Oldie question...HPX V1N4 Space Shuttle Lander game



#5

Page 19 and 20 of the HPX Journal V1N4.

Has a space shuttle landing simulator for the HP41.

Questions:

1) Steps 109 and 155 are listed as "EXP". The other steps in the listing are fairly evident, but this one I'm not sure about. Is this "e^x"? or "10^x"? or ? The program has number entry lines where the EEX key is used to enter 1E3 for example. The program has -15 in the X register prior to this step.

2) More general question, I guess. Anyone ever try this? :-)


#6

Hi,

I don't know much at all about the 41c, but isn't EXP usually natural, and ALOG usually the "antilog" of Log base 10?


#7

True, but since the listing shows x^2 and y^x, I would have thought that the exponential function would have been e^x.

That's what I think it is, but the program listing didn't explain that abbreviation. :-)

Gene


#8

Maybe they mean EEX... ?


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