ENPages
41
2241 8-Oct 67 The printer hacks: [2 symbols] Notice characters don't line up! [arrow pointing above] SOB
6:39 9-Oct-67 Discovered that bit 29 was not getting to core 2 or 3 from the CPU. Found [bedsheet?] board in core 2 with connector pin which had been soldered by a person who was meticulously careful not to get any solder on the wire. Resoldered pin.
Got the DP to solidfy "" Core + Core 2 on a certain fetch. Looked carefully + discovered that at the end of a TMS, the DP was issuing RQ before its
42
MA was through incrementing. The result was that some MA bits were changing (at the Bus plug) as much as 50 n.s. after RQ went out (also at the plug). As a temp. fix and also test to see if this was cause of "[oring?]", I added 2 minutes in the path of the "end of JMS" (EJS) pulse for delay. The DP stopped "[oring?]" core 0 & 2.
P. [P?t?]
1150 9 Oct 67
Replaced lamp driver transistors for data missed and NON GX MEM on 167 Lamps now light.
SRR
2255 9 Oct 67
Worked on core 3 hanging CP with DP running problem.
Tried replacing SA STRB LT-RT PA (D17). Didn't help.
Replaced CP's 1664 in core 3 also found 2 cold soldered joints on connectors.
43
2255 9 Oct 67 cont didn't fix problem. SRR 2301 9 Oct 67 Lilrascope read error. sector 0 frk =1 boid? = 1068 PR= 7, 5, 4,3,2, 18, 15, 13, 11, 10 Reseting Twice Did Not Fix Gives same error. except Band= 1. 05 8 correction: Band is always 105 permant Read error called Leo Van Lahr (Librascope) at 2307. SSR 2320 9 Oct 67 DP hangs with riven? on but doing nothing (maybe in JRS) 0010 10 Oct 67 Labroscope back up Down 1:03 SRR
44
0645 10-OCT-67
Mag tape drive does not work: tape has trouble moving. Perhaps pinch rollers too tight? Worked OK after a few minutes.
J. Sauter
0800 10-OCT-67
Disk shut itself off. Called Dutch. Shut of electronics. (Sector address error, read error + write error were on). Chiller temp is 89°.
John Sauter
1030 10/10/67
TTY 1 machine [gums?]
Raj
45
10/19/67 1400
Input errors on DTA5 went away when I changed drives.
[Puigl?]
10/10/67 2120
Core 1 and Bit 6 are incompatible
2330 10 Oct 67
Replaced 2 transistors for Bit 6 --> [COMB?] in 1665 for P3 Left Data in C1.
Ran BLT for 4 min
Ran OK
Put system back up
SRR
0100 11 Oct 67
More on DP-CP Relationship.
WHen core 3 fails to send RD RS to CP the CP MB is in at least 3 cases zero.
AW RQ is not obviously turning on too
