DATAMATH CALCULATOR MUSEUM
|Date of introduction:||November 1981||Display technology:|
|New price:||$109.00 (MSRP 1981)||Display size:|
|Size:|| 3.2" x 6.2" x 1.75"
82 x 158 x 44 mm3
|Printer technology:||Electrostatic (Spark)|
|Weight:||9.8 ounces, 278 grams||Serial No:||1B111A|
|Batteries:||4*AA Alkaline or NP-4M NiCd||Date of manufacture:||mth 11 year 1981|
|AC-Adapter:||AD-4150 (4.5V DC, 500mA)||Origin of manufacture:||Japan|
|Precision:||Integrated circuits:||CPU: HD43192A01|
|Program steps:||Courtesy of:||Joerg Woerner|
Sharp Corporation introduced in June 1980 with the PC-1210 (and its sibling PC-1211) the World's first Pocket Computer with BASIC programmability. It took only about three months and Matsushita defined with their Panasonic HHC a new category of Hand-held Computers or Portable Computers. Main competitor in Japan, Casio Computer Co., Ltd, on the other hand introduced with the FX-501P and FX-502P in October 1979 their first keystroke Programmable Pocket Calculator with LC-Display, succeeded in March 1981 with the FX-601P and FX-602P, introducing a dot matrix LC-Display and laying the foundation for the FX-702P "Pocket Computer". Casio took a different approach than Sharp and added BASIC programmability to a Scientific Calculator and labeled the device with "Programmable Calculator" accordingly. Casio's early advertisement featuring the FX-702P used often a big headline "More Power To Your Pocket" to challenge rival Sharp.
The FX-702P Programmable Calculators features not only an internal expansion slot for a memory cartridge but a 7-pin connector for peripherals on its left side:
(Fits FX-501P/FX-502P/FX-601P/FX-602P, too)
|FP-10||Mini Printer, electro-sensitive FP-36 paper, up to
20 characters per line, 2 lines per second
(Fits FX-601P/FX-602P, too)
|(not released)||4k Bytes RAM module with backup battery|
|(not released)||8k Bytes RAM module with backup battery|
Dismantling the featured Casio FP-10 manufactured in
November 1981 by Casio Computers in Japan reveals a complex design based on two printed circuit boards (PCBs)
in a clamshell packaging and powered by four AA-sized Alkaline batteries.
One of the PCBs holds the power electronics for the electrostatic printer while the other PCB provides the brain of the Mini Printer:
|• HD43192A01: 4-bit
microcontroller with integrated RAM and ROM and printer driver for 8
by Hitachi in a CMOS process and using an 80-pin QFP (Quad Flat Pack) package
Consolidating the part numbers of the microcontrollers and display controllers, and printer controllers located in the FX-702P BASIC Programmable Calculator, the FX-602P keystroke Programmable Calculators, and the FP-10 Mini Printer, respectively proves their close relationship:
|• FX-602P: HD43190A01, HD43191A01
• FX-702P: HD43190A02, D43190A03, HD43191A02, HD43191A03
• FP-10: HD43192A01
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© Joerg Woerner, January 5, 2021. No reprints without written permission.