Kontron VMP3 - Manual (Page 93)

VMP3 NetBootLoader
ID 29230, Rev. 01 © 2005 Kontron Modular Computers GmbH Page 5 - 9
29230
.01.UG.VC.050727/091438
P R E L I M I N A R Y
a valid application is programmed, the command interpreter is only available for the duration of
the boot wait time. If the operator requires the command interpreter for a longer time he must
terminate the boot operation before the boot wait time is exceeded.
Upon initiation of the command interpreter, a prompt is sent to the TERM interface and com-
mands may be entered. To gain access to the NetBootLoader from a remote location via the
Ethernet port FCC1 (FE), a telnet login must be performed. If the boot wait time has not been
exceeded, a telnet login automatically terminates the boot operation and a command prompt
is sent to the telnet remote interface.
Once the operator has control of the NetBootLoader, he may perform any required action. To
continue with the operation of the CPU board, the system must either be cold started or the
operator must issue a “reset” command. In either event, the NetBootLoader is restarted and
the boot operation begins anew.
5.4.3 NetBootLoader Configuration
There are several NetBootLoader commands which provide the operator with the capability to
configure specific parameters which are used by the NetBootLoader for interfacing operations.
These commands are:
• BW (BootWait)
• CBL (Change Bootline)
• DHCP
• NET
• PASSWD
• PF (Port Format)
• SCRIPT
• SQ (Boot Sequence)
Default settings are available for all the above commands except for "dhcp, net, and script”.
5.4.3.1 BW
This command is used to display or set the actual boot wait time used by the NetBootLoader
to delay the boot operation before proceeding with the loading and starting of an application. If
this time is set too short it may only be possible to gain access to the NetBootLoader via the
MC1 (Abort) signal.
The BootWaitTime value is stored in the boot section of the serial EEPROM. This section is
validated with a CRC code to avoid the setting of random parameters.
Note ...
If the CRC of the boot section is not valid, changing the BootWaitTime will have
no effect because the “bw” command does not validate an invalid CRC. In this
case, a default timing of 5 seconds is always used.