KEBA HT401-222/NCO-4 O/21049 Digital I/O Template

Network Auto Boot is a software routine contained in the 177Bug EPROMs that provides a mechanism for booting an operating system using a network (local Ethernet interface) as the boot device. The Network Auto Boot routine automatically scans for controllers and devices in a specified sequence until a valid bootable device containing a boot media is found or the list is exhausted. If a valid bootable device is found, a boot from that device begins. The controller scanning sequence goes from the lowest controller Logical Unit Number (LUN) detected to the highest LUN detected.Following this message there is a delay to allow you to abort the Auto Boot process if you wish. Then the actual I/O begins: the program pointed to within the volume ID of the media specified loads into RAM and control passes to it

Network Auto Boot is controlled by parameters

 contained in the NIOT and ENV commands. These parameters allow: 

❏ Selection of specific boot devices

❏ Selection of systems 

❏ Selection of files

❏ Programming of the Boot delay Refer to the ENV and NIOT commands in the Commands Table in this Appendix for more details. Also refer to the ENV parameters in Appendix D.

Restarting the System 

You can initialize the system to a known state in three different ways: ❏ Reset ❏ Abort ❏ Break Each has characteristics which make it more appropriate than the others in certain situations. The debugger has a special feature upon a reset condition. This feature is activated by depressing the RESET and ABORT switches at the same time. This feature instructs the debugger to use the default setup/operation parameters in ROM versus your setup/operation parameters in NVRAM. This feature can be used in the event your setup/operation parameters are corrupted or fail to pass a sanity check.

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