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3 revisions	Soazdrmm at Aug 25, 2020 06:56 PM	Compared with
Aug 25, 2020 Soazdrmm Jun 02, 2019 margstr Mar 30, 2018 Stanford University Archives	10 [notebook page] 6 [printout taped to page] CORE PARITY ERROR, LOCATION INDETERMINATE PC = 340000004506 INSTR = 402000001134 DATE = 000641046230 TIME = 1020:35 M. H. H.[handwritten] [end of printout] 9 JAN 68 - - 0700 CHASED 533 BUG (SEE PREVIOUS PAGE) FOR MANY HOURS. OCCURS ONLY IN CORE 3 LOC'S WITH X-SELECT 120-137 (121, 122, 131, 132) REPLACED OR SWAPPED ALL CONCEIVABLE RELEVANT MODULES (EVEN CMA BITS). NO CHANGE. MYSTERY ! LOOK! A STRAW! [arrow point to:] THEORY: MAYBE DRIVE CURRENTS ARE JUST OUT OF TUNE. TRY THOROUGH TWEAKING. D.W.P & P[super]2 Jan 9, 1968 10:30 Trouble with DTA7 & DTA4 -SEE BELOW, [printout taped to page] . CORE 24 .R LISPXY 24 ?TRANSMISSION ERROR [up arrow]C .R LISPXY 24 ?TRANSMISSION ERROR [up arrow]C . RUN DTA7 LISPXY 24 ALLOC? [end printout]	10 CORE PARITY ETTOR, LOCATION INDETERMINATE PC - 340000004506 INST - 402000001134 DATE - 000641046230 TIME - 1020:35 M. H. H. 9 JAN 68 - - 0700 CHASED 533 BUG (SEE PREVIOUS PAGE) FOR MANY HOURS. OCCURS ONLY IN CORE & LOC'S WITH X-SELECT 120-137 (121, 122, 131, 132) REPLACED OR SWAPPED ALL CONCEIVABLE RELEVANT MODULES (EVEN CMA BITS). NO CHANGE. MYSTERY ! LOOK! A STRAW! ARROW THEORY MAYBE DRIVE CURRENTS ARE JUST OUT OF TUNE. TRY THOROUGH TWEAKING. D.W.R [L P?] Jan 9, 1968 10:30 Trouble with DTA7 & DTA4 -SEE BELOW, . CORE 24 .R LISPXY 24 ?TRANSMISSION ERROR *C . RUN DTA7 LISPXY 24 ALLOC?

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