DATAMATH CALCULATOR MUSEUM
|Date of introduction:||year 1977||Display technology:||Fluorescent|
|New price:||Display size:||8 + 2|
|Size:||5.9" x 3.2" x 1.1"|
|Weight:||6.2 ounces||Serial No:||836290|
|Batteries:||4*AA||Date of manufacture:||year 1977|
|AC-Adapter:||Origin of manufacture:||Japan|
|Precision:||8||Integrated circuits:||NEC uPD955C|
|Program steps:||Courtesy of:||Joerg Woerner|
The Palmtronic F-61 is another calculator manufactured by Canon missing a calculator chip from Texas Instruments. The brain of the F-61 is a NEC uPD955C chip, obviously an enhanced version of the uPD951C found in the F-51.
Running Mike Sebastian's "Calculator forensics" gives an unacceptable bad result of 9.2079408 instead the expected value close to 9.0000. This places the F-61 in the league of boring calculators like the Canon F-6 (12.199423) and Rockwell 61R (10.4328).
The other calculators in the early scientific line are the F-31, F-41, F-51 and the F-71.
Within one year Canon introduced much sleeker calculators with
LC-Displays, don't miss the F-52 and F-62
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, March 27, 2003. No reprints without written permission.