DATAMATH CALCULATOR MUSEUM
Toshiba LC-836MN MEMO NOTE 30
|Date of introduction:||1978||Display technology:||LCD (yellow)|
|New price:||Display size:||8|
|Size:||5.4" x 2.7" x 0.35"|
|Weight:||2.8 ounces||Serial No:||C54068|
|Batteries:||3*LR44||Date of manufacture:||year 1978|
|AC-Adapter:||Origin of manufacture:||Japan|
|Precision:||8||Integrated circuits:||Toshiba T3690, T3691|
|Program steps:||Courtesy of:||Joerg Woerner|
The Toshiba LC-836MN could be called the first portable electronic Databank. It was introduced already in the year 1978 and was 9 years ahead the first Mini Data Bank sold by Texas Instruments.
The LC-836MN uses an early chipset manufactured by Toshiba, Japan. The T3690 microcontroller scans the keyboard, drives the display and does the calculating functions. The T3691 stores a maximum of 30 information items in units of 6 alphabetical characters and 8 numerals each. If you add the bits together you end with a total amount of 2048 bits or 256 bytes.
products like the LC-840WA continued the approach of
small chipsets in calculator derived products.
The alphanumeric display uses an odd 8-segment layout with one additional segment to the standard calculator layout. The display on the left reads "MEMORY".
Radio Shack gave in their manual a lot of ideas what you can store in the 30 memory places:
name and telephone number
• Bank name and balance
• Person's name and date of birth
• Passport number, Cash card number, License number
• Caloric value of foods
• Various rate of money exchange
• Golf scores
• Key and Locker number
• Constants such as C = 2.997925, me = 9.1091, K = 1.38054
A similar product was sold by Radio Shack with the EC-4002. Later the LC-1038MN added an alarm clock. Japanese competitor Canon introduced a smaller Databank with the LC-MEMO in 1978, too.
Don't miss later Personal products like the Avigo, introduced 20 years later.
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© Joerg Woerner, July 3, 2002. No reprints without written permission.