HP 30242 Installation And Service Manual page 54

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 re g i s t e r (R
15 )
bit
0
bad.
7C
1
1
1 1 1 001 Z-80
stack underflow during self-test.
70
1
1 1 1
1
o
1
1
Unexpected
Z-80
Non-Maskable Interrupt (NMI).
7E
1 1 1 1
1
1
0 1
Unexpected
Z-80
interrupt.
7F
1
1
1
1
1 1 1 1
The LANIC was reset, but self-test never started, or LED
circuitry failed. Certain system resets will freeze
the LANIC processor and leave the LEOs in this state.
This condition, then, only indicates a LANIC fai lu re 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 displayed without the
"*"
LED flashing.
Feb 85
4-8