On Tue, 25 Aug 2026, Julia Menden wrote:
? Ferrite core memory from a DVA 2002
By the way, DVA just means Datenverarbeitungsanlage, i.e. data processing
system.
? Memory capacity: 80 × 14 bits
Sound more like a core memory plane of a calculator.
The Siemens 2002 was a decimal system with a word size of 12 decimals. One
decimal was usually coded as four binary bits as dual or gray code. I
guess the word size was 48 or more bits (you also had a sign).
14 bits is just weird and doesn't match the system. Unfortunately, there
are no technical documents online that could describe the architecture of
the 2002.
? According to the contemporary description: approximately 840 characters
A character needs much more than one single bit.
The core matrices, wiring and contacts are clearly visible, and the
historical documentation accompanying it has also survived.
Do you have documentation of the Siemens 2002? Our computer museum in
Stuttgart would be interested. We have many modules from a 2002
originating from the 2002 system in Kiel that they scrapped years ago.
Therefore, I am inviting serious offers rather than setting a fixed
price at this stage.
The only offer I can make is to put it on display in our museum.
Christian
