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Frequently Asked Questions
ACPI defines momentary soft power switch to control the power state
transition. Most likely, it uses the ATX form factor with momentary soft power
switch. The most attractive part of ACPI for desktop user is probably the
"OnNow" feature, an idea from notebook.
immediately resume to your original work without the long time waiting from
bootup, entering Win95 and running Winword. The AX5T with Intel TX chipset
can support ACPI.
Q: What is ATX Soft Power On/Off and Momentary Switch?
A: The Soft Power On of the ATX specification means to provide a standby
current for special circuit to wait for wakeup event when main power is off. For
example, Infrared wakeup, modem wakeup, or voice wakeup. Currently, the
most simple usage is to provide standby current for power switch circuit so
that power switch can turn on/off the main power through soft power control
pin. The ATX power specification does not mention anything about the power
switch type. You can use toggle or momentary switch, note that ACPI
specification requires momentary switch for power state control.
AOpen ATX MBs support momentary switch.
Soft Power Off means to turn off system through software, Windows 95
Shutdown function can be used to verify if your mainboard supports soft power
off.
Q: What is the AGP (Accelerated Graphic Port)?
A: AGP is a PCI-like bus interface targeted for high-performance 3D graphic.
AGP supports only memory read/write operation and single-master single-
slave one-to-one only. The AGP uses both rising and falling edge of the
66MHz clock and produces 66MHz x 4byte x 2 = 528MB/s data transfer rate.
Q: Does Pentium, Pentium Pro or Pentium II support Deturbo mode?
A: The Deturbo mode was originally designed to slow down CPU speed for old
applications (especially old games). It uses programming loop to wait or delay
special event. This programming method is considered very bad since the
delay of loop highly depends on the CPU speed and the application fails at
high-speed CPU. Almost all new applications (including games) use RTC or
interrupt to wait event. There is no need for Deturbo mode now. The Turbo
switch is now used as Suspend switch. However, some MBs still support
Turbo/Deturbo function via keyboard. You can set the system to Deturbo by
pressing <Ctrl> <Alt> <->. To back to Turbo mode, press <Ctrl> <Alt> <+>.
Note that the Deturbo mode has been removed in new MBs since these
require more code space in Flash ROM.
Q: Power Management Icon does not appear in the Windows 95 Control Panel
even though the APM under BIOS Setup is enabled.
A-4
This feature allows you to
All the
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