u/mehonje — reddlx

Is This 8xp Format Guide Correct?

Section	Byte Range	Total Bytes	Notes
Signature	0 to 10	11	2A 2A 54 49 38 33 46 2A 1A 0A 00
Comment	11 to 52	42	Null padded
Number of bytes	53 to 54	2	Bytes 55 to end-2
Section ID	55-56	2	0D 00
Variable Length	57-58	2	Length of Body Length + Program
Type ID	59	1	05 for program 06 for protected program
Name	60-67	8	Null Padded
Version	68	1	00
Flag	69	1	00 for RAM 80 for Archive
Length	70-71	2	Length of Body Length + Program
Body Length	72-73	2	Length of Program
Program	74 to end-2	Variable	Obvious
Checksum	End-2 to end	2	Length of Section ID + Variable Length + Type ID + Name + Version + Flag + Length + Body Length + Program, overflows and resets

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u/mehonje — 5 days ago

▲ 4 r/ti84hacks+1 crossposts

TI-BASIC devs, What Do You Want in Development Tools?

Edit: I've decided to go with option 2, with normal code editing.

I'm working on some TI-BASIC development tools, with a CLI for converting between txt and 8xp files and writing TI-BASIC programs. I'm coming to a crossroads at where to take the project right now.

I have two options:

Modal Token-based Editor

This is easier to make and prevents any unknown bytes from entering the calculator.

Two modes: Normal and Add

The 8xp is converted to commands, and then displayed. In Normal mode the arrow keys navigate through the file.

Typing switches the mode of the editor to Add. The typed text is added to a buffer, the arrow keys allow navigation through the commands, like on the calculator. Pressing escape clears the buffer and places you in Normal mode.

When a match of text in the buffer to a TI-BASIC command, using a similarity algorithm, it is displayed. The up and down arrow keys allow you to select which command you want to add. Left and right allow you to move the cursor in the buffer.