Issue with "Money"

Programs for HP-41

Issue with "Money"

Postby jimwsong » Mon Apr 20, 2020 7:57 am

So I am using the Financial Pac 1. I can do IRR, Amort, and other functions when I do xeq and alpha amort alpha.. etc.
But when I follow the book and do XEQ alpha money alpha. I go through the CLR? and I say Y R/S key. Then End? R/S key. Then it says begin and I press in 30 (Yellow key) then "A" key which is supposed to multiple by 12 and set N value. But. when I get here is says nonexistent. Why are the template keys not mapping when I XEQ the money program of this pac?

Am I doing something wrong, or something else I need to do? I am following the instruction of financial pac. Specifically page 32 (Loan amortization schedule).

If anyone knows how to get this issue addressed, that would be great.

Thank you!
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Re: Issue with "Money"

Postby Garth » Mon Apr 20, 2020 8:06 am

Do you have one of the keys you're using assigned to something else, so it gets out of the program in the module?
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Re: Issue with "Money"

Postby jimwsong » Mon Apr 20, 2020 8:56 am

So i read both 41cx manual and the pac manual and assigned the keys to "money" and it seems to be working now. But damn, the amortization is so slow. I think definitely, not worth using it for this. Use a spreadsheet or the newer hp12c.

This is really a programmer calculator. Not for everyday users. Scientifically use is great. Business functions, not so great. Even though it works, it is slow and it should be kept as a vintage historical master-piece.

I am wondering if I replace the battery every year, if the clock and date I set will need to be reset each time, of ir there is a small capacitor to allow me to change battery without losing the date and time.

I also just read Garth's reply. I did a few things.

1. cleared all keys from memory with function XEQ alpha clrkey alpha, then I did Gold Key ASN alpha money alpha and 44 (which was the number that corresponded to the money application when I did Catalogue 6

Then i reran the money app. XEQ alpha money alpha. and it seems to work. Man that was painful. It is 5am almost now. sleep time. But I had to figure this out.

Thank you. I have so many pacs. I guess when you change pacs, it is best to clear all keys from memory, and start over. There are also duplicate XEQ if you se certain pacs. So when using AMORt, IRR< NPV, MIRR, BOND, etc. and there are templates (Bond for example). I would have to remap the keys again. It doesn't automatically do it when I XEQ the app. Which is a deficiency of this calculator. I wish it would auto map the keys when you XEQ various apps. That would have been nice.

Thank you
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Re: Issue with "Money"

Postby Garth » Mon Apr 20, 2020 8:33 pm

I think the CCD module or one of the others allowed you to have KEYS files, so you could swap out the entire set of key assignments quickly like the 71 does. I haven't looked into it much.

The memory and time and date will survive a battery change. I've heard of people leaving the batteries out for 24 hours and nothing was lost, but I still try to make the change as quick as I can.

The 41 is indeed slow when executing user code. Angel Martin has introduced several outstanding modules in the last several years that do things in MCode for maximum performance, and are much, much faster; but I am not aware of any financial ones he might have done. To compare speed, the Advantage module has some complex-number functions we use in electrical engineering all the time; but his 41z module does the same things about ten times as fast, as the functions are written in MCode rather than user code, and he also has far more of them, and a true 4-level complex stack rather than 2-level like the Advantage module has.
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