DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Canon CB-8 Checkbook
| Date of introduction: | 1983 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 2.8" x
6.0" x 0.3" 70 x 152 x 7 mm3 |
||
| Weight: | 2.4 ounces, 69 grams | Serial No: | |
| Batteries: | CR2025 | Date of manufacture: | year 1984 |
| AC-Adapter: | Origin of manufacture: | Japan | |
| Precision: | 8 | Integrated circuits: | NEC uPD1833G |
| Memories: | 3 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
The
first Canon Checkbook calculator was introduced in 1982 - about
three years after National Semiconductor's
NS103 started the idea of an Account Manager - and outdated Texas Instruments' TI-2200
by a few weeks. A
less powerful version with only one memory was sold as Checkbook
Junior.
This Canon CB-8 Checkbook calculator sold in Europe uses the housing of the original
Checkbook but added a red [A↔F] key to toggle between two entry modes:
| • Indicator (--) Floating decimal with manual insertion of the decimal using the [.] key • Indicator (AM) Add mode with the decimal automatically put in the dollars and cents position (0.00) |
Dismantling
this CB-8 Checkbook calculator manufactured in 1984 in Japan reveals a very solid
construction centered around a NEC uPD1833G single-chip calculator circuit and
it seems to be 100% identical with the Checkbook.
Don't miss the Corvus CheckMaster
introduced by MOSTEK already in 1975. This rare product retains the balance of
your memory even when shut off but uses power-hungry electronics.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, November 22, 2019. No reprints without written permission.