103
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
G
G
l
l
o
o
s
s
s
s
a
a
r
r
y
y
A
A
C
C
9
9
7
7
Basically, AC97 specification separates sound/modem circuit to two parts, digital processor and a
CODEC
for analogy I/O they
into motherboard main chipset, the cost of sound/modem
A
A
C
C
P
P
I
I
(
(
A
A
d
d
v
v
a
a
n
n
c
c
e
e
d
d
C
C
o
o
n
n
f
f
i
i
g
g
u
u
r
r
a
a
t
t
i
i
o
o
n
n
&
&
P
P
o
o
w
w
e
e
r
r
I
I
n
n
t
t
e
e
r
r
f
f
a
a
c
c
e
e
)
)
ACPI is the power management specification of PC97 (1997). It intends to save more power by taking full control of power
management to operating system and bypass
BIOS
are linked by AC97 link bus. Since digital processor can be put
onboard solution can be reduced.
. The chipset or super I/O chip needs to provide standard register interface
o operating system (such as Windows 98). This is a bit similar as the
PnP
t
register interface. ACPI defines ATX momentary soft
ower switch to control the power state transition.
A
A
G
G
P
P
(
(
A
A
c
c
c
c
e
e
l
l
e
e
r
r
a
a
t
t
e
e
d
d
G
G
r
r
a
a
p
p
h
h
i
i
c
c
P
P
o
o
r
r
t
t
)
)
AGP is a bus interface targeted for high-performance 3D graphic. AGP supports only memory read/write operation and
ingle-master single-slave one-to-one only. AGP uses both rising and falling edge of the 66MHz clock, for 2X AGP, the data
transfer rate is 66MHz x 4byte x 2 = 528MB/s. AGP is now moving to 4X mode, 66MHz x 4byte x 4 = 1056MB/s. AOpen is the
irst company to support 4X AGP motherboards by both AX6C (Intel 820) and MX64/AX64 (VIA 694x), started from Oct 1999.
p
s
f
