O.K., I checked the DC cleanlyness with the scope and it is wonderfully clean. But it's strange. When I first power it on just power the memory, the lights on the key-switch console are all wild (like green and red all at the same time.) Again the DWMBA didn't work. And caused machine checks errors. Again two of the XBIA cards caused the CPU to shut down the moment it was going to test the VAXBI stuff. Can you tell from the transcript below what might be wrong? Whithout XBIA it seems to be working fine. Now I put in just one of them without an XBIB counterpart: #123456789 0123456789 0123456789 01234567# F E D C B A 9 8 7 6 5 4 3 2 1 0 NODE # . A . . . . M M . . . . . P TYP . o . . . . + + . . . . . + STF . . . . . . . . . . . . . B BPD . . . . . . . . . . . . . + ETF . . . . . . . . . . . . . B BPD ?12 Machine check occurred during machine check processing. PC = 2007C25F SAVPSL = 041F1200 ISP = 201403F0 What the heck? Hit the reset button and: #123456789 0123456789 0123456789 01234567# F E D C B A 9 8 7 6 5 4 3 2 1 0 NODE # . A . . . . M M . . . . . P TYP . o . . . . + + . . . . . + STF . . . . . . . . . . . . . B BPD . . . . . . . . . . . . . + ETF . . . . . . . . . . . . . B BPD . . . . . . A2 A1 . . . . . . ILV . . . . . . 32 32 . . . . . . 64 Mb ROM0 = V3.00 ROM1 = V3.00 EEPROM = 2.03/3.07 SN = AG94408846 This time it worked. No VAXBI stuff detected, sure, there is none. #123456789 0123456789 0123456789 01234567# F E D C B A 9 8 7 6 5 4 3 2 1 0 NODE # . A . . . . M M . . . . . P TYP . o . . . . + + . . . . . + STF . . . . . . . . . . . . . B BPD . . . . . . . . . . . . . + ETF . . . . . . . . . . . . . B BPD . . . . . . A2 A1 . . . . . . ILV . . . . . . 32 32 . . . . . . 64 Mb ROM0 = V3.00 ROM1 = V3.00 EEPROM = 2.03/3.07 SN = AG94408846 Now I put the other XBIA in and two XBIBs to talk to. See what happens this time #123456789 0123456789 0123456789 01234567# F E D C B A 9 8 7 6 5 4 3 2 1 0 NODE # A A . . . . M M . . . . . P TYP o o . . . . + + . . . . . + STF . . . . . . . . . . . . . B BPD and boom, the CPU lights went out. What's going on here? hit reset button and: #123456789 0123456789 0123456789 01234567# F E D C B A 9 8 7 6 5 4 3 2 1 0 NODE # A A . . . . M M . . . . . P TYP o o . . . . + + . . . . . + STF . . . . . . . . . . . . . B BPD . . . . . . . . . . . . . + ETF . . . . . . . . . . . . . B BPD Machine Check Stack Frame: 80000011 21800000 2004C79C 00000000 0700130E 00000013 2004C78D 041F0004 PCSTS: 00000888 PCERR: 21800000 PCTAG: 40000000 BCSTS: 01800000 BCERR: 2004D7D0 BCBTS: 20000000 BCP1TS: 20000000 BCP2TS: 20000000 IPORT: 800003D1 XBER: 8000A041 XFADR: 61800000 RCSR: 01280001 Machine Check Stack Frame: 80000011 21800000 2004C79C 00000000 0700130E 00000013 2004C78D 041F0004 PCSTS: 000008C8 PCERR: 21800000 PCTAG: 40000000 BCSTS: 01800000 BCERR: 2004D7D0 BCBTS: 20000000 BCP1TS: 20000000 BCP2TS: 20000000 IPORT: 800003D1 XBER: 8000B041 XFADR: 61800000 RCSR: 01280011 ?12 Machine check occurred during machine check processing. PC = 2004FF02 SAVPSL = 041F1200 ISP = 201403EC Now that I see those machine check issues, I think I've seen those before. It might be that these problems had been waiting for the last year to come up. I guess I should be replacing everything with the spare set of guts that I have boxed up. This isn't right, and I don't know what else to do. cheers, -Gunther -- Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org Medical Information Scientist Regenstrief Institute for Health Care Adjunct Assistant Professor Indiana University School of Medicine tel:1(317)630-7960 http://aurora.regenstrief.org