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