SC1041_SAIL_PDP-6_hardware_log_1967-04

15:05 Core 0 not AWRQ P2 LAST PMA 12374 Weiker

1725 1 May 67 Core 1 not AW REQ P2 Last SRR

8:50 2 May 67 Lim printer blew all 5 of the circuit breakers (push button) in the back. Turning them on was a sufficient fix. A wild guess would be that there was a power line transient but there is no other evidence of one. P. Petit

1:30 2 May 67 Tweaker the 20KC Clock in A-D [kludge?], it had drifted up to 23 KC for reasons of its own (C15) and changed 6KC clock (C17) to be 10 KC now. Randy

11:05 2 May

630 seemed to stop line scanning, SP, I/O reset ST @ 140 cured it. Randy

11:05 2 May 67

Core 3 not AW REQ P2 Last. SRR

1410 2 May 67 Core 3 Nore AWRQ P2 Last Pingle

1555 2 May Core 3 and core 1 Both AWREQ P2 Last Pingle

1730 2 May 68 Calcomp plotter showed 2 bugs, both intermittend

1) Utter lack of X and Y motion

2) Random Y motion with systematic X motion.

In both cases program seemd to be plotting normally and pem motion always happened. Trouble was not sensitive to connector wiggling or banding on the plotter. Touble disappeared before further testing could be done.

SR Russell

1900 2 May 69

620 REC grp cntr stopped again line 6 scan flag

0845 5-3-67

PLOTTER HACKING Pem up + down but only occasional erratic movement on X + Y

J. Chowning

11:00 5-3-67

I took the plotter apart and checked all connection on the interface, switch, cable, connectors + plotter PC board, ran my own plot command tape with system and it worked fine on F-x +/- y [uD?] pen, checked delays and pulses in plotter and they agree with [manulr?].

Randy

940 3 May

SPACE WAR BUTTONS DO NOT WORK. Bits 30 and 28 are always on. We need new buttons.

Pingle + Reddy

10:00 3 May

R123 in R9 in 167 had bit 20 stuck on

Changing fixed it

Space war buttons now seem to work

Randy

15:15 5-2-67

CTY gives 2 line feeds for price of 1.

Weiker

1530 3 May

LPT sometimes gives "a" for "C"

Pingle

2300 3 May 67

Chased magtape bugs - found that if tape is spacing forward and unit is put in the locals, and rewound, then the magnetic tape control hardware is completely reset. The system, however is not, and waits forever. Restarting system at 140 works.

Also saw the mag tape slop when a file was saved on dectape

Mag tape had

Beginning of tape	short record	EOF	EOF	EOF

PGM was going:

SKIP TO LOG. END OF TAPE MTAPE 1,10

BACKSPACE FILE MTAPE 1, 17

PGM ended up with magtape 1 selected

SRRussell

230 3 May 67

TTY0 loses on both ALT MODE 6 RUBOUT sometimes } printed by LPT

[GNoble?]