Installation guide

3-9Remote Annex 2000 Hardware Installation Guide
Chapter 3 ROM Monitor Commands
When the Remote Annex 2000 begins to boot, it displays the load
server host’s IP address. If the unit does not boot successfully after
several attempts, it displays a boot attempt failed message; if the unit
has opened the boot file and an error occurs during the boot process,
it displays a boot error report on the console and returns to the ROM
Monitor. The boot error report can help determine the cause of the
boot failure (see
Boot Error Report on page 4-12).
During a boot, the console may display four possible status symbols:
“.” indicates received data blocks, “?” indicates unanswered requests,
“*” indicates transmission errors, and “! ~XXXX~” is a status word
from the Ethernet chip on the Annex indicating a gross problem with
the Ethernet connection (if this symbol appears in your boot
command display, contact technical support).
The status word “! ~XXXX~”, where XXXX are four hexadecimal
digits, decodes as follows:
8000 = Command complete
4000 = Chip is busy
2000 = Command completed without error
1000 = Command aborted by an abort command
800 = Late collision detected
400 = Carrier lost
200 = CTS lost
100 = DMA underrun
80 = Transmission deferred because link was busy
40 = Collision detected during interframe spacing (SQE/Heartbeat
detected)
20 = Excessive collisions
10 = Reserved
The lowest nibble (bits 3 to 0) are a count of collisions during this
transmission. For example:
~8802~ = Complete, Late collision, 2 collisions
~8841~ = Complete, Late Collision, SQE detected, 1 collision