• Source: Darmstadt Electronic Computing Machine (DERA)

The Darmstadt Electronic Computing Machine (DERA), (German:Darmstädter Elektronischer Rechenautomat) was an experimental, room-sized electronic computer calculator with vacuum tube built in 1951. It was built at the Technische Universität Darmstadt under the direction of Alwin Walther. The first operation was in 1957, with development completed in 1959.




Technical data


Start of construction in 1950/51, start of use in 1957, completed in 1959
Programming languages: in addition to machine code also ALGOL.
I / O device: telegraph (paper tape reader).
Word machine with George Stibitz, from George Stibitz (also excess - 3 code), 20 bit (13 decimal places + sign)
Command length 7 digits
Drum memory with 3000 words
Ferrite core register (20 ms access time)
Clock frequency 200 kHz (addition 0.8 ms; multiplication 12 - 16 ms)
Components: 1,400 tubes, 8,000 diodes, 90 relays




See also


CAB 500
Carousel memory (magnetic rolls)
Karlqvist gap
Manchester Mark 1




References






External links


Youtube of the Darmstadt Electronic Computing Machine (DERA) - Documentary from 1963
Librascope LGP-30: The drum memory computer referenced in the above story, also referenced on Librascope LGP-30.
Librascope RPC-4000: Drum memory computer referenced in the above story
Oral history interview with Dean Babcock

Kata Kunci Pencarian:

• Darmstadt Electronic Computing Machine (DERA)
• Department of Computer Science of TU Darmstadt
• List of vacuum-tube computers
• Alwin Walther