SC1041_SAIL_PDP-6_hardware_log_1967-04

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The model 35 is a hunk of

April 14-67 1:30 Bit 14 was not making it to memory. Replaced 1665 in CPU (lower one). Works. P. Petit

April 14 1967 0330 MI bit 11 won't light. Fault is not with bulb. J. Sauter

April 14 1967 6:30 Worked several hours on Mag tape to get it to recognize EOF's properly. End result: Mag tape now doesn't work at all. I am going home + to bed. P. Petit

Last edit almost 2 years ago by Lars Brinkhoff
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April 15 1967 4:30 Adjusted read delays in Mtape control (556 only). Mag tape seems to understand end of files now. P. Petit

Apr. 15 1967 2000 TV KAMERA changed to 8 bits. Dropping data bit 14. Will fin. tomorrow. D.W.P.

16 Apr. 1500 TV works. Give same 3-bit samples as before, but packed into four-bit bytes, 9 per word. The low-order bit of each byte is 0. D.W.P.

Last edit almost 2 years ago by Lars Brinkhoff
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April 16, 1630 Magtap snip file (MTAPE ? 16) and back space file operations are not working. Will be happy to demonstrate Raj Reddy

April 17 1000 I checked MTA and it seems okay but think maybe some bug in the software Randy

Apr 17 2330 Microtapes seem marginal-system source tapes read with error on DTA 3, DTA 4 ID bus trouble? P. Saunders.

17 Apr - wrote a whole set of mag tape routines; checked them; found no trouble. R

18 Apr [Arams] programs use dump mode. I have [?] been succesfully using dump mode for a month except it occasionally looses a character after using the tape a few times. So I tried to use buffered mode. EIther there are some software bugs or the manual isn't clear enough about what you might [?]

Last edit about 5 years ago by shiiyuri
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and what you might not do. Raj Reddy.

4-18-67 9:00 This morning I clearned all the DTA heads, checked stop time and hubs - cleaned out MTA heads, vaccum columns etc. cleaned up LPT - all above units seem [mech?] okay save for some slight fraying on MTA forward capstone drive belt

4-18-67 1940 TTYI doubles characters Fred Hansen (It won't if you don't bang on it)

4/20/67 TTY3 is missing a screw on part of the thing which [moves?] the direction of the ribbon. Consequently the ribbon doesn't move. P. Petit

No part for above

Last edit almost 2 years ago by Lars Brinkhoff
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20 April 1967

CORE PARITY ERROR, LOCATION 000000043747 OPND = 000000017746 PC = 750000025775 INSTR = 202101000000 DATE = 000635721550 TIME = 536:22

CORE PARITY ERROR, LOCATION INDETERMINATE PC = 750000025775 INSTR = 202101000000 DATE = 000635721613 TIME = 606:53

21 April 1:00 The 167 terminates after one work of transmission from the TV regardless of the word count given to it. Pingle

21 April 2:30 There was a wiring hack in the disk [klype?] that held wc = -1 to ground so the above complaint was fixed Randy.

2 24 Apr 67 1522 Found lab supply for offset to audio input disconnected. It was over on table where Randy was fildding with his movie camera last night. Reconnected supply.

Last edit about 5 years ago by shiiyuri
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