EMP (Electromagnetic Pulse) Sun Flares and HP's

[Bikeman]

If anything, some of the early HP computers and calculators would be less vulnerable to errors from radiation than modern computers because a) they use much larger structures in their chips and b) some of those products used a semiconductor process known as "Silicon-on-Sapphiire" https://en.wikipedia.org/wiki/Silicon_on_sapphire that is generally more resilient against radiation than modern CMOS alternatives.

See also https://www.hpmuseum.org/forum/archive/i...-5853.html

For a very deep dive into the subject: http://www.righto.com/2023/12/HP-silicon...-chip.html