CODEWITHSUNDEEP
textcharacter-encodingcharacterbasicti-basic
Steam Ranger
Steam Ranger

Reputation: 49

TI-Basic Problems

I recently bought a TI-84 Plus CE, and have been making programs using TI-BASIC.

I'm trying to make a simple text editor, and I need to convert character codes to characters. However, it seems that the char() command doesn't exist?

Please Help!

Upvotes: 3

Views: 130

Answers (1)

Jakob Lovern
Jakob Lovern

Reputation: 1341

I don't believe that 84+ TI-BASIC supports ascii in this way (though I know that 68k BASIC had the ord() command) but one thing you could do is store all the typeable glyphs into a string (see: prgmGLYPHS on TI-Basic Developer for example) and then use inString() and sub() to store/retrieve their values. It's not pretty, and it's not fast, but it works. Here's an example using only the uppercase letters:

:"ABCDEFGHIJKLMNOPQRSTUVWXYZ→Str1
:Input ">",Str2
:Disp inString(Str1,Str2
:Input ">",N
:Disp sub(Str1,N,1

Note: The following pertains to my experience with the TI-84+ SE. The 84+ CE runs on a newer processor than the zilog Z80, so YMMV:

I expect what you're doing is storing your text in a List. Another thing that might be more efficient and secure is storing your text as an AppVar. These are allocated blocks of RAM/ROM that you can read to/write to at will...as long as you have a library to do it. With the 84+ SE you needed to use Celtic3 (or Doors CS, which includes Celtic as a library) to do that. I haven't used the 84+ CE enough to tell you what exists there, as the assembly code is entirely different. According to this reddit post the best way to do that is use the C toolchain, but I don't have experience with this either.

Upvotes: 2

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