Corvus 322

Date of introduction:  July 1974 Display technology:  LED-modules
New price:  $79.95 Display size:  8
Size:  6.0" x 3.0" x 1.4"    
Weight:  4.9 ounces Serial No:  322-173570
Batteries:  4*AA cells Date of manufacture:  mth 01 year 1975
AC-Adapter:  A3310 6V DC, 100mA Origin of manufacture:  USA
Precision:  8 Integrated circuits:  Mostek MK5022A
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 2.7 MByte)

Corvus, the consumer division of the famous IC manufacturer MOSTEK, introduced with the Model 322 a basic four-function calculator with full memory. 

Corvus_322_PCB.jpg (185223 Byte)The printed circuit board (PCB) of the Corvus 322 makes use of the MK5022A single-chip calculator circuit. We know the MK5020A, a clone of the Texas Instruments one-chip calculator circuit TMS0102. But this one lacked the memory. Learn more about Mostek Calculator Integrated Circuits.

Three different models were available:

Model 320: Includes four AA-sized batteries.
Model 321: Includes four AA-sized batteries and an AC adaptor for 115V.
Model 322: Includes rechargable NiCd-batteries and an AC charger for 115V.

The Corvus 310 series removed the memory but added the square-root function. 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, September 19, 2002. No reprints without written permission.