Kontron VMP1 - Manual (Page 74)

VMP1 Bootstrap Loader
ID 19972, Rev. 0101 Page 5 - 8 ® PEP Modular Computers GmbH
5.1.4 BootWaitTime
The command bw can be used to display/change the current BootWaitTime. Available
delays are 1-2-5-10-20-50 seconds. CPU’s without a user LED or without an ABORT
button have a BootWaitTime of at least 5 seconds. In this case, the Bootstrap Loader
will reject a BootWaitTime setting of 1-2 seconds.
The BootWaitTime value is stored in the boot section of the serial EEPROM. This sec-
tion is validated with a CRC code to avoid the setting of random parameters.
To validate an invalid CRC, the appropriate utility from an operating system must be
used or, alternatively, the line bw -f must be issued.
$ $ Important!
If the CRC of the Boot section is not valid, changing the Boot-
WaitTime has no effect because the bw command does not
validate an invalid CRC in order to avoid undesired side
effects. In this case, a default timing of 5 seconds is always
used.
!
Warning!
Please note that validation with the ’bw -f’ command may vali-
date invalid entries, with adverse consequences.