Aaeon 9LIF5 User Manual page 30

Chapter 3
DRAM RAS# Precharge
This item controls the idle clocks after issuing precharge command to the DRAM.
System BIOS Cacheable
Enabling this function 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. It is advised to leave this setting. Caching the system
BIOS results in better performance than shadowing the system BIOS.
Video BIOS Cacheable
Enabling this function will allows caching of the video RAM, resulting in better system
performance. However, if any programs write to this memory area, a system error may
occur.
Memory Hole at 15M-16M
Enabling this function will reserve the memory address space between 15MB and 16MB
for ISA expansion cards. However, it will also result in not allowing the system to have
access to memory above 16MB. Please note that some expansion cards require this
setting to be enabled. The default setting is Disabled. If Auto Configuration is enabled,
you must set the DRAM timing function to 60ns or 70ns, depending on the type of
DRAM you install.
Delayed Transaction
Available options: [Disabled] and [Enabled].
Delay Prior to Thermal
Available options: None, 4, 8, 16, and 32 min.
AGP Aperture Size
This function determines the amount of system memory that is given to the AGP card.
Options range from 4MB to 256MB. This is a dynamic memory allotment in that the
AGP card will only use the amount of memory that it needs. The remaining memory,
which is not in use, will be available for the system. For example, if 16MB is allotted to
the AGP card and the card only needs 8MB, the remaining 8MB will be available for
system use.
On-Chip VGA
This enables / disables the onboard VGA functions. By default it is set to [Enabled].
On-Chip Frame Buffer Size
The onboard VGA will share system's memory buffer. You may adjust the size of the
shared buffer size. Available options: [1MB], [8MB]
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