DATAMATH CALCULATOR MUSEUM
Canon Canola L1632
|Date of introduction:||1977||Display technology:||Flourescent|
|New price:||Display size:||16|
|Size:||11.4" x 10.2" x 3.8"|
|Weight:||4 pounds 9 ounces||Serial No:||301561|
|Batteries:||n.a.||Date of manufacture:||year 1977|
|AC-Adapter:||220V||Origin of manufacture:||Japan|
|Program steps:||Courtesy of:||Joerg Woerner|
a first glance the Canon Canola L1632 looks very common. We know the housing
Canola F-11 statistical desktop calculator introduced already in 1975.
A first calculation (the common square-root of 8) reveals a display with 16-digits of precision.
A deeper study of the keyboard gives 3 full memories ! Now we should think about this calculator. All known calculator architectures manufactured by Texas Instruments control a maximum of 12 digits (Canola L121F with TMS0201, TMS0302).
Dismantling the Canola L1632 is a simple but surprising job: A small single-chip microcomputer on a huge printed circuit board (PCB) surrounded by dozens of discrete components.
The single-chip microcomputer was manufactured by Texas Instruments and gives only two numbers:
|ZA0543: This is the ROM-code used with TMS1000 microcomputer family|
|KAP7706: The four digits define the week and year of manufacturing.|
Texas Instruments released between 1974 and 1978 about 10 different TMS1000 members. With only four pieces of information we are able to trace down to the exact type:
|16-digit display capacity, 40-pin housing: TMS12xx, TMS13xx, TMS16xx|
|Flourescent display: TMS127x, TMS137x, TMS167x|
|3 full memories plus about 4 working registers needs more than 112*4 bits of RAM: TMS130x, TMS160x|
|Manufactured in 1979: TMS1370.|
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© Joerg Woerner, July 22, 2002. No reprints without written permission.