Abit SX7-533 User Manual page 53

Introducing the BIOS
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Secondary Slave Prefetch:
Two options are available: Disable or Enable. The default setting is Enable. The onboard IDE drive
interfaces supports IDE prefetching for faster drive accesses. If you install a secondary add-in IDE
interface, set this field to Disable if the interface does not support prefetching.
Audio Device:
Two options are available: Disabled or Enabled. The default setting is Enabled. This item allows you to
enable or disable the onboard audio controller.
USB Device:
Two options are available: Disabled ) Enabled. The default setting is Enabled. This should be enabled if
your system has a USB device installed on the system board and you wish to use it. If you add a higher
performance controller, you will need to disable this feature.
USB Legacy Support:
Two options are available: Disabled ) Enabled. The default setting is Enabled. If your operating system
supports a USB device natively, please set it to Disabled. Only in some situations, such as in a pure DOS
environment that does not support a USB legacy device, should you set it in Enabled. What's the USB
legacy device? For example: USB floppy, USB keyboard and USB mouse, etc.
OnBoard FDC:
Three options are available: Auto ) Disabled ) Enabled. The default setting is Auto. This is used to
enable or disable the onboard FDD Controller. If you add a higher performance controller, you will need
to disable this feature.
Onboard Serial PortA:
Five options are available: Disabled ) 3F8/COM1 ) 2F8/COM2 ) 3E8/COM3 ) 2E8/COM4. The
default setting is 3F8/COM1. This item allows you to determine which I/O address the onboard serial
portA controller will access.
Onboard Serial PortB:
Five options are available: Disabled ) 3F8/COM1 ) 2F8/COM2 ) 3E8/COM3 ) 2E8/COM4. The
default setting is 2F8/COM2. This item allows you to determine which I/O address the onboard serial
portB controller will access.
Serial PortB Mode:
Four options are available: Normal ) 1.6us ) 3/16 Baud ) ASKIR. The default setting is Normal.
When you select the item Normal, then the following item will not appear.
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IR Pin Select:
Two options are available: IRRX/IRTX or SINB/SOUTB. The default setting is IRRX/IRTX. If you
choose IRRX/IRTX, your motherboard must support a COM port IR KIT connection. Otherwise, you
can only choose the SINB/SOUTB to use the IR header on your motherboard to connect your IR KIT.
Please use the default setting.
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User's Manual