Which calculators had no known bugs?

[Sylvain Cote]

(11-13-2017 07:37 PM)Thomas Okken Wrote:  I think he meant: fill program memory with numbers (0-9).
It sounds like the 29C will keep running when you try to interrupt a program that is in number entry mode, and only stop once it reaches a non-number instruction.
Sounds like a good feature, and it anticipates the single-line non-interruptible numbers in the 41C.

Bernhard & Thomas,
Now I sees it, I fill-up the memory with 1, started the program and there you go, not interruptible without using the on/off switch.
Great find Bernhard!
Sylvain