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H->HMS conversion HP-15C vs. HP42S vs HP67
09-06-2018, 05:01 PM (This post was last modified: 09-06-2018 05:08 PM by Dieter.)
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RE: H->HMS conversion HP-15C vs. HP42S vs HP67
(09-06-2018 11:16 AM)Siegfried Wrote:  Legendary 67 and Free42 return 146:44:24, the same as Excel, while
HP-15C returns 146:54:56

I haven't had a chance to check on real hardware but was under the impression that all these emulators used real ROMs.

Obviously your 15C version doesn't. HP's own 15C PC-emulator as well as the Panamatik HP67 emulator use the original ROM and return the correct result: 146,5424000.

If one of your simulators returns 146,5456 it would be interesting to know the intermediate results. I can't believe there is such a big roundoff error. So would you please post the results after each step?

183,38 →H gives 183,6333333
0,8 × this is 146,9066666 (last digit rounded down to 6)
→H.MS then returns 146,5424000

Now, what do you get?

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RE: H->HMS conversion HP-15C vs. HP42S vs HP67 - Dieter - 09-06-2018 05:01 PM

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