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Sharp Compet 32 (CS-32) Desktop Calculator

Sharp Compet 32 (Model CS-32A)

The Sharp Compet 32 is a follow-on machine to Sharp's first electronic calculator to utilize early bipolar integrated circuits, the Sharp Compet 31 (CS-31A). The Compet 32 adds a two-key square root function, and an additional accumulating memory register to the capabilities of the Compet 31. The CS-32A has a capacity of 16 digits, clearly displayed on its multiplexed Nixie tube display. It uses fixed or floating decimal logic, with a knob on the keyboard panel to select the decimal point location, with selections for truncation and rounding operation, and for full floating decimal. The machine uses a single type of early bipolar TTL integrated circuit (made by Mitsubishi), a Quad 2-Input NAND gate (used with negative logic as NOR gate), and large number of discrete transistors and diodes, and a small magnetic core memory array (18 x 16) for storage of working registers (Four 18-digit registers; input register[X], operand register[Y], Memory 1 and Memory 2).
Sharp Compet 32 Specifications

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Manufacturer: Hayakawa Electric Co., Ltd. (Sharp)
Model Number: CS-32A (Compet 32)
Manufactured In: Japan
Date of Introduction: 1966
Display Technology: Nixie Tube, 16 Digits, Multiplexed
Logic Technology: Mix of early TTL small-scale IC's and discrete diode/transistor logic
22 Mitsubishi M2340 TTL Quad 2-In NAND gate IC's, 317 Transistors, 1200 Diodes
Small magnetic core memory array (18x16, 288 bits) for working register storage
Digits of Capacity: 16
Decimal Modes: Floating or fixed at rotary switch-selectable locations
Math Functions: Four Function plus two-key Square Root
Memories: Two accumulator-style memory registers
Clock Frequency: 100 KHz
Performance: Addition/Subtraction: 28ms; Multiplication: 325ms
Division: 335ms; Square Root: 320ms
Size: 12 1/4" wide, 16" deep, 4 1/2" high
Weight: 14.5 pounds
Power consumption: 20 Watts

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Copyright 1997-2007, Rick Bensene.