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Chapter 2
44
DRAM RAS# Precharge
This item controls the number of cycles for Row
Address Strobe (RAS) to be allowed to precharge.
If insufficient time is allowed for the RAS to
accumulate its charge before DRAM refresh,
refresh may be incomplete and DRAM may fail to
retain data. This item applies only when
synchronous DRAM is installed in the system.
2T, 3T,
4T
System BIOS Cacheable
Selecting Enabled allows caching of the system
BIOS ROM at F0000h-FFFFFh, resulting in better
system performance. However, if any program
writes to this memory area, a system error may
result.
Enabled
Disabled
Video BIOS Cacheable
Selecting Enabled allows caching of the video BIOS
ROM at C0000h to C7FFFh, resulting in better
video performance. However, if any program writes
to this memory area, a system error may result.
Disabled
Enabled
Memory Hole at 15M-16M
In order to improve performance, certain space in
memory can be reserved for ISA peripherals. This
memory must be mapped into the memory space
below 16MB. When this area is reserved, it cannot
be cached.
Disabled
Enabled
Delay Prior to Thermal
When the CPU temperature reaches a factory
preset level, a thermal monitoring mechanism will
be enabled following the appropriate timing delay
specified in this field. With the thermal monitoring
enabled, clock modulation controlled by the
processor’s internal thermal sensor is also
activated to keep the processor within allowable
temperature limit.
4 Min, 8Min,
16 Min
, 32 Min
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.
4, 8, 16, 32, 64,
128
and 256
Init Display First
This item specifies which VGA card is your primary
graphics adapter.
PCI Slot
Onboard/AGP
On-Chip VGA
This setting determines whether the system RAM
can be allocated to on-chip video controller for
video purposes. When setting to Enabled, up to
128MB system RAM will be allocated to on-chip
video controller.
Enabled
Disabled
On-Chip Frame Buffer Size
Frame Buffer is the video memory that stores data
for video display (frame). This field is used to
determine the memory size for Frame Buffer.
Larger frame buffer size increases video
performance.
1M,
8M
, 16M
Boot Display
Use this field to select the type of device you want
to use as the display(s) of the system.
Auto
, CRT, TV, EFP
Parameter
Description
Options
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