B&R MAPPC700A-ENG, User Manual

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Software • BIOS options
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249 Panel PC 700 with 945GME N270 CPU board User's Manual V 1.16
Chapter 4 • Software
1. BIOS options
The BIOS settings available for the X945 CPU boards are described in the following sections.
1.1 General Information
BIOS stands for "Basic Input Output System". It is the most basic standardized communication
between the user and the system (hardware). The BIOS system used in the Panel PC 700
systems is produced by American Megatrends Inc.
The BIOS Setup Utility lets you modify basic system configuration settings. These settings are
stored in CMOS and in EEPROM (as a backup).
The CMOS data is buffered by a battery, and remains in the PPC700 even when the power is
turned off (no 24VDC supply).
1.2 BIOS setup and boot procedure
BIOS is immediately activated when switching on the power supply of the Panel PC 700 system
or pressing the power button. The system checks if the setup data from the EEPROM is "OK". If
the data is "OK", then it is transferred to the CMOS. If the data is "not OK", then the CMOS data
is checked for validity. An error message is output if the CMOS data contains errors and the boot
procedure can be continued by pressing the <F1> key. To prevent the error message from
appearing at each restart, open the BIOS setup by pressing the <Del> key and re-save the
settings.
BIOS reads the system configuration information in CMOS RAM, checks the system, and
configures it using the Power On Self Test (POST).
Information:
• The following diagrams and BIOS menu items including descriptions refer to
BIOS version 1.14. It is therefore possible that these diagrams and BIOS
descriptions do not correspond with the installed BIOS version.
• The setup defaults are the settings recommended by B&R. The setup defaults
are dependant on the DIP switch configuration on the baseboard (see section
1.9 "BIOS default settings", on page 293).