Acrosser AR-B1740 - Manual (Page 26)

DRAM RAS Precharge
The third part of the x-y-z notation used in SDRAM, the other two being CAS and RAS to
CAS. Like its brethren, it's better lower but also more stressful lower. See the pattern 2.5 is
only available with DDR.
DRAM Data Integrity Mode
This BIOS feature controls the ECC feature of the memory controller.
System BIOS Cacheable
Allows the system BIOS to be cached for faster system performance.
Video BIOS Cacheable
This item allows you to "Enabled" or "Disabled" on Video BIOS Cacheable.
Memory Hole At 15M-16M
If you enable this feature, 1MB of memory (the 15th MB) will be reserved exclusively for the ISA
card's use. This effectively reduces the total amount of memory available to the operating
system by 1MB. If you disable this feature, the 15th MB of RAM will not be reserved for the ISA
card's use. The full range of memory is therefore available for the operating system to use.
However, if your ISA card requires the use of that memory area, it may then fail to work.
Delayed Transaction
The chipset has an embedded 32-bit posted write buffer to support delay transactions cycles.
Select Enabled to support compliance with PCI specification version 2.1.
Delay Prior to Thermal
Controls the activation of the Thermal Monitor's automatic mode. It allows you to determine when
the Pentium 4's Thermal Monitor should be activated in automatic mode after the system boots.
For example, with the default value of 16 Minutes, the BIOS activates the Thermal Monitor in
automatic mode 16 minutes after the system starts booting up.
AGP Aperture Size
Options : 4, 8, 16, 32, 64, 128, 256
This option selects the size of the AGP aperture. The aperture is a portion of the PCI memory
address range dedicated as graphics memory address space. Host cycles that hit the aperture
range are forwarded to the AGP without need for translation. This size also determines the
maximum amount of system RAM that can be allocated to the graphics card for texture storage.
AGP Aperture size is set by the formula : maximum usable AGP memory size x 2 plus 12MB.
That means that usable AGP memory size is less than half of the AGP aperture size. That's
because the system needs AGP memory (uncached) plus an equal amount of write combined
memory area and an additional 12MB for virtual addressing. This is address space, not
physical memory used. The physical memory is allocated and released as needed only when
Direct3D makes a "create non-local surface" call.
On-Chip VGA
If your system contains a VGA controller and you want to activate it, select Enabled. The
next option will become available.
On-Chip Frame Buffer Size
The On-Chip Frame Buffer Size can be set to 1MB or 8MB. This memory is shared with
system memory.
Boot Display
This option let you select the display devices.
Panel Number
This option let you select the type of panel.
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