Questions regarding TI-Basic Interpreter and 8xp files as BASIC source code

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Questions regarding TI-Basic Interpreter and 8xp files as BASIC source code

HacksAndSlash01 18 Aug 2022 02:59

Hello, I am currently wondering as to what makes the TI-Basic interpreter tick as currently I want to widen the audience of TI-Basic by making a (sort-of) emulator that only runs basic as to not get muddled up with copyright issues as no roms would be distributed nor needed. Think of this project as similar to the CHIP-8 systems of old but I havent been able to figure out what is making a seemingly random string of bytes work as both a hex editor and notepad++ have brought up no concrete results as to how such an interpreter would need to work as I do want it to be able to run directly from files in the 8xp format. If anyone has any information regarding 8xp files as BASIC source code please share.

Last edited on 18 Aug 2022 02:59 by HacksAndSlash01 Show more

Re: Questions regarding TI-Basic Interpreter and 8xp files as BASIC source code

SuperSimo 13 Feb 2024 01:51

Hi HacksAndSlash01,

I realise that it's been 18 months and no one replied. I just saw your message. Did you get very far in your search?

I recently created a program that compiles and decompiles TI-Basic 8XP into plain text and vice-versa. I hope to release it publicly in the next few months, but could answer questions in the meantime if you still have any?

In short, to decipher the 8XP binary format, you first need to understand the binary structure of the file. And then you need to have a list of all the commands and their binary representation.

The forum won't allow me to post direct links, but here is the structure I found from my own research:

gist.github .com /SimonEast/244a0fd04526ea1acbec2e2ceb2e7924

gist.github .com /SimonEast/68fcf1d5351bc391d2811c824ea10d7a

Re: Questions regarding TI-Basic Interpreter and 8xp files as BASIC source code

Michael2_3B 13 Feb 2024 04:39

You may be interested in this document: https://merthsoft.com/linkguide/ti83+/fformat.html