The forensics algorithm for the 10s  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: The forensics algorithm for the 10s (/thread162163.html) 
The forensics algorithm for the 10s  Palmer O. Hanson, Jr.  01192010 I had a good weekend for collecting by finding a Pickett N500S in very good condition for two dollars, a old paper reactance slide rule by Shure for a dollar, and a HP10s for three dollars.
I ran Mike Sebastian's forensic algorithm on the 10s. The answer is 9.000000002124 . The eight zeroes after the decimal point makes the result better than any other HP machine listed at Mike's site. Am I doing something incorrectly or is the 10s really that good?
Re: The forensics algorithm for the 10s  Gerson W. Barbosa  01192010
Quote: The HP30S, also listed at the site, returns 9.000000000, for which Rodger Rosenbaum has provided an explanation:
http://www.hpmuseum.org/cgisys/cgiwrap/hpmuseum/archv015.cgi?read=85973 Edited: 19 Jan 2010, 10:48 p.m.
Re: The forensics algorithm for the 10s > 30b  Katie Wasserman  01192010 The 30b comes in at 8.99999864267, the same as the Pioneers (20S, 32S, etc.). Katie
Re: The forensics algorithm for the 10s  Palmer O. Hanson, Jr.  01202010 The end of Rodger's dissertation states: Quote:I did the Rodger's 9.1 version of the forensics algorithm on my 10s and received 9.100000002602 . Does that suggest that the 10s isn't doing any of the funny arithmetic that Rodger was writing about? Re: The forensics algorithm for the 10s  Gerson W. Barbosa  01202010
Quote: Yes, apparently the 10s isn't doing any trick to make it look more accurate than it really is, otherwise it would return 9.00000000000 in the original test. Assuming the algorithms are correct, it is possible internal calculations are carried out with 15 or 16 digits internally. On classic 12digit HP calculators intermediate results are rounded to the number of digits of the display, so the forensic results will be a bit away from 9, even though the algorithms are flawless: http://www.hpmuseum.org/cgisys/cgiwrap/hpmuseum/archv016.cgi?read=103151
It looks like HP is back to its original philosopy (see Katie's result for the 30b below).
