Complex TI-57 Programs
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08-12-2022, 07:29 PM
(This post was last modified: 08-12-2022 07:42 PM by Matt Agajanian.)
Post: #1
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Complex TI-57 Programs
Hi all.
Now that there's TI-57 for iOS, RCL-57, the opportunities of writing programs are possible. Even with its short program memory, limited parentheses/pending operations limits, pair of subroutine levels, and registers in which one register is used for scientific functions, I’m sure the 57 has some robust potential. So, what programs have you written that pushed the 57 to its potential? |
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08-12-2022, 11:08 PM
(This post was last modified: 08-13-2022 03:02 AM by pauln.)
Post: #2
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RE: Complex TI-57 Programs
As I reported earlier, for me it was:
The TI-57 being mostly an educational tool, it doesn't seem to have many complex programs. But I believe it has potential. In fact it is not too far from the HP-25:
Tie: both calculators have fully merged steps TI-57 advantage
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08-13-2022, 12:00 AM
Post: #3
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RE: Complex TI-57 Programs
(08-12-2022 11:08 PM)pauln Wrote: As I reported earlier, for me it was: The TI-57 being mostly an educational tool, it doesn't seem to have many complex programs. But I believe it has potential. In fact it is not too far from the HP-25: After briefly studying the TI-57 manual I would also add the following advantages TI-57 advantage
HP-25 advantage
One additional undocumented advantage that the TI-57 has over the HP-25 model (not the HP-25C) is that you can turn the TI-57 display off which then draws so little power from the batteries that it is almost like having a constant memory function. https://www.rskey.org/gene/calcgene/57c.htm |
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08-13-2022, 12:12 AM
Post: #4
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RE: Complex TI-57 Programs
Not sure if I mistakenly thought the transcendental functions used a register in the 57. So, if I’m mistaken, aside from the t register using R7, what other operations does the 57 use register 7 for?
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08-13-2022, 12:21 AM
Post: #5
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RE: Complex TI-57 Programs
For the statistic functions: register 7 holds the number of data points. For statistic functions, other user registers are used, for sum, sum of squares, etc.
No user register seems to be used for transcendental functions. I just checked with RCL-57 by going to the Register View. |
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08-13-2022, 12:52 AM
Post: #6
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RE: Complex TI-57 Programs
(08-13-2022 12:21 AM)pauln Wrote: For the statistic functions: register 7 holds the number of data points. For statistic functions, other user registers are used, for sum, sum of squares, etc. Here is the complete alternate use of memory locations from the TI-57 manual. |
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08-13-2022, 01:05 AM
Post: #7
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RE: Complex TI-57 Programs
(08-13-2022 12:00 AM)Steve Simpkin Wrote: [...] After briefly studying the TI-57 manual I would also add the following advantages [...] Great summary. And it's true that some TI-57 features are kind of hidden: it took me a long time to find out that "INV C.t" clears out user registers. And, as you point out later, one problem with the TI-57 is that registers 5 and 6 may be overridden "silently" when evaluating complex arithmetic expressions. |
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08-13-2022, 08:07 PM
Post: #8
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RE: Complex TI-57 Programs
** Lots ** of the TI-57 data registers are dual purpose. Always have to be on guard to lose them if you are not careful.
Comparatively, the SR-56 beats the TI-57 in most regards. Gene |
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08-20-2022, 08:29 AM
Post: #9
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RE: Complex TI-57 Programs
(08-12-2022 07:29 PM)Matt Agajanian Wrote: So, what programs have you written that pushed the 57 to its potential? Maybe this doesn't fit exactly: Binary-to-Decimal conversion But since we're already comparing the TI-57 to the HP-25, this could be an interesting example. Not sure if I was able to rewrite the N-Queens program for the TI-57. It uses only storage arithmetic, so this could be translated verbatim. But then we still need some additional steps for the labels. |
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08-20-2022, 03:00 PM
Post: #10
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RE: Complex TI-57 Programs
There are also a couple of remarkable programs to compute the first 48 digits of e and all digits of 52! in a different thread:
https://www.hpmuseum.org/forum/thread-18...#pid163222 They use a 6-register "rotating stack with wrap-around" technique. This may be one case where the TI-57 has the advantage over the HP-25 which lacks "Exc n" (Exchange between the display and register n). |
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