130

120

0115 18 Dec 67
Traced the problem with bit 9 picking
up in Ampex memory to poor noise margins
on interface bay 3. Running +10 v up 1.60
makes problem to go away.
SRR

0148 18 Dec 67
Parity error 11527 Reading
Data = 004000 011502
Disk should not have been touching
that part of core.
SRR

0247 18 Dec 67
Parity error at 533
Data=777757000000 should have been 777777000000
F6A
Disk was transferring to Disk
from 160002 and below
Disk was operating normally (?)
(no error lights.)
Split sync was on.
SRR

0258 Parity error at 533
Data = 777757 000500 should have
been 777777 000000
Disk was transferred to Disk
ending at 160002 split sync