VAX11/780 memory / UNIBUS interaction???

Hi, I'm still debuggingmy VAX 11/780 that doesn't pass full diagnostics. Here is a dump of the micro-diagnostic run and second stage SBI/memory/options diagnostics: CPU HALTED,SOMM CLEAR,STEP=NONE,CLOCK=NORM RAD=HEX,ADD=PHYS,DAT=LONG,FILL=00,REL=00000000 INIT SEQ DONE HALTED AT 00000000 (RELOADING WCS) LOAD DONE, 0800 MICROWORDS LOADED VER: PCS=01 WCS=0E-10 FPLA=0F CON=V07-00-L ?WARNING-WCS & FPLA VER MISMATCH ?FILE NOT FOUND ZZ-ESKAB V14.0 ESKAD -- V13.1 01,02,03,04, NO. OF 1K BANKS OF WCS = 0002 05,06,07,08,09,0A,0B,0C,0D,0E,0F,10,11,12,13,14,15,16,17, 18,19,1A,1B,1C,1D,1E,1F, ESKAH-V13.2 20, SYSTEM ID REGISTER = 0140B63E KE780 FPLA NOT PRESENT 21,22,23,24,25,26,27,28,29,2A,2B,2C,2D,2E, 2F,30,31,32,33,34,35,36,37,38,39,3A,3B,3C, END PASS 0001 MOUNT FLOPPY ZZ-ESZAD & TYPE "DI" MIC>DI ESKAR-V2.0 3D,3E, CPU TR = 00000010 MS780H 256K CHIP AT TR 00000001 LOWER CNTRLLR MAX ADDRESS+1= 01000000 UPPER CNTRLLR MAX ADDRESS+1= 01000000 DW780 AT TR 00000003 RH780 AT TR 00000008 RH780 AT TR 00000009 3F,40,41,42,43,44,45,46,47,48,49,4A,4B,4C,4D,4E,4F,50,51,52, MS780-E/H IO BASE ADDRESS = 20002000 LOWER CONTROLLER MAX ADDR + 1 = 01000000 BOARD NUMBER = 00000000 NUMBER OF CRD ERRORS = 00000000 BOARD NUMBER = 00000001 NUMBER OF CRD ERRORS = 00000000 BOARD NUMBER = 00000002 NUMBER OF CRD ERRORS = 00000000 BOARD NUMBER = 00000003 NUMBER OF CRD ERRORS = 00000000 MS780-E/H IO BASE ADDRESS = 20002000 UPPER CONTROLLER MAX ADDR + 1 = 01000000 BOARD NUMBER = 00000000 NUMBER OF CRD ERRORS = 00000000 BOARD NUMBER = 00000001 NUMBER OF CRD ERRORS = 00000000 BOARD NUMBER = 00000002 NUMBER OF CRD ERRORS = 00000000 BOARD NUMBER = 00000003 NUMBER OF CRD ERRORS = 00000000 53, MS780-H 256K CHIP AT TR 00000001 M8376 ROMS OK 54, ?ERROR: 10B8 TEST: 01FF SUBTEST: 0001 DATA: 20002000 20002008 FFFFFFFF FFFFFF00 FFFFFFFF FFFFFFFF 00000000 00000000 TRACE: 00, FAILING MODULES: M8375-L, M8376, I had two more M8375 and another M8376 that came with the VAX 11/785 board set that I bought from Jeffrey Sharp last year. But none of the M8375s changed the problem. When I replaced the M8376 it was even worse: ESKAR-V2.0 3D,3E, CPU TR = 00000010 DW780 AT TR 00000003 RH780 AT TR 00000008 RH780 AT TR 00000009 NO MEMORY CNTRLLRS DEP MS780EH ADDR IN RC0, TYPE LO ?ERROR: 11FA TEST: 0180 SUBTEST: 0001 TRACE: 00, FAILING MODULES: M8376, this time it didn't even go beyond test 3F. So, I put the old M8376 back. And tried to swap the lower and upper M8375s to see if I'd get the problem on the other end. After all, I assume that the message: 54, ?ERROR: 10B8 TEST: 01FF SUBTEST: 0001 DATA: 20002000 20002008 FFFFFFFF FFFFFF00 FFFFFFFF FFFFFFFF 00000000 00000000 TRACE: 00, FAILING MODULES: M8375-L, M8376, means that the M8375-L with "L" for LOWER is causeing the problem. So, I expected M8375-U to be blamed next. But not so. I always get M8375-L, M8376 error. However, what's really strange and the focus of my question is that the outcome depends on whether or not the UNIBUS cabinet is powered on or off. If I have the UNIBUS powered on I get that above error. However, when I have the UNIBUS off, I get this: 54, ?TIMEOUT IN TEST 01FF UPC= 1241 That is, TEST 01FF always fails, but when UNIBUS is off it just times out, when UNIBUS is on we get that failing modules error. Isn't there a way to decouple the UNIBUS issue from the memory subsystem diagnostics? I sort of hope that the boards really aren't broken but some other wires are crossed? I appreciate any advice of you VAX veterans out there! thanks, -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