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Toshiba BC-8018B (Version 1)

Date of introduction:  1978 Display technology:  Fluorescent
New price:   Display size:  8
Size:  5.6" x 3.0" x 0.8"
 142 x 75 x 20 mm3
   
Weight:  4.0 ounces, 112 grams Serial No:  D 22618
Batteries:  2*AA Date of manufacture:  year 1978
AC-Adapter:  BH-115 (110V) or
 BH-116 (220V)
Origin of manufacture:  Taiwan
Precision:  8 Integrated circuits:  Sharp LI2017
Memories:   Displays:  Futaba 9-ST-08A
Program steps:   Courtesy of:  Joerg Woerner

Production of the original Toshiba BC-8018 and BC-8111 was transitioned in Fall 1978 from Japan to Taiwan and the calculators renamed to BC-8018B an BC-8111B.

Dismantling the featured BC-8018B (Version 1) calculator manufactured in 1978 by Zeny Corporation in Taiwan reveals a very cost effective design using a single-sided printed circuit board (PCB) centered around a Sharp LI2017 single-chip calculator circuit connected to a 9-digit Vacuum Fluorescent Display (VFD), a keyboard assembly and powered by 2 AA-sized alkaline batteries.

The Sharp LI2017 chip was introduced in 1976 seems to be from a technology point of view slightly ahead of the TMS1070 used with other Toshiba calculators like the BC-1015 and integrated already the "pull down" resistors needed to bias the anodes and grids of the display with respect to the filament. Texas Instruments caught up with the introduction of the TMS1040 Product Family and the Toshiba BC-8018B (Version 2) calculator switched its internals to a TMS1045 single-chip calculator circuit and consequently replaced the two [C] and [CE] keys with a combined [C/CE] key.

 



If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, January 9, 2023. No reprints without written permission.