39

[Notebook page] 35

[printout taped to page]
CORE PARITY ERROR, LOCATION 000000051116 OPND = 623377777777
PC = 350000027043 INSTR = 200102007740
DATE = 000641116611 TIME = 1404:36
[Notes written on printout] 19 JAN 68 CORE 2

1415 19 JAN 68
Parity error since 7 Jan 68
[Information formated in colums]
Core 0 - 0
[Core] 1 - 7
[Core] 2 - 9
[Core] 3 - 4
[Note referring to Core parity errors] 20 error in 12 days. 1.6 parity errors/day

Merory [Memory?] buss between Core 0 & Core 1
seems implicated.
SRR

P.S. Except that there have
been very few parity errors from
Ampes core.
SRR

[printout taped to page]
CORE PARITY ERROR, LOCATION 000000300503 OPND = 777777573526
PC = 750000300420 INSTR = 250140030502
DATE

1820 1/19/68

Looked at TTY4 problem described on page 34:
Found that TTY2 garbled characters when plugged in
to Line Patch 04 in the 630. This again implies that
that the trouble is in the 630. Tried to determined whether
the transmitter or receiver was bad by having TTY2
talk to TTY0 thru Line 04. Transmits + receives without