Re: TVM Program for the 42s Message #11 Posted by Karl Schneider on 24 Apr 2009, 3:08 a.m., in response to message #6 by Jeff O.
Jeff K and Jeff O --
This program is so compact because it relies on numerical iteration to solve each variable, not just "I%YR". The others could be solved by direct algebraic equations, but that would make for a longer program.
A time-saving step for entering this program: Create (store any value for) each variable in RUN mode beforehand. That way, it can be selected from a menu when needed in an instruction, instead of being typed in, letter-by-letter.
A former colleague of mine liked to run this program on his HP-42S a few years ago, but was frustrated by repeatedly and laboriously re-entering the program, each time memory was lost by a battery swap (a common HP-42S problem). He later got an HP-12C -- at my suggestion, I believe.
-- KS
Edited: 25 Apr 2009, 2:04 a.m.
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