Re: strange opening at back of an HP 46: one hypothesis Message #3 Posted by Andrés C. Rodríguez (Argentina) on 4 Oct 2004, 7:31 p.m., in response to message #1 by jan
If the stopwatch function (officialy unsupported but available on the HP45) was available in the HP46 (may it be or not); then some switches, wired to the individual key contacts may have been used to capture the timing of up to 10 events.
When the HP45 was used as a stopwatch, and the clock was running, you can press any of the numeric keys and the time will be stored on the corresponding register (R0-R9). When the clock was stopped, pressing the same key will show the time previously stored on that register.
Please note that these comments are based on 30-years old memories (I never had an HP45), so there may be some inaccuracies...
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