TVM WP34s trouble  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: TVM WP34s trouble (/thread245632.html) 
TVM WP34s trouble  Jim P  06282013 I will fully admit to being an idiot... if I'm missing something obvious. Otherwise it's a simple struggle with the TVM routine (the enhanced one that is with the ver 3.2 build.) The text file accompanying the routine didn't give me the clues I was looking for. I entered a value, then A followed by A for N, and a new value, then A followed by B for I, and so forth, skipping D because I wanted to solve for "PMT"  But then  everything I tried (followed by D to solve for PMT) gave me ridiculous answers or square roots, which doesn't seem helpful.
Apologies to Franz who wrote the routine if my blindness indicates simple low IQ.... might I suggest a couple of "examples for dummies" in the text file along with keystrokes? It's the only thing keeping me from using the WP34s as my regular machine.
Re: TVM WP34s trouble  Marcus von Cube, Germany  06282013 If D gives you a square root instead of running the TVM application there must be something wrong with the current program counter. Make sure you start 'TVM' correctly from CAT or with XEQ'TVM'.
I'm not proficient with Franz' code so we need to wait for an answer by him.
Re: TVM WP34s trouble  fhub  06282013 Hi Jim,
the only thing I could imagine is that you didn't press the (prefix) key [A] before [D].
Assuming you've started the TVM solver with XEQ'TVM' (or selecting it from the CATalog and press XEQ), here's an example of a calculation for PMT: 10 [A][A] enters N and displays N=10 In fact [A] is always necessary as prefix before any of the 5 TVM keys [A]...[>], and it just displays 'N I PV PMT FV' for about 10 seconds (waiting for your next keypress). Whether you _enter_ or _calculate_ any value depends on if you previously have entered any number: if you've entered a number it is just stored, but if you did not enter a number before, then this value is calculated.
Franz
Re: TVM WP34s trouble  Jim P  06282013 Thank you Franz, Re: TVM WP34s trouble  fhub  06282013 Quote:Yes, this [A] prefix is not as easy as it _could_ be, but since we don't have 5 hotkeys on the WP34s (the 5th key [>] has a special function), using [A] as a prefix was unfortunately the only possibility I saw to use the 5 topkeys in a row. I would also have preferred 5 (or even all 6) topkeys as function keys, but the WP34s team didn't fulfill this wish. So let's wait for the WP43s ... ;)
Franz
