 2 = 133MB/s. To use ATA/133, you need special 80-wire
IDE cable, the same as ATA/66.
B
B
I
I
O
O
S
S
(
(
B
B
a
a
s
s
i
i
c
c
I
I
n
n
p
p
u
u
t
t
/
/
O
O
u
u
t
t
p
p
u
u
t
t
S
S
y
y
s
s
t
t
e
e
m
m
)
)
BIOS is a set of assembly routine/program that reside in
. BIOS controls Input/output devices and other
hardware devices of motherboard. In general, to provide hardware independent portability, operation system and drivers is
required to access BIOS without directly access hardware devices.
