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Maintenance
Table 4-1. Self-Test LEDs and Subtest Descriptions (Continued)
CODE
LED
INDICATION
HEX
NO.
H
I
J
K
L M N
*
SUBTEST
DESCRIPTION
27
0 1 0 0 1 1 1 1 82586
Interrupt
28
0 1 0 1 0 0 0 1 82586
Reset
29
0 1 0 1 0 0 1 1 PBUS register
addressing
2A
0 1 0 1 0 1 0 1 82586
RAM addressing
2B
0 1 0 1 0 1 1 1 82586
Diagnose
2C
0 1 0 1 1 0 0 1 8023
Loopback
20
0 1 0
1 1
0 1
1
82586
Write to FIFOs
2E
0 1 0
1 1 1
0
1
MAU
Loopback on medium
*
ST (Self- Test) LED
The final test in table 4-1, the MAD loopback test, sends the following frame on the coaxial cable:
DESTINATION ADDRESS
=
SOURCE ADDRESS
=
the unique station address
of this LANIC, from the station address PROM,
and which may also be found on the LANIC'S
identifying label
TYPE FIELD:
2 bytes containing the data field length, 1134 bytes
DATA FIELD:
3 SAP bytes - 0, 1, 3EH - identifying this frame as a
test response frame with null DSAP and SSAP
31 ASCII bytes
=
ItHP3000 NODE XXXXXXXXXXXX TEST.
II
where XXXXXXXXXXXX is the station address In ASCII
1100 bytes with a binary incrementing pattern
11/85
4-7
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