The Story of My Life so Far - Part 54 - Computer Officer on the Corvette Georges Leygues

in story •  last year

This is the story of my life so far: 68 years and counting.
Prequel: A Brief History of my Family in France



The story starts here
Previous episode: Part 53


Computer Officer on the Georges Leygues

When I arrived in Brest in September 1976 to become the computer officer (officier calcul) on the Georges Leygues, the ship was still in dry dock. The Brest arsenal was still responsible for the ship and the crew would not inhabit the ship before June 1977.

My job and the job of the petty officers of my team was to follow the installation of the computer system and to check that all the prescribed tests were successful.

There were two rooms for the two computers

  • the main computer center with the central computer, the P2MS
  • the computer annex, near the Combat Information Center (CIC), with the visualization computer, the Mitra 15.

These two computers were connected by a high speed cable using some non standard transmission protocol.

The visualization computer was connected to seven consoles in the CIC.

Most of the processing power was in the central computer. The visualization computer was just to capture the inputs from the consoles and to distribute the video, real and synthetic, to the consoles. Everything else was done in the central computer.

I have no pictures of the computers and of the CIC, as I was not able to find anything on the Internet.


GL-a-quai.jpg
source

The central computer, the P2MS, a military version of the Iris 50, had a magnetic-core memory. I don't remember exactly the capacity of this central memory, but I believe it was 256 kilo Bytes. It was certainly less than one Mega Byte.

In addition, there was a magnetic disk, controlled by a small Mitra 15 computer, with a capacity of several Mega Bytes. This disk had no moving head, but one head per track; I believe there were 128 tracks, so 128 heads.

This design had two advantages:

  • the mean time to access data on disk was only half the time of a disk revolution, so it was very fast.
  • vibrations would have probably damaged a moving head and render the system unable to work.

There were not much redundancy in the whole computer system. One central computer with one fast disk, one visualization computer. If any of these was failing, the system stopped working, so all these needed to be highly reliable.


GL-chesapeake.jpg
source

The computer specialists in my team were three petty officers. Unfortunately I don't remember their names.
Before arriving in Brest in September 1976, I already knew them, as I had been instructed with them at the CPM in Paris in 1975.

They were spending most of their time in the two computer rooms, with the workers from the arsenal that were installing the computer system.

I was also visiting the main computer room several times a day. I did not really needed to do that, but computers already fascinated me and I wanted to learn as much as possible how to operate them, so that I would be able to write a computer game that would run on the consoles in the CIC.

Continue to Part 55


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Summary
Part 1 - Part 2 - Part 3 - Part 4 - Part 5 - Part 6 - Part 7 - Part 8
Part 9 - Part 10 - Part 11 - Part 12 - Part 13 - Part 14 - Part 15 - Part 16
Part 17 - Part 18 - Part 19 - Part 20 - Part 21 - Part 22 - Part 23 - Part 24
Part 25 - Part 26 - Part 27 - Part 28 - Part 29 - Part 30 - Part 31 - Part 32
Part 33 - Part 34 - Part 35 - Part 36 - Part 37 - Part 38 - Part 39 - Part 40
Part 41 - Part 42 - Part 43 - Part 44 - Part 45 - Part 46 - Part 47 - Part 48
Part 49 - Part 50 - Part 51 - Part 52 - Part 53



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You are a computer geek since I was on diaper (couchette).When you mention the capacity of the memory, it is a laughing matter now but then
I guess there was not much to put on the disk to need more space.
Keep on steemin'

That is an admirable reason to want to learn as much as possible about them. It was wanting to write a computer game that first made me interested in computers!

Amazing specs of those computers lol. It is really amazing how fast the technology works. I remember running to the university 3 times in 1998 to download and bring warcraft game on a bunch of floppy drives 1.4Mb each. The game itself was something like 36 megabytes :) Now one photo on my SD card takes up more space than that :)

Great writing! I started to write about my life story as well and I hope you will consider to follow me. @xqcai

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I started to write about my life story as well

Indeed, the story of your life seems very interesting. I will try to read it from the beginning.

I hope you will consider to follow me.

No, sorry, I will not follow you. I have decided from the start to never follow more than 50 Steemians and I am currently at 50.

There is no point to follow too many people, as you cannot really read all their posts. 50 is already a lot.

The good old days when you needed an entire room for each computer! I would probably spend most of my time in the main computer room as well. When you are at sea for that long amount time, having access to such an advanced piece of technology would be the most interesting way to spend time.

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When you are at sea for that long amount time, having access to such an advanced piece of technology would be the most interesting way to spend time.

At sea, the computer is working for the ship, so there is nothing really to do in the main computer room, except to see if everything is working OK.

a very good job my friend.

that's interesting, was the computer for targeting or for navigation or what?

great story

I think am going to join the navy

Nice story :)

You are very senior in technology than me. Respect for you.

Congratulations and success good luck like you

Great story, nice writing!

fascinante tu historia amigo, y me llama mucho el hermetismo que tiene el gobierno de los equipos que no hay ni siquiera imágenes en google

Great Inspiration. To have u as Mentor can NOT be measured with money. To learn from u is priceless.

excellent story

Hahaha , the world has now advance in Computer technology , High CPU , high memories not luje those days.

Thanks for this amazing your computer....i like this post....

nice story
nice writing.....
carry on i am appreciated by this post

I love your post and post you very good friend thanks for sharing interesting things

Amazing post, it's interesting to know this kind of things that the people don't know

I have always said that people who are inclined to study computers are very intelligent, there is the result. A seguir...

nice to know you @vcelier .. I followed you! I'm from philippines.. I hope we can be friends in here :) You have a great job before..

long journey, of life and may be an inspiration for me, and I like your posts and thank you for sharing your story with us

That was a fascinating read, than you for sharing. The stories about you and your family's past are always a great read. Thank you for taking the time to write in English, too! :)

encore un excellent chapitre Monsieur!

Outstanding story. Congratulations as a successful Computer Officer. Follow and upvoted you.

Hi vcelier,
What a good idea to include your life story on the steemit blockchain. This way, it will remain immutable and will exist as long as the steemit blockchain exists!
It is very impressive that you were working with computers long before I was even alive!
Keep on writing!
CU, Chris aka smallstepschange
P.S.: I found to your profile because you gave me an upvote on my intro post. Many thanks for this!

Did you inhabit this ship after June '77?