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Author Topic: Oh Nspire-Lua, you so crazy!  (Read 6226 times)

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Offline NecroBumpist

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Oh Nspire-Lua, you so crazy!
« on: October 08, 2011, 05:41:25 pm »
I was trying to make a Lua IDE when i came across this bug with text rendering.
Keep in mind this happens much faster in real time.

Spoiler For probable cause:
The negative symbol is what I'm typing, and it is likely a two byte character, however, when I backspace, I only remove one byte at a time, and this causes it to read whatever comes after the string in RAM I'm assuming.
« Last Edit: October 08, 2011, 05:41:57 pm by NecroBumpist »
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Offline Adriweb

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Re: Oh Nspire-Lua, you so crazy!
« Reply #1 on: October 08, 2011, 05:54:09 pm »
Interesting.

I've come across things like this but it appears that TI fixed most of these memory-hacking stuff (in the upcoming version).



I can also assume you're right about direc tmemory reading and somehintg like forcing a cast to a string output, with the correspondig ascii code being some chinese chars.....


Can you see more of the memory by dumping it thourgh nspire_emu / ncubate and try to see what could match with the chinese char's ascii number ?
« Last Edit: October 08, 2011, 05:56:26 pm by adriweb »
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Offline annoyingcalc

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Re: Oh Nspire-Lua, you so crazy!
« Reply #2 on: October 08, 2011, 06:52:47 pm »
Hmmis that bug also on the ti-nspire cx?
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Offline Deep Toaster

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Re: Oh Nspire-Lua, you so crazy!
« Reply #3 on: October 08, 2011, 07:33:39 pm »
In case this is helpful, here's the first character that appears and keeps flashing:



http://www.fileformat.info/info/unicode/char/6d40/index.htm

The UTF-8 is 0xE6 0xB5 0x80.
« Last Edit: October 08, 2011, 07:34:09 pm by Deep Thought »
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Offline Jim Bauwens

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Re: Oh Nspire-Lua, you so crazy!
« Reply #4 on: October 09, 2011, 02:35:01 pm »
I have encountered this bug before (I actually need to fix my Lua Console to support utf-8 :p), and the solution is to use TI's added string functions, uchar, ubyte and usub.
They should work just the same as their original counterparts :)

As for reading memory, its only a few bytes, so not so useful. But nevertheless, quite interesting :D
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Offline pianoman

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Re: Oh Nspire-Lua, you so crazy!
« Reply #5 on: October 11, 2011, 05:41:13 pm »
If it's any help, that's the chinese Qu character.
Don't know what it means... :P
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Offline Yeong

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Re: Oh Nspire-Lua, you so crazy!
« Reply #6 on: October 11, 2011, 05:46:09 pm »
I think it means alcohol.
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Offline Chockosta

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Re: Oh Nspire-Lua, you so crazy!
« Reply #7 on: October 12, 2011, 08:27:01 am »
This happened to me really often, when I was playing with a little text editor that I made.
I even stored chinese characters in an external string :)
« Last Edit: October 12, 2011, 08:27:33 am by Chockosta »
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Offline cyanophycean314

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Re: Oh Nspire-Lua, you so crazy!
« Reply #8 on: December 07, 2011, 05:09:06 pm »
It's the character qu. And yes it is related to alcohol.
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