163
M
M
X
X
3
3
6
6
/
/
M
M
X
X
3
3
6
6
L
L
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
Gl
ossary
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.
B
B
u
u
s
s
M
M
a
a
s
s
t
t
e
e
r
r
I
I
D
D
E
E
(
(
D
D
M
M
A
A
m
m
o
o
d
d
e
e
)
)
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
O
O
D
D
E
E
C
C
(
(
C
C
o
o
d
d
i
i
n
n
g
g
a
a
n
n
d
d
D
D
e
e
c
c
o
o
d
d
i
i
n
n
g
g
)
)
Normally, CODEC means a circuit that can do digital to analog conversion and also the analog
to digital conversion. It is part of
sound/modem solution.
