52

10-17-67 1830

QI Digital output now O.K. Fifth flip flop
in Shift Reg not turning off exchanged if
for the first.
Y DAC output now at -10V will look at
it tomorrow.

Lou

10-18-67 0200

Put Disk on line and ran 1h of
diagnostic. No trouble. Modified random
number generator. Still works.

Memory troubles. box 1 dropped
bit 7 a couple of times (turning an
AOBJN into a BLT, with disasterous
results. IOP got parity error once, MA
ended in 7. PAR ERR STOP switch was
on. Bit 3 was dropped during address
testing at one point. All above effects
went away upon re-running program.

10-18-67 0930

QI Now works. [Load?] Y Pulse was
unable to jump small open circuit in [cable?]

Lou