DATAMATH CALCULATOR MUSEUM |
Canon F-2
Date of introduction: | 1975 | Display technology: | Fluorescent |
New price: | Display size: | 7 + 2 | |
Size: | 6.3" x 3.2" x 1.25" | ||
Weight: | 7.9 ounces | Serial No: | 300966 |
Batteries: | 3*AA | Date of manufacture: | year 1975 |
AC-Adapter: | AD-1 | Origin of manufacture: | Japan |
Precision: | 7 | Integrated circuits: | ZA0535 |
Memories: | |||
Program steps: | Courtesy of: | Joerg Woerner |
On a first glance the Palmtronic F-2 could be called a scientifical calculator. You'll easily notice keys like a^{x}, log or D»R and even EXP to enter the exponent of a number. Using the calculator is quite funny: The display is always in a mode with 7 digits of mantissa and 2 digits of exponent and the 7 digits define the precision of the calculator.
Even a simple operation like the square root of 9 takes a
whooping 4 seconds and ends in a display of 2.99998
00 ! Funny to tell that the leftmost digit of the display counts
some numbers during calculation time.
Immediately a second question will arise: 3^{2}= ? Entering the numerals
and instructions is funny:
Key | Display | |
[CL] | 0. 00 | |
[3] | 3. 00 | |
[a^{x}] | .477124 00 | |
[2] | 2. 00 | |
[=] | 9.00009 00 |
A deeper exploration of the keyboard gives some other mismatches like a missing memory and the trigonometric functions without their inverse counterpart. The internal construction shows a LSI MOS chip of the TMS1000 family similar to the one in the Texas Instruments SR-16. But the algorithms seem to be much less perfect, we know similar performance from the F-7.
Even Texas Instruments failed with some algorithm, don't miss the rare SR-40 prototype.
The same housing was used with the F-6
in Canon's scientific calculator line and the Palmtronic LD-10M
basic calculator.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, July 2, 2002. No reprints without written permission.