Casio PRO fx-1

Date of introduction:  September 1977 Display technology:  Fluorescent
New price:   Display size:  10 (8 + 2)
Size:  7.7" x 4.5" x 1.4"
 196 x 115 x 35 mm3
Weight:  13.6 ounces, 386 grams Serial No:  6179316, 2253042
Batteries:  4*AA Date of manufacture:  mth 01 year 1978
AC-Adapter:  AD-4160 Origin of manufacture:  Japan
Precision:  10  Integrated circuits:  Hitachi HD36106, HD36136, HD36162, HD37603
Memories:  11    
Program steps:  127 Courtesy of:  Joerg Woerner

Casio Computer Co., Ltd introduced with the fx-10 its first scientific handheld calculator in May 1974, almost 2 years after the Mini CM-601.

It took more than three years before in September 1977 the PRO fx-1 their first and only hand-held programmable calculator with integrated magnetic card reader appeared on the market. Technically is the PRO fx-1 based on the fx-201P introduced already in 1976 and then competing with the SR-56.

Timing of the market launch of the PRO fx-1 was a disaster! While it could barely compete with the SR-52 introduced already in 1975, blew it the revolutionary TI-59 simply away.

Casio learned their lessons well and introduced within two years with the FX-501P and FX-502P their first keystroke Programmable Pocket Calculators with LC-Display and leading over FX-601P and FX-602P, introducing a dot matrix LC-Display, to the very successful FX-702P "Pocket Computer". 

Dismantling this Casio PRO fx-1 manufactured in January 1978 reveals an interesting design centered around multiple Integrated Circuits manufactured by Hitachi, Japan.


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Joerg Woerner, June 16, 2017. No reprints without written permission.