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Microsoft OnNow
The OnNow design initiative is a comprehensive, system-wide approach to
system and device power control. OnNow is a term for a PC that is always
on but appears to be off and that can respond immediately to user or other
requests.
Slow Blinking LED for Suspend-State Indicator
When the CPU goes into a suspend state, the chassis power LED will start
blinking to indicate that the CPU is in suspend mode. When the user presses
any key, the CPU will wake-up and the LED will automatically stop blinking and
remain on.
BIOS Support for USB Keyboard
If the USB keyboard is the only keyboard in the system, the USB keyboard will
work like a normal keyboard during system boot-up.
Real Time Clock Wake-Up Alarm
Although the PC may be perceived to be off when not in use, it is still capable
of responding to preset wake-up events. In the BIOS, the user can set a timer
to wake-up the system at a predetermined time (see page 4-14)
Main Switch Override Mechanism
When an ATX power supply is used, the power button can function as a
system suspend button.
system will enter a SoftOff state. The monitor will be suspended and the
hard drive will spin down.
the whole system to wake-up.
supply provides power to keep the required circuitry in the system alive. In
case the system malfunctions and you want to turn off the power, just
depress and hold the power button for 4 seconds. The power will turn off
and no power will be provided to the motherboard.
External Modem Ring-On
Wake-up events can be triggered by the external modem ringing when the
system is in the SoftOff state. Note that external modem ring-on can only be
used with an ATX 2.01 (or above) compliant power supply.
When the user depresses the power button, the
Depressing the power button again will cause
During the SoftOff state, the ATX power
1-17
Chapter 1: Introduction
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