DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
| This Concept 24 Version 3
was manufactured
in 1976 by an unknown company in Hong Kong.
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| The printed circuit board
(PCB) of the CONCEPT 24 Version 3 hides the name of its manufacturer.
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| The keyboard
assembly of the CONCEPT 24 Version 3 lists a company called ETCO but no further information.
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| The main electronics
of the CONCEPT 24 Version 3 calculator is centered around a Rockwell A5901CA Integrated Circuit.
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| The A5901CA
single-chip calculator circuit.
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If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, February 5, 2010. No reprints without written permission.
