Digital Equipment DEC 3000 600 AXP, Service Information

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NI Diagnostic
Testing in service mode provides a full complement of
patterns, rather than a single pattern. Additionally, the full
addressing range is tested for DMA read/write access.
Running NI
Diagnostics Before testing, you must either connect the thickwire loopback
connector (12-22196-01) to the AUI Ethernet port or connect
the port directly to the network. You must also verify that
Thickwire has been selected. Failure to do so results in an
external loopback failure. See Figure 6–2, feature
"
for the
port’s location and Table 6–2 for a description.
To run the NI diagnostic and subtests, use the TEST command.
>>> T[EST] NI [subtest]
Return
Subtests
Table 9–14 lists the NI diagnostic subtests.
Table 9–14 NI Diagnostic Subtests
Subtests Description
NAR Network address ROM test
REGISTER LANCE Register test
DMA_INIT Initialize LANCE and test DMA logic
test
ILPBK Internal loopback and DMA test
INTERRUPT Interrupt test
EXT_LPBK External loopback test
CRC
1
Tests internal loopback with CRC check
RX_MISS_BUFF
1
Tests internal loopback with MISS error
COLLISION
1
Tests internal loopback with collision
FILTER
1
Tests internal loopback with address
filter checking
INIT Initializes the NI chip
TX_BUFF
1
Tests internal loopback with transmit
buffer error
1
Diagnostic can only be executed in service mode.
9–19