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(HP-67/97) Planetary Ephemeris
09-20-2015, 08:53 PM (This post was last modified: 09-20-2015 08:58 PM by Dieter.)
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RE: (HP-67/97) Planetary Ephemeris
(09-13-2015 11:10 AM)Thomas Klemm Wrote:  From Programming Handheld Calculators by Paul Lutus.

Could you take a look at line 101? The code there is...

 97 1
 98 RCL (i)
 99 FRAC
100 STO 3
101 -
102 1
103 RCL 3
104 -
105 /

This calculates (1–R3)/(1–R3) which is always 1. ;-)
I think line 101 should read "+".

I also assume that "lbl A", "lbl B", "lbl C" and "lbl D" in the user instructions (table 3) are supposed to mean simply "A", "B", "C" and "D".
Typing a label instruction in run mode does not do anything. ;-)

Finally there are some "TF" commands. This was a HP65 instruction. On the HP67/97 testing flags is done with the "F?" command. I hope the program considers the 67/97's special behaviour of Flag 2 tests. ;-)

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RE: (HP-67/97) Planetary Ephemeris - Dieter - 09-20-2015 08:53 PM

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