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1730 29 Jan 68

Disk error - recoverable
[bark?] 210₈ Tk 2 Sa = 1512₈
DR 1, 2, 3, 4, 9, 10, 14, 17, 18 TK 30 DB 136

SRR

1820 29 Jan 68

Ran VINS4, VINS5, and MOLDIU
for 1 hr 30 min all told. No errors
recorded.

SRR

0140 30 Jan 68

D Poole worked on data channel to
show word with parity error in BR when
parity error occurs. MA is 1 or 2 higher
than parity error.

Chased "533 bug". Found that it is
sensitive to + 10 v margins on core 3 1F & 1H
(sense amplifiers) it appears that feeding
+5 V to them solves all problems.

Tried replacing 1997 in 1M14 in core 3
made bug worse, but only slightly.

SRR

PS If I could find the memory looks, I'd
line up core.

SRR