Advantech ARK-6310, Руководство пользователя, Страница: 61 / 96

49 ARK-6310 User Manual
Chapter 4
B
IOS Setup
4.5.2.17 Logo (EPA) Show
This item allows you enable/disable the small EPA logo shown on screen during the
POST step.
4.5.3 Advanced Chipset Features
This section allows you to configure the system based on the specific features of the
installed chipset. This chipset manages bus speeds and access to system memory
resources, such as DRAM and the external cache. It also coordinates communica-
tions between the conventional ISA bus and the PCI bus. It must be stated that these
items should never need to be altered. The default settings have been chosen
because they provide the best operating conditions for your system. The only time
you might consider making any changes would be if you discovered that data was
being lost while using your system.
The first chipset settings deal with CPU access to dynamic random access memory
(DRAM). The default timings have been carefully chosen and should only be altered
if data is being lost. Such a scenario might well occur if your system had mixed speed
DRAM chips installed so that greater delays may be required to preserve the integrity
of the data held in the slower memory chips.
4.5.3.1 DRAM Timing Selectable
This item allows you to select the DRAM timing value by SPD data or Manual by
yourself. Choices: Manual, By SPD.
4.5.3.2 CAS Latency Time
This item controls the time delay (in clock cycles - CLKs) that passes before the
SDRAM starts to carry out a read command after receiving it. This also determines
the number of CLKs for the completion of the first part of a burst transfer. In other
words, the lower the latency, the faster the transaction. Choices: 2, 2.5.
Table 4.18: Logo (EPA) Show
Item Description
Enabled EPA Logo show is enabled
Disabled EPA Logo show is disabled