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M
X
4
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5
3
3
V
/
M
M
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5
3
3
V
/
M
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
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.
B
I
O
S
(
B
a
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i
c
I
n
p
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t
/
B
I
O
S
(
B
a
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i
c
I
n
p
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t
/
BIOS is a set of assembly routine/program that reside in
devices of motherboard. In general, to provide hardware independent portability, operation system and drivers is required to access BIOS
without directly access hardware devices.
B
u
s
M
a
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e
r
I
D
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(
D
B
u
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M
a
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D
The traditional PIO (Programmable I/O) IDE requires the CPU to involve in all the activities of the IDE access including waiting for the
mechanical events. To reduce the workload of the CPU, the bus master IDE device transfers data from/to memory without interrupting CPU,
and releases CPU to operate concurrently while data is transferring between memory and IDE device. You need the bus master IDE driver
and the bus master IDE HDD to support bus master IDE mode.
C
C
N
N
R
R
(
(
C
C
o
o
m
m
m
m
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The CNR specification provides the PC industry the opportunity to deliver a flexible and cost reduced method of implementing LAN, home
networking, DSL, USB, wireless, audio and modem subsystems widely used in today's "connected PCs". The CNR specification is an open
industry specification and is supported by OEMs, IHV card manufacturers, silicon supplier and Microsoft.
X
4
6
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5
3
3
M
a
x
X
4
6
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5
3
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O
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p
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S
y
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m
)
O
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)
EPROM
M
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)
M
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m
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)
i
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n
n
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a
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N
N
e
e
t
t
w
w
o
o
r
r
k
k
i
i
n
n
or
Flash
ROM. BIOS controls Input/output devices and other hardware
g
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)
90
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O
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M
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a
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ATA/66
but clock cycle time is
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