Curious Marc:

Marc Verdiel a fait ses études en France (il doit être Français ou Belge), X , puis une thèse en optronique à Orsay puis MIT il me semble avant de monter plusieurs sociétés dans la silicon valley puis rachat par Intel, il est maintenant Fellow Intel, ça lui laisse apparemment du temps et un peu d'argent.. il suffit de regarder son labo. Bref, ce qu'il fait et montre est passionnant !  Christophe F5HRS


The Computer History Museum, Mountain View, Calfornia US



Apollo Guidance Computer (Curious Marc)

L'ordinateur de guidage d'Apollo 11




  • AGC Part 1:   Restoring the computer that put man on the Moon
    We embark on the restoration of a very rare and historically significant machine: the Apollo Guidance Computer, or AGC. It was the revolutionary MIT-designed computer aboard Apollo that brought man on the Moon (and back!). Mike Stewart, space engineer extraordinaire and living AGC encyclopedia, spearheads this restoration effort. In this first episode, we setup a makeshift lab in his hotel room, somewhere in Houston. The computer belongs to a delightful private collector, Jimmie Loocke, who has generously allowed us to dive in the guts of his precious machine, with the hope of restoring it to full functionality by July 2019, the anniversary of the Apollo 11 Moon Landing.

  • AGC Part 2:   Power supplies test
    Mike Stewart gives an overview of the hardware. Enamored by the success at checking the IC gates, we proceed to check out and power up the supplies. Once again a long-ish video, but I hesitate to chop it up too much for fear of losing details that might be important to some. Let me know how I am doing.

  • AGC Part 3:   Main bus B undervolt
    In preparation for the AGC power up, we test the alarm module B8, simulate the Apollo 13 main bus undervolt, and discover that our memory is faulty. And we find out how much our AGC did originally cost.

  • AGC Part 4:   We are "go" for powerup
    The last module has checked out OK. It's time to attempt powering up the AGC - and see if it awakens from its 43+ years of slumber, even without proper working memory.

  • AGC Part 4,5: Bonus material, full logic analyzer trace explanation outcut
    Some inquisitive minds requested a non-edited version of the hard core read-back of the LA trace we obtained in episode 4. Your wish is hereby granted. It's actually quite interesting, provided you are a curious minded enginerd and dedicated follower of this restoration. Normal folks, move right along. Oh, wait, are there any of these left on my channel? Anyhow, I am curious (it's in my name) to see how popular this video is going to be. Frequent comment answers: Yes we know about Francois Rautenbach and the Block I core ropes ( These ropes are also from Jimmie and not compatible with our Block II computer Yes we are in contact with Fran (and several others) about their superb DSKYs replicas.

  • AGC Part 5:   We run a chunk of original Apollo code
    We are out of time for our first visit, and memory is not working. But our whiz kid Mike manages to whip up an FPGA memory emulator for the AGC just before we have to leave. The AGC gets to run a chunk of an original Apollo program!

  • AGC Part 6:   Restauration update, a new sponsor, and a satellite launch
    An update on the work with the DKSY, the rope memory simulator, the core memory, and Mike's satellite launch!

  • AGC Part 7:   Erasable memory module B12
    Our core memory module has a fault. We deep dive into its construction and make several measurements to find where the problem is. It will be helpful to first watch my core memory video: . This blog article from Ken Shirriff goes into even more details about the AGC core memory:

  • AGC Part 8:   A blinkenlight AGC
    In this update, Mike reveals the hidden Blinkenlights of the AGC.

  • AGC Part 9:   Unboxing my Apollo IRIG Gyroscope
    I just scored a genuine Apollo IRIG II gyroscope at the latest RR auction! Let's unbox it, after taking a quick look at more "mundane" military gyros from Ed's collection. In this session we step away from the guidance computer proper and look at its main input sensor, the Inertial Measurement Unit (IMU). I had resigned myself to use a lesser gyro with the Apollo servo electronics Jimmie had donated to the project. Well, no more, now we can use the real thing.

  • AGC Part 10: Mike flies Apollo 11 P63, lunar landing, on his hardware replica
    Mike Stewart flies Apollo 11 P63, lunar landing, using his new AGC monitor and his gate-exact AGC replicas. The AGC monitor replica, a key piece of AGC ground test equipment used by MIT for debugging the AGC, has been built in preparation for our upcoming next encounter with the real AGC.

  • AGC Part 21: Playing moon landing on our restored Apollo Guidance Computer
    We play moon landing on the real AGC



IBM 1401 computer  (Curious Marc)

  • The vintage IBM 1401 mainframe paying a tribute to Apollo 11


  • The 1959 IBM 1401 compiles and runs Fortran II
    We attempt to compile and run a simple FORTRAN program on our vintage 1959 IBM mainframe computer at the Computer History Museum. FORTRAN is a big stretch for this business oriented machine, with 16k memory and a CPU not meant at all for scientific applications. Even integer

  • The IBM 1401 mainframeruns"Edith"
    This politically incorrect one is going to lose me the precious few female followers left on my channel. But for the good of academic research, we were asked to run the program "Edith" on the vintage 1959 IBM mainframe at the computer history museum. Which goes on to prove that the more technology evolves, the more things stay the same. And I forgot how to pronounce the alphabet in German.

  • 1401 demonstration, Computer  History Museum, 14 octobre 2015
    Ken Ross and Paul Laughton demo the IBM 1401 at the Computer History Museum in Mt. View, California


General Automation Anaheim, California


Computer à relais japonais (Curious Marc)

  • 1958 Facom 128B japanese relay computer, still working
    This FACOM 128B was designed in 1958 and built in 1959, and is part of Fujitsu's (and Japan's) first commercial computers series. It uses over 5,000 relays, and still works to this day! Samtec and Fujitsu arranged for me to see this very special machine in action during a recent visit to Japan.



Systèmes allemands de 39-45




Emetteur pour sous-marins