SC1041_SAIL_PDP-6_hardware_log_1967-09

04-OCT-67 1630

Machine stopped.

CPMA = 1207 PAR MA = 141204 CORE 3 not awaiting request RDRQ + WRRQ + ~STOP + SYNC + P3 active + P3 last.

DP not running, IOP not running. in CP: MCWR, SF3, SPLIT SYNC + STOP SYNC + EXEC MODE + NON-EX MEM +MB [?] ~=0. on Box 3, MB=0, MA = 1204, memory in Run.

John Sauter

0030 5 Oct 67

ON [ligato?] on MAG TAPE ARE burned out

SRR

0045 5 OCT 67

Ran random number disk that found with great difficulty that MA bit 21 was being dropped by cores 0, 1 + 2. Worked over MEM B[U?]SS cable 2 between core 2 + core 3. [Reg?] went away.

04-OCT-67 1640

Machine stopped, core 2 not awaiting request. same as before except all MB's = 0. CPMA = 1062. PARMA = 101060. Box 2 MA = 1060.

John Sauter

0045 5 Oct 67 cont

Ran "address test" for disk found bit 28 in core 3 marginal on write found marginal signal from core 3 on MEM buss. 1665 in core 3 for P0 needs replacing.

SRR

0110 5 Oct 67 chiller water temp 56°

SRR

0915 5 Oct 67 chilled water temp 56°

Randy

27 010 1000 5 007 67 REPLACED BATTERY IN MIKE AMP FOR SPEACH PROJECT. RANDY 1045 A RAPD SCAN SHOWED THAT THE Following Seem Fine (No ComplaiNTS) AND Running and/or Trouble DST -- SELF TEST NO ERRORS, [CILLER?] 56° AND HOLDING LPT -- NEEDS ANTOHER CLEANiNg AND LigHTS MTA -- [GENEENALY?] DiRTY NEEDS LigHTS

TYD DRM -- MANUAL OKAY NEEDS [ROOM?] CLEANED

DTA -- SEEM TO BE OKAY WITH EXCEPTION OF DTA 3 MARgiNALiTY

CPA -- MA 22 LAMP DOESN'T

FAST MRM -- OKAY CORK φ -- OKAY

" 1 -- " " 2 -- " " 3 -- SEE SRR'S NOTE @ 0045 5 OCT 67 167 -- DATA MISS WON'T LigHT

Kloge Bay -- OKAY COMP - ROOM --> SHiTM; will clear will PREFORM NEEDED WORK ON ABOVE AFTER SAN MODE FINISHED Randy

1100 5 Oct 67

Found that P2 last on core 1 was not being set when DP was the only processor running. [Fount?] T2 was weak. Replaced 1609 for T2 P2 last came on.

SRR

1100 5 Oct 67

MTA had bad [Fudud?] pinch roller bearing Put new pinch roller in. Did not change any clearances on actuator. Should work but no way to check as system was and is down for DSK check out

Randy

1145 5 oct 67

DP is still suffering from 2 bugs

1) A JMS to core 2 seems to cobber the corresponding location in core 0. Perhaps the instruction fetch from core 0 clobbers core 2. In any case the result is the contents of the wrd in core 0 and core 2 are [yelling?] "ore"d together.

2) When the DP is running the CP hangs. It is always waiting for a RD RS from core 3. It appears that this is due either to

another core sending adrs ack when core 3 is requested and the DP running or to core 3 sending ADRS ACK to the CP when the DP is running and then forgets about the CP.

SRR

1230 5 OCT 67

Put disk on self test. Chiller water 56° F

SRR

3:04 6 Oct 67

Disk just turned itself off. Drive motor shut off but not electronics Sector address error was only error light on. Chiller thermometer said 88°.

Turned of electonis.

P. [Pit?]

1200 10/6/67

Line Printer the start stop bug is back with us. Hangs up the whole program

Raj