Chapter 1 
AGP Aperture Size (MB) 
This setting controls just how much system RAM can be allocated to AGP for 
video purposes. The aperture is a portion of the PCI memory address range 
dedicated to graphics memory address space. Host cycles that hit the aperture 
range are forwarded to the AGP without any translation. The option allows the 
selection of an aperture size of 4MB, 8MB, 16MB, 32MB, 64MB, and 128MB. 
OnChipUSB 
Select Enabled if your system contains a Universal Serial Bus (USB) controller 
and you have USB peripherals. Settings: Enabled, Disabled. 
USB Keyboard Support 
Set to Enabled if your need to use a USB keyboard in the operating system 
that does not support or have any USB driver installed, such as DOS and SCO 
Unix. 
OnChip Sound 
Auto allows the mainboard to detect whether an audio device is used. If the 
device is detected, the onboard audio controller will be enabled; if not, it is 
disabled. Disable the controller if you want to use other controller cards to 
connect an audio device. Settings: Auto, Disabled. 
OnChip Modem 
Auto allows the mainboard to detect whether a modem is used. If the device is 
detected, the onboard modem controller will be enabled; if not, it is disabled. 
Disable the controller if you want to use other controller cards to connect a 
modem. Settings: Auto, Disabled. 
CPU to PCI Write Buffer 
When Enabled, CPU can write up to four words of data into the PCI write 
buffer before the CPU must wait for PCI bus cycles to finish. When 
Disabled, the CPU must wait after each write cycle until the PCI bus signals 
that it is ready to receive more data. 
PCI Dynamic Bursting 
When Enabled, every write transaction goes to the write buffer. Then 
burstable transactions burst on the PCI bus and nonburstable transactions 
do not. 
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