Compaq W4000 Manual De Usuario

Technical Reference Guide 

System OFF  

 
There are two ways to turn the system off:  
 
1.  Software shut-down as directed by the O/S. This, being the normal procedure, allows 

a NIC driver to re-arm the NIC for a Magic Packet™ 

2.  Press and hold the power button for longer than 4 seconds (not recommended unless 

necessary).  

 

 

 
Any of the following activities will cause the system to wake up: 
 

♦  Keyboard  
♦  Mouse  
♦  Ring Indicate  
♦  RTC alarm  
♦  Magic Packet  

 
The hard drive will not spin up until it is accessed. Any hard drive access will cause it to 
wake up and resume spinning. Since the BIOS returns to the currently running software, 
it is possible for the drive to spin up while the system is in Standby with the screen 
blanked.  

 

 

 

The BIOS ROM checks the USB port, during POST, for the presence of a USB keyboard.  This 
allows a system with only a USB keyboard to be used during ROM-based setup and also on a 
system with an OS that does not include a USB driver.  
 
On such a system a keystroke will generate an SMI and the SMI handler will retrieve the data 
from the device and convert it to PS/2 data. The data will be passed to the keyboard controller and 
processed as in the PS/2 interface. Changing the delay and/or typematic rate of a USB keyboard 
though BIOS function INT 16 is not supported. 
 
 
 

 

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