Specifications

PC BIOS
PP 41x/03x 10-3
10.2 The PC BIOS Startup Sequence
When the board starts up without operator intervention, it will run a basic Power-On Self-Test
(POST) sequence, including ECC DRAM initialization and a DRAM test. The full DRAM test will be
omitted on subsequent restarts if the BIOS configuration settings have not been changed. Once
the DRAM test has completed, the board will try to boot-load application software from any
attached mass storage medium or through one or both of the Ethernet interfaces.
WARNING: If the V(I/O) supply voltage is not wired on the backplane, the CompactPCI
bridge drive will not operate correctly and a CompactPCI bus device scan would cause
the board to hang. For this reason the BIOS will flash an error code on the POST LED
and halt.
When the PC BIOS starts after changing the battery, losing battery power or after using the CMOS
CLEAR jumper, it may report a CMOS Checksum Error or some other problem. This will be
following by a prompt to the operator to press <F1> to continue or <F2> to enter Setup mode. If no
key is pressed within approximately five seconds, the PC BIOS will continue with its normal startup
sequence. It will also re-calculate the CMOS Checksum to prevent this error occurring again at a
subsequent restart.
Pressing the <F2> key at any time during the PC BIOS startup sequence will result in the BIOS
Setup menu being entered. The Setup menu is quite extensive, and is provided with context-
sensitive help information, which is displayed in the right-hand panel on screen.
NOTE: When the <F2> key is pressed, a few seconds may elapse before the BIOS Setup
menu appears. The PC BIOS will always run BIOS Extensions for any PMC modules it
detects before responding to the key press.