DATAMATH CALCULATOR MUSEUM
|Date of introduction:||1973||Display technology:||Panaplex II|
|New price:||Display size:||10|
|Size:||8.5" x 6.5" x 2.2"|
|Weight:||1 pound 9 ounces||Serial No:||305-103660|
|Batteries:||Date of manufacture:||mth 08 year 1973|
|AC-Adapter:||115 V||Origin of manufacture:||USA|
|Precision:||10||Integrated circuits:||Mostek MK6092P (7335) MK5017|
|Program steps:||Courtesy of:||Joerg Woerner|
Corvus, the consumer division of the famous IC manufacturer MOSTEK, introduced with the Model 300E their first desktop four-function calculator. This unique Model 305 added a clock with calendar function, we know a similar approach from the Texas Instruments TI-3510 and the Garrett 2002.
the calculator reveals a small surprise. The printed circuit board (PCB) is
identical with the Corvus 300E and an additional clock module is located piggy
back on the main board.
Learn more about Mostek Calculator Integrated Circuits.
The back side of the calculator gives immediately an explanation of the two mystery holes and the small slit noticed already in the PCB of the Corvus 300E. They occupy the push buttons to adjust the clock and calendar plus a selector switch.
A small switch located near the [=] key selects between the calculator and clock mode:
Normal calculator function known from the 300E.
CLK-Position Reads the time in hours, minutes and seconds.
Every 10 seconds Reads the date in month and day for 3 seconds.
Three different desktop calculators were available from Corvus:
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, March 23, 2003. No reprints without written permission.