Which calculators had no known bugs?

[PANAMATIK]

(08-05-2017 02:29 AM)rprosperi Wrote:  And it makes me wonder how long you searched before coming up with that reproducible sequence.

I found this sequence a few days after I got my HP-25 in 1976. I remember that I tried to perform all possible key combinations mentioned in the manual. And then made some more experiments.

There is another HP-25 bug: The non existent sequence g Sigma Plus can be programmed, shown correctly as 15 25. With help of a PC emulator I found that this step is executed same as NOP no operation. I'm sure this bug has been discovered many times before and perhaps never was mentioned because it is not very spectacular.

Bernhard