Sanyo CZ-2901

Serial number 7003232S. made in Osaka, Japan
Accessories "SERD" 200V AC power supply
Condition Average. There are some serious scratches on the alu front cover and some of the digits printed on the display cover have faded a bit.
Repairs, Comments
Acquired 8.12.2003
Type, Precision, Input mode Scientific, 12 BCD digits, exponent 99, Reverse Polish Notation
Programmable No
Memory 10 storage registers (0-9, 0 is last-X, 7 is summation count, 8 is sum of squares, 9 sum of values), not permanent
Display 14 digit 7 segment green LED
Special features Instructions on the back, 4-level stack which behaves like in HP calculators, unit conversions, a large number of functions thanks to the INV and HYP keys.
Original Pricing, Production The Calculator Forensics indicate a Mostec chip, see below. According to Datamath this chip was introduced 1975 so this calculator must have been introduced towards the end of the seventies.
Batteries Built-in rechargeable battery pack. External SERD power supply or DC 6V off-the-shelf power supply (minus on center).
Dimensions Length 15.9cm, Width 8.6cm, Height 4.2cm
Comment F DSP n selects display precision. F SCI selects exponential notation, INV F SCI selects fix-point notation with 12 digits of precision, INV SUM+ is equivalent to SUM-.
Calculator forensics8.99999614252. This indicates a Mostek MK50075, 50103, 50104 chipset.
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