I decided it might be easier to understand how 8xp tokenization works before going into 68k tokenization. I stumbled upon
this thread and got a pretty good idea of how tokenization works.
First question: If I had a program like:
Code:
Disp "HELLO!
Would it then be sent to the calculator as:
Code:
DE48454C4C4F2D
And if not, what would the format be?
You're missing the opening quote (
2A), but otherwise, yes, that's the correct tokenization. Then you'd have to have to pack the hexadecimal string into raw bytes, drop it into
the TI-83+ variable file format, and save the resulting binary file as an 8xp.
Runer112 wrote:
You're missing the opening quote (2A), but otherwise, yes, that's the correct tokenization. Then you'd have to have to pack the hexadecimal string into raw bytes
How would I go about doing that?
Runer112 wrote:
So I did some messing around here because I was able to see the program header (I can also sort of see the header when I open the 8xp program in notepad). So does that mean I would have this as the program:
Code:
**TI83F*
Variable Name: untitled
Comment: hiya there
DE2A48454C4C4F2D
Or would I just take all that header information and convert it to hex instead of leaving it as text?
EDIT: Did some more research and found that the header was in hexadecimal. So I assume that this would be an example of a header:
Code: 2A2A54493833462A1A0A0046696c652067656e65726174656420627920417373656d626c6578202d20446176696420476f6d657300
Then would I proceed to create the program, or is there some more information I need to add?
The file should be a binary file, not hexadecimal encoded as text. If you want to examine existing 8xp files for reference, you should use a hex editor (ex.
HxD), not a text editor.
Nice! The variable file format was pretty self explanatory after looking at it in a hex editor. However, I'm having a hard time understanding what the checksum is. According to the linkguide:
TI-83+ Link Protocol Guide wrote:
File checksum. This is the lower 16 bits of the sum of all bytes in the data section.
How would I add the bytes?
Battlesquid wrote:
Nice! The variable file format was pretty self explanatory after looking at it in a hex editor. However, I'm having a hard time understanding what the checksum is. According to the linkguide:
TI-83+ Link Protocol Guide wrote:
File checksum. This is the lower 16 bits of the sum of all bytes in the data section.
How would I add the bytes?
TI-83+ Link Protocol Guide wrote:
This is the lower 16 bits of the sum of all bytes in the data section.
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