Corvus 312

Date of introduction:  1974 Display technology:  LED-stick
New price:  $69.95 Display size:  8
Size:  6.0" x 3.0" x 1.4"    
Weight:  7.7 ounces Serial No:  312-0234468
Batteries:  4*AA NiCd Date of manufacture:  mth 03 year 1975
AC-Adapter:  A3310 6V DC, 100mA Origin of manufacture:  USA
Precision:  8 Integrated circuits:  Mostek MK5020A
Program steps:   Courtesy of:  Peter Muckermann
    Download manual:   (US: 2.0 MByte)

Corvus, the consumer division of the famous IC manufacturer MOSTEK, introduced with the Model 310 a basic four-function calculator with added square-root and percent keys.

Corvus_312_PCB.jpg (92327 Byte)The printed circuit board (PCB) of the Corvus 310 makes use of the MK5020A single-chip calculator circuit. We know the MK5020A, a clone of the Texas Instruments one-chip calculator circuit TMS0102. But these two lack the square-root key...
Learn more about Mostek Calculator Integrated Circuits.

Three different models were available:

Model 310: Includes four AA-sized batteries.
Model 311: Includes four AA-sized batteries and an AC adaptor for 115V.
Model 312: Includes rechargeable NiCd-batteries and an AC charger for 115V.

The Corvus 320 series removed the square-root function but added a full memory. Other calculators sold under the Corvus brand are the 400, 415, 500, and 615 models. Don't miss the colorful Corvus 804.

Don't miss the Magiclick 450, a perfect doublet of the Corvus calculator using a brain manufactured by Rockwell.

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If you have additions to the above article please email:

Joerg Woerner, October 17, 2002. No reprints without written permission.