Справочник Пользователя для Aopen dx3rplusu
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Basically, AC97 specification separates sound/modem circuit to two parts, digital processor and a
CODEC
for analog I/O they are linked by AC97 link bus. Since digital processor can be put into
motherboard main chipset, the cost of sound/modem onboard solution can be reduced.
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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
. The chipset or
super I/O chip needs to provide standard register interface to operating system (such as Windows
98). This is a bit similar as the
PnP
register interface. ACPI defines ATX momentary soft power
switch to control the power state transition.