MSI MS 6378 User Guide - Page 50

AGP Aperture Size MB, OnChip USB, USB Keyboard Support, OnChip Sound, OnChipModem, CPU to PCI Write - drivers

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Chapter 3 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. OnChip USB 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. 3-14

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Chapter 3
3-14
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.
OnChip USB
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
.
OnChipModem
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.