HP 3000 Diagnostic Manual page 5

The HP 3034lA Interface Hodule Hardware Self-Test is a CPU ROf.1-
resident, microcode diagnostic that verifies correct operation of
the Interface Module's hardware. The self-test can be initiated
either by issuing the the Initiate Self test (SLFT) instruction
from software to the Interface Module's Intermodule Bus Adapter
(IMBA) PCA or by manually actuating the Bus Interface Controller
(BIC) PCA's CPU TEST Switch Sl. Switch Sl is located at center
left on the front edge of the SIC PCA.
The results of the self-test are stored in the computer system's
SLFT "mailbox" memory location MB2 and displayed by 10 LED's (A
thru I and "*") located on the left-front edge of the BIC PCA.
Termination of the self-test is indicated by the BIC PCA's
"*"
LED being cleared (off) and the busy/wait flag (bit 0) in "mail-
box" memory location MB4 being set. The octal value (error code)
contained in MB2 or indicated by A thru I LED's indentify which
portion of the self-test that failed as listed in the following
tables. It should be noted that the error codes contained in the
second table pertain to specific Control Store ROM chips located
on the Processor PCA.
If the self-test is initiated with no peripheral devices attached
to the HP-IB, successful test completion is indicated by %74 in
memory location MB2 and %740 indicated by the A thru I LED's. If
the self-test is initiated with no cold-load device attached to
the HP-IB (e.g., HP 2680A only), successful test completion is
indicated by %75 in MB2 and %750 indicated by the LED's. If the
self-test is initiated with a cold-load device attached to the
HP-IB (e.g., HP7976A), successful test completion is indicated by
%00 in MB2 and %000 indicated by the LED's.
Note
The BIC LED's will momentarily flash error codes %740
and %750 before remaining lit to indicate that a hard
error does not exist and to serve as a warning that a
particular device
i~
not attached to the HP-IB.
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