Author Topic: Weird BASIC Glitch or error or something like that  (Read 8150 times)

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Offline DJ Omnimaga

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Re: Weird BASIC Glitch or error or something like that
« Reply #15 on: April 13, 2010, 12:26:23 am »
I still suspect something else than the TI OS could have caused it. Can you recreate this bug after a fresh RAM reset? Even the most stable ASM programs could be enough to trigger weird things. Even CODEX did.

Offline jsj795

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Re: Weird BASIC Glitch or error or something like that
« Reply #16 on: April 13, 2010, 12:37:59 am »
Well, I only tried it once on calculator, but on WabbitEmu, I was able to recreate it a lot of times, even with ram clears, all memory clear, etc.

Right after all memory clear (in wabbitemu):
RAM:24317
After you get memory error from too big of Ans variable:
RAM:16129
After making program named 'A' and recalling the answer 1 time:
RAM:7925
After recalling the answer 2nd time, weird stuff happens.



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Offline DJ Omnimaga

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Re: Weird BASIC Glitch or error or something like that
« Reply #17 on: April 13, 2010, 12:49:34 am »
wow,  so I guess it's a new bug then x.x

I wonder if OS 2.53 MP fixes it?

Offline Michael_Lee

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Re: Weird BASIC Glitch or error or something like that
« Reply #18 on: August 18, 2010, 03:17:19 pm »
Hmm, I tried this, but I just got the dotted cursor.  I have TI-84+SE, with OS 2.53 MP.
I tried using a normal letter for a string, instead of the serifed F in the screenshot.  I wonder if that makes a difference?
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Offline ztrumpet

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Re: Weird BASIC Glitch or error or something like that
« Reply #19 on: August 18, 2010, 03:21:43 pm »
I tried this too, but I just got the dotted cursor.  I have TI-84+SE, with OS 2.43. :)

Offline meishe91

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Re: Weird BASIC Glitch or error or something like that
« Reply #20 on: August 18, 2010, 03:25:56 pm »
Weird...I just did this again and the glitch happened to me this time ???
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Offline willrandship

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Re: Weird BASIC Glitch or error or something like that
« Reply #21 on: August 18, 2010, 05:42:01 pm »
I'm doing it on a fresh install of nspire os 1.1, after an all mem clear.

It's taking a while tho....

Edit: Nothing for the nspire
« Last Edit: August 18, 2010, 05:51:13 pm by willrandship »

Offline chrisf1337

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Re: Weird BASIC Glitch or error or something like that
« Reply #22 on: August 18, 2010, 05:51:35 pm »
I got the dotted cursor, OS 2.53 with no extra ram pages.
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Offline willrandship

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Re: Weird BASIC Glitch or error or something like that
« Reply #23 on: August 18, 2010, 05:55:27 pm »
I got something new: even after I ClrEnt, I'm still 4000 short, after deleting EVERYTHING

Ram Clear fixed it tho. :)

Offline Snake X

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Re: Weird BASIC Glitch or error or something like that
« Reply #24 on: August 18, 2010, 06:18:21 pm »
what I don't understand is how you got that F to show up. I don't get that in the window vars
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Offline chrisf1337

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Re: Weird BASIC Glitch or error or something like that
« Reply #25 on: August 18, 2010, 06:23:38 pm »
It's under Vars>Statistics>Test.
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Offline Snake X

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Re: Weird BASIC Glitch or error or something like that
« Reply #26 on: August 18, 2010, 06:29:23 pm »
it worked! cal'c crashed. I had to paste mine 3 time before it did random stuff. Its still going as I type this message right now. TI-83+ OS 1.19
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Offline thepenguin77

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Re: Weird BASIC Glitch or error or something like that
« Reply #27 on: August 18, 2010, 06:52:04 pm »
Uhhh... Another glitch I have to fix. I just did it on my calc. Recall it once, you get about 2000 F's, recall it twice you get about 500 F's then unlimited random charaters.

I'll look into it.

Oh, and 100% guarantee it has nothing to do with extra ram pages as those aren't used for this kind of thing.

Edit #1:
    It only works with two byte characters. The OS checks to see if the total ram used is equal to the total ram available. If you count by twos however, 999!=1000, 1001!=1000, the OS misses it's chance and guess what happens.

Edit #2:
    Found it. I'm not going to go through the trouble of fixing it because 1) I'm lazy, and 2) I'm not sure this has ever caused someone an accidental ram clear. But for future reference here is the problem:

In bcall($4942), (editTail) is checked with (editBtm) to see if they are equal, and if they're not, it figures that there is enough space to put another character. But if it is putting a two byte character, it goes past the end of the editBuffer and copies into oblivion. The way to fix it would be to either stop it once it goes over, or check for two byte characters and handle them accordingly.

For all those who couldn't get the recall glitch, delete your second recall. Add in one more byte, pressing enter will work. And then recall it again.
« Last Edit: August 18, 2010, 07:50:38 pm by thepenguin77 »
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Offline ztrumpet

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Re: Weird BASIC Glitch or error or something like that
« Reply #28 on: August 18, 2010, 09:52:33 pm »
That's crazy.  Nice find!  :)

Offline meishe91

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Re: Weird BASIC Glitch or error or something like that
« Reply #29 on: August 18, 2010, 10:00:17 pm »
Very nice, Penguin. Glad you could shed some light on what was going on. Not that I completely understand it :P But cool :)
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