DATAMATH CALCULATOR MUSEUM
Canon Canola L1632
|Date of introduction:||1977||Display technology:||Fluorescent|
|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
• 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,
• Fluorescent 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.