A first section has been created, its part to EDSAC computer that was re-built and activated at The National Museum of Computing.

The Electronic Delay Storage Automatic Calculator was first run in 1949 and was created to help scientists at Cambridge University.

Because the components are rarely available and there are no detail documentation found it is make the job re-creating this machine becomes difficult.

“We do not have a blueprint to guide us in the re-built project, so in recreating the original EDSAC we should adopt the way of thinking in 1940s return to engineer and redesign the engine,” said Andrew Herbert, recreation business leaders.

Students who once worked with the creators of EDSAC has helped to guide the project, said Herbert.

“We face the same challenges as the creator of the machine, where they eventually managed to build a machine that is changing the way in computing.”

Mercury Tubes

Designed by Sir Maurice Wilkes, EDSAC was the first computer designed specifically to perform computing tasks. The original machine is uses 3,000 valves arranged in a series of shelves, and fill the floor space of 20 square meters.

This machine is being rebuilt in public in TNMOC during the official opening of the exhibition for the first time, EDSAC is activated. Another computing unit of the machine will be added and activated during the re-built work.

One element that will not be duplicated is the memory is used for the storage system. The original memory system is using a long tube of mercury, but modern health and safety rules do not allow its use in the museum. Finally, the makers use nickel as the component of the memory system, which is widely used in existing engines after EDSAC was made.

The work of re-building EDSAC scheduled to be completed by the end of 2015. Once completed, TNMOC said children who visit the museum will be able to write programs to run on the machine.

The project began in 2011 and was initially only involved 20 volunteer members, who only use original photographs to assist their work.

However, in June the original blueprint was found, and that are now used to check and guide the work of the team that re-built the EDSAC.

What old computer beside EDSAC that you know?