Advanced Chipset Features - Nexcom EBC 572 Series User Manual

4.9 Advanced Chipset Features

Since the features in this section are related to the chipset in the CPU board and all are optimized, you are
not recommended to change the default settings in the setup table, unless you understand the chipset
features.
This section allows you to configure the system based on the specific feat ures of the installed chipset.
This chipset manage bus s peeds and acc ess t o sy stem memory resources, such as DRAM and the
external cache. It also c oordinates communications between the conventional ISA bus and the PCI bus.
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 has mixed speed DRAM chips installed so that great er delays may be required
to preserve the integrity of the data held in the slower memory chips.
Selecting Advanced Chipset Features on the main program screen displays this menu:
Figure 4-5: BIOS – Advanced Chipset Features
System BIOS cacheable
Selecting Enabled allows caching of the system BIOS ROM at F0000h-FFFFFh, res ulting in bett er sys-
tem performance. However, if any program writes to this memory area, a sys tem error may result. The
available choic es are Enabled, Disabled.
EBC572 User' s Manual 42 Chapter 4