Looking for TVM contributions

[Steve Simpkin]

(05-12-2024 08:48 PM)dm319 Wrote:  

(05-12-2024 08:13 PM)Albert Chan Wrote:  Where can I read about Kahan's improved TVM (for rate) algorithm?

Look here! I even mention in that thread that you would have found the article interesting!

The link seems to be down see this HP Journal 1977 issue 10. Though actually, this is about the HP-92, so not sure it it's talking about the changes implemented into the HP-27 given it came out a year after.

Use these links instead.

The Oct 1977 issue of HP Journal magazine describes the improved TVM solver user interface of the HP-92 Financial Printing desktop calculator in detail (magazine page 22, PDF page 34). This appears to be the final user interface iteration that is used on the HP-12C. It appears to also discuss some of the improvements made in the algorithms. A PDF of this issue is available here:
http://hparchive.com/Journals/HPJ-1977-10.pdf

There is also an article by Dennis Harms ("The New Accuracy: Making 2 to the third = 8") in the Nov 1976 issue of HP Journal magazine that discusses how HP implemented an improved accuracy for certain functions. A PDF of this issue is available here:
http://hparchive.com/Journals/HPJ-1976-11.pdf