Chapter 3 | |
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"Timing Constraint Cntl:
Two options are available: Slow ) Normal. The default setting is Slow. Timing Constraint Control on DDR SDRAM
"GW Write Mask AGP Request (Graphic Window Write Mask AGP Request):
Two options are available: Enabled ) Disabled. The default setting is Enabled. When you set to Enabled, a graphic window write operation will forbid AGP device to access memory until this write operation is finished. When set to Disabled, AGP request can access memory as usual.
CAS Latency Setting:
Three options are available: 2T ) 2.5T ) 3T. The default setting is 2.5T. You can select SDRAM CAS (Column Address Strobe) latency time according your SDRAM specification.
Prefetch Caching:
Two options are available: Disabled or Enabled. The default setting is Disabled. This item controls the prefetch caching for PCI slave control.
Memory Hole at
Two options are available: Disabled or Enabled. The default setting is Disabled. This option is used to free up the memory block
AGP Aperture Size:
Seven options are available: 4MB ) 8MB ) 16MB ) 32MB ) 64MB ) 128MB ) 256MB )Back to 4MB. The default setting is 64MB. 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