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HP-35 ('72) Bug Fixes & Variations - Printable Version

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HP-35 ('72) Bug Fixes & Variations - Matt Agajanian - 04-18-2012

Hello all.

During which body redesign did HP implement the ln(2.02) bug fix on the HP-35?

Re: HP-35 ('72) Bug Fixes & Variations - Eric Smith - 04-18-2012

Firmware changes don't generally correlate well with mechanical changes.

It's a ROM issue. - Frank Boehm (Germany) - 04-19-2012

US-made 35s with 1143-serial numbers (probably not all though) had the bug. If judging by the casing, I'd say it correlates more or less with the "raised dot" on the "5"-key". However a lot of calculators were sent back for service, the faulty ROMs were desoldered and replaced.