Proface PS4800 - 19 Panel PC" - Manual (Page 76)

PS-4000B Series User Manual
76
BIOS Options
General Information
BIOS stands for "Basic Input Output System". It is the most basic communication
between the user and the hardware.
The BIOS Setup Utility lets you modify basic system configuration settings. These
settings are stored in CMOS and in an EEPROM (as a backup).
The CMOS data is buffered by a battery (if present), and remains in the PS-B unit
even when the power is turned off ( 24 Vdc power supply is disconnected).
BIOS Setup and Boot Procedure
BIOS is immediately activated when switching on the power supply of the PS-B unit
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. A message appears if the
CMOS data contains anomalies, but you can continue the boot procedure by
pressing the [F1] key. To prevent the 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).
When these "preliminaries" are complete, the BIOS seeks the operating system
from the data storage devices available (hard drive, floppy drive, etc.). BIOS
launches the operating system and hands over to the operating system control of
system operations.
To enter BIOS Setup, the [DEL] key must be pressed after the USB controller has
been initialized as soon as the following message appears on the monitor (during
POST):
"Press DEL to run SETUP"