American Megatrends 39 Series, Руководство пользователя

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AMI Baby Voyager User's Guide
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Advanced CMOS Setup Options, Continued
S y s t e m B o o t U p C P U S p e e d S y s t e m B o o t U p C P U S p e e d
Sets the speed at which the system boots. The settings are High or
Low . The default speed is Low .
F a s t G a t e A 2 0 O p t i o n F a s t G a t e A 2 0 O p t i o n
Gate A20 controls the ability to access memory addresses above 1 MB
by enabling or disabling access to the processor address line A20. To
remain XT-compatible and be able to access conventional memory
(from 0 - 1024K), address line A20 must always be low, so Gate A20
must be disabled. However, some software programs both enter
protected mode and shut down through the BIOS. For this software,
Gate A20 must be constantly enabled and disabled via the keyboard
controller, which can slow processing considerably.
Fast Gate A20 is an alternate method of enabling Gate A20, which in
turn speeds up programs that constantly change from addressing
conventional memory to addressing memory addresses above 1 MB.
For example, enabling this option makes programs such as network
operating systems execute faster. The settings are Enabled or
Disabled.