DEUNA error

[davepl1968]

Greetings! I installed a DEUNA pair in my 11X44, and I'm seeing this at BSD startup:

ra0: Ver 6 mod 6
ra0: RA81 size=2940887
attaching de0 csr 174510
de0: hardware error, pcsr1=8002<XPWR>
de0: DEUNA addr aa:00:03:01:11:d7
attaching lo0

And yet everything works fine. The D7 led slowly flashes off and on, the rest are on, and I'm not sure how to read that!

The XPWR makes me think there's something special it's expecting from the DEC transceiver, whereas I'm using an Amazon transceiver (which works, but its unpowered, for one).

Any idea? I could just ignore it, since it works, but I hate error messages

It fails Test 7 in the diag, passes everything else.

Thanks!
Dave

 

[bigfix]

Could it be SQE Test setup on the Xceiver ?

ethermanage.com

 

[cullyrichard]

ZUAB test 7 tests the self test entry on the DEUNA. Perhaps a bad self test rom? I'm really not sure why the self test would fail but the functional test would pass. That is an odd problem.

, pcsr1=8002<XPWR>

I'm not sure what the 8002 number represents, It's not an octal error code, could be hexadecimal, if we interpret it as such, it indicates a cable failure between the modules, but that the module is running (huh?). If we interpret this error code as indicating a XPWR failure exists due to the presence of the XPWR text, there may be an issue with the fuse on the link module or a transceiver power supply fault states.

I would investigate and reseat the cables (the UDA50 is notorious for cable issues, I wonder if these are too) and check the power/fusing.

Best of luck!

 

[davepl1968]

According to Grok, the DEUNA expects the transceiver to pull 1A. Modern ones do not, and it triggers the error, apparently:

Bit 15 (XPWR) = 1 → Transceiver Power failure
The DEUNA (specifically the M7793 Link Module + bulkhead panel) constantly monitors the -15 V supply it provides to the external transceiver over the AUI cable. It expects the transceiver to draw current (≈ 1 A) from that supply. When it doesn't detect proper power draw, it sets the XPWR flag.

 

[cullyrichard]

According to Grok, the DEUNA expects the transceiver to pull 1A. Modern ones do not, and it triggers the error, apparently:

Bit 15 (XPWR) = 1 → Transceiver Power failure
The DEUNA (specifically the M7793 Link Module + bulkhead panel) constantly monitors the -15 V supply it provides to the external transceiver over the AUI cable. It expects the transceiver to draw current (≈ 1 A) from that supply. When it doesn't detect proper power draw, it sets the XPWR flag.

I think Grok may have the bit definition flipped around:



From this manual: www.bitsavers.org/pdf/dec/unibus/DEUNA/EK-DEUNA-TM-PRE_TechMan_Dec82.pdf

I'd agree with the assessment in general though! It seems like things are just fine on the DELUA front. Have fun on the net!