KnightOS

OATHKEEPERKNIGHTOS

Programs

Game

Utilities

Controls

Using the calculator +

Calculate: Type or tap a number, then press ENTER. Press CLEAR to start again. Previous results stay in History under 2nd → ENTER.
Graph: Set functions with Y=, choose limits with WINDOW, then GRAPH. ZOOM changes the scale. TRACE follows a curve. 2nd → GRAPH opens its value table. Graphs use radians.
Keys: 2nd activates a gold legend. ALPHA enters a green letter. F1–F5 match the graph keys. Escape or 2nd → MODE returns Home. Press 2nd → ON to power off. Press ON to wake at Home.
Oathkeeper extensions: MATH offers numerical tools and symbolic algebra. 2nd → x⁻¹ opens matrix tools. MODE chooses numerical or exact math.

Worked examples +

Use the calculator’s arrow pad to move. Press a key on the screen or use its keyboard equivalent.

Text editor letter keys

Starts in lowercase. Alpha switches letter case; 2nd switches to symbols.

Included programs run on the open-source KnightOS firmware.

Credits, licenses & release notes

Oathkeeper Graphing Calculator. Browser interface, controls and integration developed with AI.

math.js 15.2.0 — Jos de Jong and contributors · Apache-2.0. Nerdamer 1.1.13 — Martin Donk and contributors · MIT. z80e and OpenTI bindings — KnightOS Group · MIT. KnightOS kernel and core applications — KnightOS Group · MIT.

Read all license notices · Build & use guide

Modern numerical results normally use floating-point arithmetic; use bignumber(...) for decimal precision or Exact & symbolic for rational algebra. Function graphs are sampled views, not proofs.

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