Acrosser AR-B1894 - Manual (Page 32)

4.2.3.4 DRAM RAS# Precharge
This item allows you to select the DRAM RAS# precharge time. The ROW
address strobe must precharge again before DRAM is refreshed. An inadequate
configuration may result in incomplete data. This field is adjustable only when
“DRAM Timing Selectable” is set to “manual”. This field is locked when “DRAM
Timing Selectable” is set to “By SPD” and is automatically determined by the
system. Options: 5、4、3、2.
4.2.3.5 Precharge
Delay
This item allows you to select DRAM Active to Precharge Delay. This field is
locked when “DRAM Timing Selectable” is set to “By SPD” and is automatically
determined by the system. Options: 15、14、13、12、11、10、9、8、7、6、
5、4.
4.2.3.6 System BIOS Cacheable
Enabling this function allows caching of the system BIOS ROM at F0000h-
FFFFFh, which results in better system performance. However, if any program
writes to this memory area, a system error may result. It is advisable to leave it in
default setting. Caching the system BIOS results in better performance than
shadowing the system BIOS.
4.2.3.7 Video BIOS Cacheable
Select “Enabled” to allow caching of the video BIOS which may improve
performance. If any other program writes to this memory area, a system error
may result. Options: Enabled, Disabled (default)
4.2.3.8 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.
4.2.3.9 PCI Express Root Port Function
This item allows to Enable/Disable PCI Express port and select the PCI Express
Compliancy mode from v1.0a to v1.0.
4.2.3.10 On-Chip Frame Buffer Size
This item allows you to setting the VGA memory form share system. Options:
1M(minimum)、8M(Maximum default)
4.2.3.11 DVMT Mode
DVMT/FIXED Memory Size
4.2.3.12 Boot Display
This item allows you to setting CRT monitor only or CRT with EFP(DVI) together
display.