This list will grow and shrink as features are implemented and new ones are suggested.
- Horizontal line fill to non-background.
- Horizontal line fill to background right.
- Horizontal line fill to foreground.
- Horizontal line fill to non-foreground right.
- Draw a circular arc.
- Plot and fill a segment.
- Plot and fill a sector.
- Move a rectangular block.
- Copy a rectangular block.
- Swap a rectangular block.
- *KEY (redefine a function or special key)
- *RENAME (rename a file)
- *SPOOL (copy console output to a file)
- Ability to load assembly binary (compiled) libraries.
- Some way of getting addresses of variables in RAM by name (eg address of graphics buffer or text foreground colour variable) rather than rely on hard-coding constants into programs.
- USB freezes/crashes on TI-84+ series.