Early computers: computosaurs
Just to discover some (very ?) old
create and debug computers, electronicians uses oscilloscopes.
have preserved one of these instruments since 46 years. I therefore
propose you to discover this ancestor of 1962 which was used in the
development of the ODP-505 described below. It is fully realized with
lamps and was manufactured in France. You can see many pictures,
technical notice very complete and all the schematics here: http://pichotjm.free.fr/Serel/Oscillo245A.html
Second generation computers
of the 2 french early computers Serel
Ge transistors and core memory (ca 1960)
The small computer ODP-505
has beeen restored.
Have a look here: ODP-505
find in this section, a full description
of the 1969-1973 production of an electronic company,
specialized in new
technologies. The described techniques correspond to
the period of changeover of
transistors to simple integrated circuits. Of course the cameras are
built with vacuum tubes!
It's really impressive to
see! Note the size of the
card by comparing it to that of a hand. I have made these pictures from
Notice the color of the wires. You can
some destroyed or absent cores ... and dust!
I did not clean up the memory due to the fear of damaging it.
Otherwise, the pictures of core memory of the ODP-505 can be
(this is a whole configuration memory, with its
I am writting a new section about core memories... this will
several months... More than 500 pictures!
You can have a look at http://pichotjm.free.fr/MemTores/MemTores.html
Third generation computers
(Small IC: SSI, MSI)
of an alphanumeric display terminal using TV delay lines
memory Have a look there: http://pichotjm.free.fr/DisplayDL/DisplayDLus.html
was used with the Multi8 and
original photos of
screens, displays, alpha-numeric consols, monitors,
keyboards, and application screen shots. There are also 8 Soviet or
american satellites, avionics, radar displays, monoscopes, dual beam
(ca 1973, 16
Sorry, in french.
(ca 1972, 8 bit machine)
addition to computers, there were displays, TV image
propose you to have a look at a complete catalogue on such devices. You
can find some additional explanations on display techniques described
(ICs, LSI, uP)
Not too old!...
- A complete main board with Beryllium
(early 1975, TR/TT100-DCO machine)
DCO Application (data com with modem 75/300 bauds)
Have a look at
Main board Beryllium. The Beryllium chipset (3 white square
chips) was designed by Burroughs Seneffe plant (Belgium) (?)
The TR/TT100 and TT102-DCO were designed by Burroughs Villers-Ecalles
Apple II. In this section, you will
find a lot of original documents (product
sheets in french, prototyping board specifications, ...) and many
pictures of a clone built around Elac B mother board (to be process!
You have to wait, sorry!) Have a look at: Apple
II section. (in French)
the futur... you can expect
system for 6800/6301/6809 microcomputers, with a needle printer, tape
reader/writter and 8" floppies (1978) wrapping technology, cmos
memories with retention...
- A clone of an Apple II
with 5"1/4 modified floppies.
- A programmable serial
calculator with magnetic cards B7400 (clone of a prototype, Bourbon
Chipset, but only if I find it! ca 1974) Serial CPU.
- An analog computer to
determine timings and paper grades to be used in photography.(1974)
- A real time emulator of
the 6301 uP.
- And so on...
I have prepared a short list of very old machines that have
over the world. I will update this list based on my walks on the net.
This will place a machine compared to the march of time. [sorry text in
French, but machine names and links lead to many English URL]
List of museums
sites, by country, by technologies, old or
exotic, brands, models, history and chronology ...
For some time, I
collect links to sites describing computosaurs, in France, or
in foreign countries
including some fairly exotic ... (Russia, for example, Brazil ...)
entire section focuses on the technologies used by computers:
It speaks about
memories using acoustic wires, mercury, TV delay line, lamps, magnetic
bubbles, ternary logic, ...
normally what you salivate ... and lose a few hours in front of your
A recommended suggestion about vacuum tubes: see the
collection of B
Loquen (fabulous!) And the
other guy that makes even his lamps! (video Claude Perrier)
- Description of a Pong
game done with a specialized IC by TI (Without the use of
here a double beam
If you like
my web site, leave me a message... precise your country.
months, i was fed up by old computers... ;-) So I prepare lot of
pictures about chinese minorities and a follow-up of the trip around
the World of my Son Renaud.
photos of the Yunnan
Be carefull! You will find a lot of portraits of chinese
minorities and giant panoramics.
around the World
of my son Renaud (starting may 2009, ending december 2010). Thousands
pictures (and his famous crocodile) and more than 500
Europe, North Europe, Australia, Chile, Argentine, Brasil, USA,
(Renaud is graduate in IT, and will reach USA in
march, april 2010... He will look for a job... He worked several years
as IBMer )
To contact me: pichotjm(at)free.fr
but replace (at) by @ in the eMail adress
rev 2007-06-19 (IBM650) rev 2007-07-01 (T1600)
rev 2007-10-09 (ascii art)
rev 2007-11-12 Similar to french version rev 2007-10-10 à
(text 4th generation, Beryllium, misc stufs)
rev 2008-01-15 (Display tech 1973) 2008-03-30 Display with
DL 2008-06-20 Add icones
links modified, 2009-01-23 Vacuum tube technology