35S Insanity

[Commie]

(11-30-2024 08:01 PM)Steve Simpkin Wrote:  

(11-30-2024 04:55 PM)naddy Wrote:  ...Is it possible that they didn't have/couldn't use the source code and re-implemented everything from scratch, modeled on the 32SII?

Yes, that is exactly what happened.

Hi guys,

I just want to point out how difficult it is to design a calculator from scratch, bug free, it's almost impossible. Just as you find and fix one bug you find another and another and it goes on and on. I tried to design a hp45 from the ground up, It took me months to design and debug and finally I had a working model only to be let down by ieee 754 binary floats as being inherently inaccurate. This is why everyone making hp clones use nut cpu emulators almost exclusively.

Most of the design engineers, working at hp, were MSc graduates, very clever top guys, they were at least 10 years ahead of everyone else at the time particularly when Bill and Dave were running hp.

Cheers
Darren