System Loader Messages; Introduction - HP 9030 Service Manual

3-10
Testing and Troubleshooting
System Loader Messages
Introduction
The System Loader is a program which resides on ROM in the computer. It contains the loader
self-tests and causes the computer to search for and load an operating system. If the computer is
unable to locate and load the test system, or any operating system, a message is displayed on the
system console and/or indicated by the 10 LEOs after pressing MEM DUMP (Chapter 2). Each of
these messages is explained below. Possible causes for many of the messages are provided. If the
message begins with "ERROR:" the system halts after issuing the message. If the message begins
with "NOTE:" the message provides information and the computer continues operating.
If the message you recieve indicates a hardware failure, call your HP Customer Engineer for
service. If the operating system can be loaded, the system functional tests may be run to assist you
in determining what component has failed.
Often the computer attempts to identify the device to which it was' 'talking" when the message was
generated. The trailer "SELECT CODE NNNNN" (or "SELECT CODE NN") is appended to the
message to indicate which select code (I/O port) of the computer caused the problem.
Trailer
NNNNN
indicates Rev. A loader select codes. To find the lOP divide the number by eight and
subtract one. To find the Select Code (slot) divide the number by eight and the REMAINDER is the
slot number.
Example:
Where:
NNNNN
is 21
2~
Remainder
~
2 - 1
=
lOP numbe; 'Slot
n~mbe;
Trailer
SELECT CODE NN
indicates Rev. B loader select codes; 0 through 7
=
1st lOP, 8 through 15
=
2nd lOP, and 16 through 24
=
3rd lOP.
The HP 9030 and HP 9040 have seven
110
slots available. They are associated with select codes 0
thru 6 with the top slot being select code
O.
Select code 7 is used for the internal SCM board.
The upper left slot on an
110
expander, when viewed from the rear, is the lowest number select
code on the
110
expander.