Advantech PCE-5130, User Manual

Page: 55 / 102

43 PCE-5130 User Manual
Chapter 3
A
ward
BIOS
Setup
! DRAM RAS# Precharge
When the DRAM Timing Selectable is set to [Manual], this field is adjustable.
This setting controls the number of cycles for Row Address Strobe (RAS) to be
allowed to precharge. If no sufficient time is allowed for the RAS to accumulate
its charge before DRAM refresh, refreshing may be incomplete and DRAM may
fail to retain data. This item applies only when synchronous DRAM is installed in
the system. Setting options are [2T] to [5T], and [Auto].
! Precharge Delay (t RAS)
This item allows you to select the value in this field, depending on whether the
board has paged DRAMs or EDO (extended data output) DRAMs. The choices
are: “4” to “15” and “Auto”.
! System Memory Frequency
To adjust the frequency of memory. The choices are: "533MHz", "667MHz" and
"Auto".
! 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
data to this memory area, a system error may occur. The Choices are
“Enabled”, and “Disabled”.
! Video BIOS Cacheable
Selecting “Enabled” allows caching of the video BIOS, resulting in better system
performance. However, if any program writes to this memory area, a system
error may occur. The choices are “Enabled”, and “Disabled”.
! Memory Hole At 15M-16M
Enabling this feature reserves 15 MB to 16 MB memory address space for ISA
expansion cards that specifically require this setting. This makes memory from
15 MB and up unavailable to the system. Expansion cards can only access
memory up to 16 MB. The default setting is “Disabled”.
! PCI-Express Root Port Func
– PCI Express Port 1/2/3/4
The default setting is “Auto.” The choices are “Enabled,” “Disabled,” and
“Auto.”
– PCI-E Compliancy Mode
This allows the user to select the PCI-E compliant mode. The options are
[v1.0], and [v1.0a].
! PEG / Onchip VGA Control
Use this field to select PEG or Onchip VGA. The default is AUTO.
! PEG Force X1
Use this field to select the PEG Force X1. The default is disabled.
! On-Chip Video Memory Size
Use this field to select the On-Chip Frame Buffer Size, Fixed Memory Size and
DVMT Memory Size. The total graphics memory can be up to 128 MB.
! On-Chip Frame Buffer Size
The On-Chip Frame Buffer Size can be set to 1 MB or 8 MB. This memory is
shared with the system memory.
! DVMT Mode
Displays the active system memory mode.
! DVMT / FIXED Memory Size
Specify the size of DVMT / FIXED system memory to allocate for video memory.