MI-84 Calculator

0.2 - 2026-07-28

Added

• In-inventory graphing with configurable Window settings, trace navigation, and Zoom/Memory tools.
• Persistent calculation history, scalar variables, Y= equations, Window settings, Mode settings, and zoom memory.
• Real and rectangular-complex expression evaluation, including angle-aware trigonometry, scientific/engineering/fixed display modes, Ans, and implicit multiplication.
• Structured fraction and mixed-number entry, roots, logarithms, permutations, combinations, and factorial.
• TEST/LOGIC, ANGLE, MATH/NUM/CMPLX/PROB/FRAC compact menus and FRAC/FUNC bottom-tab overlays.
• Configurable inventory-only controls for calculator visibility, its toggle button, and position reset.

Changed

• Visible but unfinished calculator operations are explicitly unavailable instead of falling back to a different key action.

Known issues

• Some exact results may display small floating-point residue, such as sin(π).
• Y=Ans fails silently in the Y= editor.
• 2nd-modified entries do not insert in the Y= editor.
• Insert mode has no visual indicator.