Stanford Artificial Intelligence Laboratory Records

Traded 6 with 7. But 6 (2DE11) was microphonic, Traded it with Bit 7 (2 DE 12) Machine worked. Run margins up and down Banded on boards, ets, bugs didn't returned. Found that wiping core. 3 if [4&5?] borads hard caused [arts?] 3 & 4 to be dropped when running disk & having [cp?] ok split cycles, couldn't make it go away. Checked sockets, changed cards, punched connectors, no trouble [founed] trouble not there. Probably not related to " 533 bugs" Machine back lot 0230 SRR 26 Jan. Type 30 goes away randomly when running it will come back again when [---------?] Can't tell if [Hardered?] or softwood [Pingle?] 12:00 1/26/67 D+A Dries 6 and 7 now have [graded?] with no anodizing on the surfice. After instalation ran DECTAPE Test with a static tape No Errors. Fred [Pa------?]

Traded 6 with 7

Bit 6 (2 De 11 was microphonic, Traded it with Bit 7 (2 DE 12 ). Machine worked.

Run margins up and down Banged on boards, etc. bugs didn't Found that wiping core 3 if 485 boards hard caused bits 3 & 4 to be c p ok split cycles. Couldn't make it go away, Checked sockets, changed cards, pinched connectors, no trouble formed troubles not there, Probably not related to " 033 bug " not related to " 033 bug ". [SRP] 26 Jan . Type 30 goes away randomly when viewing it. [--?] will come back again when [reinitalized?]. can't tell if Hardwood or softwood [Pingle?]

12 00 1/26/67 [D+H?] Drives 6 and 7 now have guides with no avoiding on the surface. After instalation ran Dectape Test with a static tape. No [Erross]

Fred Pa------?]

(Pg.58) 48

Traded 6 with 7.

Bit 6 (2DE 11) was microphonic traded it with Bit 7 (2 DE 12). Machine worked

Run margins up and down Banged on board, etc. bugs didn't return.

Found that wiping core 3 if 4 & 5 boards hard caused Arts 3-4 to be dropped when running disk & having C P do split cycles. Couldn't make it go away. Checked sockets, changed cards, pinched connectors. no trouble found trouble not there. Probably not related to " 033 bug ". machine back at 0030 SRP 26 Jan.

Type 30 goes away randomly when running it. [--?] will come back again when [reinitaslized?] can't tell if hardwere is softwere Pinole 12:00 1/26/67 [D + h ?] Drives 6 and 7 now have guides with

no anodizing on the surface. After instalation

ran DECTAPE Test with a static tape. No Errors.

[Ted Pa------?]

26 Jan 68 more of same

Turned off ampex core [1308?] [26?] Jan 68 [APR?]

1830 1-26-68

Line Printer is generating many extra line feeds (such as in the middle of assemblies).

C. Farrell

18:32 LPT also fails to print occasional lines, and varies format of those it prints. It shall henceforth be termed RPG = Random Print Generator

Carl Farrell

[printout]

The III displays 0, 1, 4, 5 were switched on over the weekend, that keeps the [kathoole?] filaments heated. Is this ok? M.H.H.

IT BETTER BE OK. D.P.

1/29/67 10:00

Replaced Format Tape Lamp assembly in Anelex line printer. Also, there are 2 spare hammer modules now at Right hand end of line. They are labled approiately.

Ted Panofsky

1/29/68 1230

After cleaning the 545 Tape Transport we ran Magtst (CUSP2) for 40 minutes. - No errors.

J. Gleason

935 29 Jan 68

Had a burst of parity errors from AMPEX CORE

[printout with annotations]

Restarted at 140, zeroed ampex core. for 30 min, no errors. Ran BLTST for 30 min in ampex core, no errors. The programs running in Ampex core were loaded by loader, which clears fore first and [?]SP which initilizes core, so the errors were not left over from the past. Apparently something hits in bursts.

SRR

--> I have a suspicion that there is a mechanical difficulty.

P. Petit

1/29 2.00 PM

Random error on [?]

[paper obscuring page]

16-65 1/29/68

The Printer skip pages in [?]2 listing.

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

30 January 930 AM

Ran tests on TV in Ampex core. Results as followed

1) Read 57 x 62₈ point rectangle 5762 times Got 66 data misses for 1% error. No parity errors

2) Read 100 x 100₈ point square 4015 times Got: 1454 data misses for 36% errors. 1 core parity error while reading 3 [core parity error] when [displayed?] buffer

[printout]

3) Read 365 x 276₈ point rectangle 4515 times. Got: 2442 data misses for 54% errors 7 core parity errors when doing grey code conversion at end of reads.

[printout]