Integrated Peripherals - Abit SA7 User Manual

4-12 Chapter 4
AGP Aperture Size:
Seven options are available: 4 MB ( 8 MB ( 16 MB ( 32 MB ( 64 MB ( 128 MB ( 256 MB
(Back to 4MB. The default setting is 64 MB. This option specifies the amount of system memory that
can be used by the AGP device. The aperture is a portion of the PCI memory address range dedicated for
graphics memory address space. Host cycles that hit the aperture range are forwarded to the AGP without
any translation. See http://www.agpforum.org for AGP information.
Graphic Window WR Combin:
Two options are available: Disabled or Enabled. The default setting is Enabled. This register defines the
starting address of the graphic windows for GUI (Graphic Unit Interface), you can enable or disable this
register. It also affect by the Graphic Window Control Register, this register controls accessibility and
effectiveness of this register.
The Graphic Window Control Register specifies the size of the graphic window and indicates that
whether the Graphic Windows Base Address (GWBA) Register and Re-mapping GART Base Address
Register contain valid information or not. It also controls the accessibility of GWBA register.
AGP Fast Write:
Two options are available: Enabled or Disabled. The default setting is Disabled. If your AGP adapter can
support thi sfunction, then you can choose Enabled. Otherwise, choose Disabled. Enabling this item can
improve your system performance, but it may also decrease system compatibility.
AGP Sideband Address:
Two options are available: Enabled or Disabled. The default setting is Disabled. If your AGP adapter can
support thi sfunction, then you can choose Enabled. Otherwise, choose Disabled. Enabling this item can
improve your system performance, but it may also decrease system compatibility.
AGP Capability:
Three options are available: Auto ( 2X ( 4X. The default setting is Auto. If you use the older AGP
adapter that does not support AGP 4X mode, you need to set this item to 2X mode. You can check your
AGP adapter user's manual to know what knid of AGP mode it can support.

4-5. Integrated Peripherals

In this menu, you can change the onboard I/O device, I/O port address and other hardware settings.
SIS OnChip IDE Device:
This item can let you sets several items concerning the SIS OnChip IDE device parameters.
Internal PCI/IDE:
Four options are available: Both ( Primary ( Secondary ( Disabled. The default setting is Both. This
item allows you disable all internal PCI/IDE devices, or enable one of them. Of course you can enable
both PCI/IDE devices as well. The enabled items will apear white in color and disabled items will show
in a blue green color.
SA7