00:17:15 Chris Taylor, President OPCUG: Welcome to all members and guests! Want to join the OPCUG? - https://opcug.ca/join-or-renew/ Welcome to all members and guests! Guests, as always are welcome. If you want to join, see https://opcug.ca/join-or-renew/ 00:21:20 Tom Trottier: You can set up Windows to turn on or off depending on the nearbyness of a Bluetooth device 00:21:29 Bob Herres: Lift-off is scheduled for 7:30 PM sharp! The countdown begins... don't miss it! 00:32:58 Tom Trottier: No window opening? No breezes.... 00:34:08 Stew Bruce: You don't want to open a window in space, the mosquitos are monsters! 00:35:01 Denis Therrien: But only in spring into early summer... 00:35:05 Tom Trottier: Blindfold chess, anyone? 00:35:47 Tom Trottier: Or worse, scrabble.... 00:36:14 Jocelyn Doire: The movie Hidden Figures shows well the math that they needed 00:39:29 Denis Therrien: Mathematically the 60s ended on DEC 31 1970 00:40:01 Tom Trottier: Reacted to "Mathematically the 6..." with ๐Ÿ‘๐Ÿผ 00:40:26 Tom Trottier: & the 20th century Dec 31,2000..... 00:40:52 Tom Trottier: if you can remember the 60's, were you really there? 00:44:09 Coreen: I still have a slide rule too 00:44:22 Alan German (OPCUG Meeting Coordinator): Log is man's best friend! 00:44:30 Carol Pearson: Replying to "I still have a slide..." Me too 00:44:53 Rosemary: Ironmanโ€™s dad? 00:46:25 Tom Trottier: Slide rules are analog 00:46:54 Jocelyn Doire: Used both a slide ruler and an analog computer... 00:48:17 Tom Trottier: Did he use PDP or other minicomputers as a model? 00:54:22 Tom Trottier: The sextant came in the 18th century - they had simpler angle measures earlier 00:55:11 Tom Trottier: LOL 00:55:18 Tom Trottier: Little Old Ladies.... 00:55:39 Carol Pearson: Replying to "Little Old Ladies......" old ladies rule!!! 00:56:34 Stew Bruce: Hey, Don't Mess With Granny (DMWG) 00:57:18 Tom Trottier: I presume all assembly language 00:58:28 Tom Trottier: Steve Gibson GRC.com - spinrite - does his s/w in assembly 00:59:21 Tom Trottier: Assembler is tied to machine language, but has some fancier constructions, "macros" 01:01:05 Tom Trottier: btw pocket calculator came in the 70s 01:03:44 Stew Bruce: Sometimes, a simple interface can be more efficient 01:05:15 Coreen: First version of a robot 01:05:39 Tom Trottier: Usually assembly language programs are smaller and faster. But higher level languages can be more easily optimized. 01:06:11 Tom Trottier: As well as easier to write. 01:08:23 Stew Bruce: Time can be very relative, baselines for something like this are critical. 01:08:42 Jocelyn Doire: What that flashing thing shows? 01:11:13 Tristan: @Jocelyn Doire looks to say "Comp Activity". So I'm guessing shows the computer is processing something. 01:11:14 Tom Trottier: Did they get time and 1/2 for ovetime? 01:12:03 Jocelyn Doire: it makes sense, thanks 01:14:23 Tom Trottier: How do they choose a program? 01:15:20 Stew Bruce: Replying to "How do they choose a..." I think they hit the "Verb" button to choose a program and dig from there 01:16:22 Tom Trottier: If they put in noun-verb, it's like Reverse Polish Notation.... 01:18:04 Tristan: Microsoft PowerShell also utilizes the Verb-Noun concept. For example the command Get-ChildItem. 01:19:54 Steve Parker: Anyone remember the 80's Arcade Game "Lunar Lander"? 01:21:37 Tom Trottier: Was there ever a cue-card discrepancy? 01:21:49 Jocelyn Doire: sounds like an interesting video game. 01:23:08 Stew Bruce: Replying to "Anyone remember the ..." No but, for a bit of an idea of the boring fun of a space maneuver try iss-sim.spacex.com 01:23:30 Steve Parker: I remember it being extremely cumbersome even more so than the Space Shuttle Simulator 01:24:17 Tom Trottier: The inscribed numbers are doubled - do you have to align both numbers for accuracy? 01:25:26 Tom Trottier: You could get a moon landing program for programmable calcullators 01:27:16 Tom Trottier: "Fly by wire" means electronic control - vs hydraulics & levers 01:28:44 Tom Trottier: ie, controls modulated by the computer 01:29:06 Tom Trottier: It's how the 737 max crashed. 2x 01:30:00 Tom Trottier: because the 737 max, in error, overrode the pilot input 01:39:15 Tom Trottier: Enthusiasm..... they are down, and alive 01:39:19 Coreen: ๐Ÿ‘ 01:39:47 Tom Trottier: Radiation effects on memory, cpu? Was the parity bit included because of radiation? 01:40:06 Stew Bruce: I do not understand, the time lapse between earth & the Moon does not seem present in this recording 01:41:40 Tristan: @Stew Bruce looking it up, the communications delay Earth to Moon is about 1.25 seconds. 01:42:18 Tom Trottier: 400km away, radio speed isn 300km/sec 01:42:40 Stew Bruce: Replying to "@Stew Bruce looking ..." Correct, so a round trip of a message and a reply is . . . . 01:44:21 Tom Trottier: We need a 2-second restart! 01:45:01 Tristan: More modern then the moon landing, but the NASA rules for Code Development are interesting. https://en.wikipedia.org/wiki/The_Power_of_10:_Rules_for_Developing_Safety-Critical_Code 01:45:48 Tom Trottier: Behind every great man............. 01:48:28 Tom Trottier: Do they weigh 70 lbs? 01:50:44 Jocelyn Doire: www.ibiblio.org/apollo 01:51:18 Tom Trottier: ' Virtual AGC http://www.ibiblio.org/apollo โ€ข AGC source code https://github.com/chris1garry/Apollo-11 01:51:30 Bob Herres: Incredible, Innovation throughout-I Love the Graphics! This was like Being There! TY Mark!... Did the Astronauts "feel safe" going up in those old machines? or were they just "Very Brave?" 01:51:59 Tom Trottier: oops https://github.com/chrislgarry/Apollo-11 01:52:06 Tom Trottier: Fantastic! 01:52:11 Gail Eagen: That was incredible! Thank you! 01:52:19 Denis Therrien: Wow!!! Thank you 01:52:26 KWG: WOW, thank you so much. Fantastic!, 01:52:29 Allison: Fantastic presentation. So interesting! 01:52:34 Tristan: Direct link to Saturn V Step by Step. https://www.nasa.gov/wp-content/uploads/static/history/afj/pdf/saturn-V-step-by-step.pdf 01:52:42 Bob G: remarkable presentation ! 01:53:03 Rosemary: Wonderful presentation - Many Thanks! 01:53:32 Bob Herres: That wasn't a Presentation It was an Adventure ๐Ÿ’—โœ… 01:53:48 Ed Morawski: Really, really good presentation! 01:54:00 Rosemary: Reacted to "That wasn't a Presen..." with ๐Ÿ‘ 01:54:11 Marilyn: Fascinating, so well-done! Thank you very much, Mark! 01:54:21 Bob Herres: "Blank the Screen, to get their Attention!" ๐Ÿ™‚Horrifying Thought! ๐Ÿš€ 01:54:35 mikev: Really Great, thanks Mark!! 01:55:17 Stew Bruce: Gee, you mean new technologies aren't perfect? :) 01:55:53 Michelle Faber: Thank you. Very interesting 01:56:46 Phil: My very first university computer course (1968) was based upon 2 digit verbs and nouns. Now, I finally understand why I was learning this technique. Thanks for a fabulous presentation! 01:57:11 Tom Trottier: Ancient photogs had props to keep heads still for multi-second photographs with the slow film 01:57:36 Tom Trottier: or rather, the slow glass plates with the emulsion coating.... 01:58:18 KWG: Blown away by these out-of-the box thinkers! 01:59:50 Jocelyn Doire: the 3 astronauts that burned were in what program, was it Gimini? 01:59:55 Tom Trottier: 66 years.... ah, progressssssss 02:00:21 Carol Pearson: very interesting, thank so mcuh 02:00:38 Tom Trottier: Did they consider giving the astronauts a Curta computer or slide rule for backup? 02:03:22 Coreen: Wonderful presentation! My family watched the first lunar landing! 02:03:50 Tom Trottier: SUPER! 02:03:53 Jocelyn Doire: can you go through what cause the error messages on apollo 11 02:06:07 Jocelyn Doire: great presentation!!! thanks. 02:06:09 Tristan: Guess Apollo 11 had a Blue Moon Screen. 02:06:12 Tom Trottier: Well done!