Suggestions for HP: Make an HP12C+ calculator Message #1 Posted by Gene Wright on 14 Oct 2002, 10:58 a.m.
What should go into a 12c+?
1) Faster. Solve for "i" in a second or two, rather than 1015.
2) Programming features: Add subroutines/return; add x>y and x NOT EQUAL 0
3) Add fix function for formatting display, replacing using f [digit], which uses up the yellowshifted locations of each numeric digit
4) Add direct computation of slope and intercept for linear regression
5) Add permutations and combinations
6) Add x^2
7) Add trig and inverses, common log and antilog, degrees or radians mode
8) Fix solution given when solving for "n" to be actual # of periods, not rounded up automatically
9) Add hyperbolic trig functions (using a prefix key perhaps)
10) Add more memory for programs
11) Add Normal Distribution and Inverse Normal Distribution
12) Add population standard deviation calculation
There are 26 easy to use "unoccupied" locations on the 12C keyboard that are available for functions. My suggestions use:
#1  None
#2  4 locations
#3  1 location
#3  2 locations
#5  2 locations
#6  1 location
#7  10 locations
#8  None
#9  1 location
#10  None
#11  2 locations
#12  1 location
a total of 24 of these 26 locations. C'mon HP, you've got 2 locations free!
Gene
P.S. The unused locations are: yellow shifted locations of the STO, RCL, CHS, EEX, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ., E+, /, *, , + keys; blue shifted locations of the STO, RCL, /, *, , + keys. Note that being able to use the yellow shift locations of 0  9 REQUIRES a FIX function.
