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Maintenance
Table 4- 2. Reporting of Unexpected Results from Self-Test
CODE
LED
INDICATION
INDICATION
HEX
NO.
H
I
J K
L M N
*
DESCRIPTION OF FAILURE
7A
1 1 1 1
o
1 0 1 The 82586 failed to clear its command word.
78
1 1 1 1
o
1 1 1 Self-Test Result reg ister (R15) bi t 0 bad.
7C
1 1 1 1 1 0
o
1 Z-80 stack underflow during self-test.
7D
1 1 1 1 1
o
1 1 Unexpected Z-80 Non-Maskable Interrupt (NMI).
7E
1 1 1
1
1 1
o
1 Unexpected
Z-BO
interrupt.
7F
1
1 1 1 1 1 1 1 The LANIC was reset, but self-test never started, or LED
ci rcu it ry failed.
Certain system resets will freeze
the LANIC processor and leave the LEDs in this state.
This condition, then, only indicates a LANIC failure at
power-on, when the self-test switch is pressed, or when
the LANIC diagnostic starts self-test.
*
ST (Self -Test) LED
Note that the above codes are display,';u without the "*" LED flashing.
11/85
4-8
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