BIOS Quick Reference • CC5-RAVE
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EKF Elektronik GmbH * Philipp-Reis-Str. 4 * D-59065 HAMM (Germany)
Tel. +49 (0)2381/6890-0 * Fax. +49 (0)2381/6890-90 * E-Mail [email protected] * Internet http://www.ekf.de
The figure below shows the format of the text-based POST display. The display is very similar if
console redirection through a COM port is used instead. PCI Bus numbers 00 and 01 belong to
devices on the CC5-RAVE, while numbers from 02 off are related to components on the CPCI
backplane and CPCI I/O modules.
If the graphical version of POST has been activated, the BIOS decompresses the main image, and
can display multiple overlaid graphics at various points in POST. EKF could define the entire
sequence and control the timing of the system for an embedded application, and can arrange
to have different graphics displayed on each successive boot of the system. This feature is ideal
for embedded systems that must show evidence of operation during startup, while the
application loads underneath the splash screen. Once the application begins writing to the
screen, the splash screen relinquishes control, providing a seamless graphical progression for the
end user. Please contact EKF in order to arrange a custom specific splash screen (mail to
). When the system is powered on for the first time, you’ll need to configure the
system through the Setup Screen System (described later) before peripherals, such as disk drives,
are recognized by the BIOS. The information is written to battery-backed CMOS RAM on the
board’s Real Time Clock. Should the board’s battery fail, this information will be lost and the
board will need to be reconfigured. The Basic Setup Screen provides an option to disable the
graphical POST and switch to the legacy text-based version. This feature may not permanently
disable the graphical POST if the BIOS adaptation calls for reverting to the graphical form after
so many boots. If you find that the graphical POST comes back after several boots, it is because
this option is enabled for this platform. EKF can arrange to control whether Setup can be used
to dictate the policy, and whether it is permanent or temporary.
