Program Bug

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Forum Attachments

Program Bug

(account deleted) 28 Mar 2018 19:55

**Hi everyone. I'm new here and I tutor math. I've been programming calculators by downloading programs from ticalc . org and simply moving them to TI-explorer. Needless to say, I'm a novice and largely ignorant of this practice. Please excuse my ignorance moving forward.

I am having the same problem that is described on this forum (I would post the link, but "guests and low-karma users are not allowed to publish links to this site"). I've copy and pasted the initial problem from the forum below.**

Show the initial problem

"I'm a fairly new programmer. I created a calculator app for my math students (I'm a tutor) by creating a bunch of individual programs in TI-BASIC and then combining/converting them into a single app using Basic Builder. Everything is working fine on the TI-83+, but on the TI-84+, the app is turning off the ►Frac function. That is, entering 3/5►Frac returns .6, not 3/5.

To make things even weirder, running the app again and quitting without inputting any data turns ►Frac back on. It's only when they actually try to enter data and do calculations that it has this effect.

A few other weirdnesses I've discovered as I've tried to get to the bottom of this. When the bug is in effect:

Making it a fake complex number gets around it. That is, (3/5 + i – i)►Frac returns 3/5. But it doesn't fix anything permanently; entering 3/5►Frac on the next line still yields .6. And changing modes from real to a+bi or vice versa has no effect.
Clearing the RAM fixes it (gets ►Frac working normally again until the next time they run the app).
Changing the mode to FRAC doesn't work. Nothing displays as a fraction, not even 3/5 + i – i. However, (3/5 + i – i)►Frac still works.
►F◄ ►D doesn't work either.
The F1-F4 shortcut menus are also disabled when the bug is in effect. Not a huge deal, but if it helps diagnose the problem, great.
I don't care about the shortcut menus particularly, but the students use ►Frac all the time, and I don't want them to have to restart the app every time they need to use ►Frac. Nor, obviously, do I want to have the app reset their RAM each time to avoid this problem.

The calculator I'm currently testing this on is a TI-84+ running 2.55MP. Disabling MathPrint (just by switching to Classic, not by downgrading the OS) doesn't change anything. Also, other functions exclusive to MP OS's (like remainder and logBASE) work fine.

Any ideas? Either about what could be causing this, or something I could add to the app to keep it from happening? Any insight would be appreciated. The thing is driving me crazy.

Thanks so much for your help. :)"

Someone posted the solution.

Show the posted solution

"I think I found the bug. The technical aspect is that I think the OS improperly handles the Input command when it is executed from an app (in particular, an app that sets its own error handler). Then it leaves two flags set that should have absolutely no bearing on displaying fractions. Anyways, this will hopefully fix the problem:

AsmPrgmFD362800C9

It just resets some flags like the OS normally does (but doesn't seem to do when the Input command is used)."

So the problem has been solved, however, I have absolutely no idea how to go about implementing the solution. I do not know how to insert the hexcode that will fix the bug. I downloaded basic builder and I know I need to download TI 84+ SDK to use Wappsign. However, it seems that TI 84+ SDK is nonexistent- all the links to the downloads are broken. It isn't available on TI's website either.

I am using a TI 84 +CE if that helps. After countless hours of researching this with nothing to show but frustration, I am happy to pay someone who can walk me through this process. If anyone is confident they can help, please let me know. Thank you!

Last edited on 28 Mar 2018 20:29 by Trenly Show more

Re: Program Bug

Trenly 28 Mar 2018 20:38

TI has removed all support for creating your own applications due to bugs like this. Although it is possible to find the TI 84+ SDK, any versions that are out there are likely quite unreliable and have the possibility of permanently bricking your calculator.

In this case the solution is not to add the hexcode into the basicbuilder app, but to make it as a program. That hexcode should function like any of the hexcodes on the hexcodes page. You simply create a new program on the calculator with the hexcode in it, including the AsmProgram. You exit the program editor, and on the home screen can run Asm(prgmYOURPROGRAM to run the hexcode. Be very cautious with this however, as that hexcode was likely not made to be used on a color calculator. The hexcode may run differently on a color calculator as the memory addresses for certain things are different. In addition, that code has not been tested (as far as I know), so unlike the hexcodes we feature here on TI|BD, we cannot guarantee that it will work safely.

Re: Program Bug

(account deleted) 29 Mar 2018 14:23

I have the TI-83 Plus SDK App if you would like it instead.

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Hewwo, my name is Achak Claw. I was formerly BioHazard.

Re: Program Bug

Trenly 29 Mar 2018 14:42

That could potentialy cause major irreversible issues if an app signed with it is used. TI removed both SDK’s from their site for a reason

Re: Program Bug

(account deleted) 29 Mar 2018 14:46

I have tried signing my own app before, could that be the case why I could not get it signed? I followed the instructions on the site exactly what it said, and failed.

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Hewwo, my name is Achak Claw. I was formerly BioHazard.