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Ricoh Ricomac 1200 Desktop Calculator
Image Courtesy Martin Willemsen
The Ricoh Ricomac 1200 is an OEM version of the Unicom 1200, manufactured
by the Unicom business unit of AMI (American Microsystems), and sold under
the Ricoh brand name. Unicom served as an OEM manufacturer for a number
of different calculator companies that sold the machines under their own names,
including Ricoh, Commodore, and perhaps others. Subtle variances in cabinet
and keyboard color schemes were used to differentiate the models marketed
by different OEM customers. This calculator was also
marketed by Commodore as an OEM customer of Unicom, as the Commodore
412F. The machine was introduced sometime in 1970.
The 1200 is a basic four-function calculator, twelve-digits, fixed decimal,
with constant and round-off feature. Electronically, the machine uses an
AMI-made LSI chipset, individual tube vacuum-fluorescent display technology,
and discrete transistor display drivers. The machine is related
to another calculator in the museum, the
Commodore C112, a
slightly later-version of a Unicom-manufactured machine marketed by Commodore.
Copyright ©1997-2021, Rick Bensene.