BUS_IN has input pins only (left side), BUS_OUT has output pins
only (right side). No internal connections between them — BUS_OUT
reads values directly from its paired BUS_IN via busPairId. The
bus cable between them is purely visual, representing the grouped
signal bundle.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Click and drag on empty space to draw a selection rectangle. Gates
inside the box get selected (cyan dashed outline). Drag any selected
gate to move all of them together. Delete/Backspace removes all
selected gates and their connections. Escape clears the selection.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Hold Shift and drag across wires to create a BUS gate that groups
them together. The cut line shows a live preview with wire count.
BUS gates are pass-through (each input maps to its output) and
render as a thin cyan bar with ports on each side.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Selected gate type stays active after placing, allowing multiple
gates of the same type without re-selecting. Right-click or Escape
to cancel placing mode.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Double-click rename for INPUT/OUTPUT/CLOCK gates now only triggers
when inside the component editor, not in the main circuit.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Opens the component editor with the internal circuit loaded for
modification. On save, updates the component definition and all
existing instances in the main circuit.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Double-click any INPUT, OUTPUT, or CLOCK gate to assign a custom label.
Labels are shown inside the gate and used in waveform viewer instead of
generic IN_0/OUT_0 names. Example circuits now ship with meaningful
labels (S, R, D, EN, Q, Q̅, CLK).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace single-pass recursive evaluation with iterative fixed-point
evaluation that runs multiple passes until all gate values stabilize.
Crucially, gate values are NO LONGER reset to 0 before evaluation,
which preserves latch/flip-flop memory state.
Add console logs for toggle, wire, and evaluation stability debugging.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add 4 example circuits accessible from a new toolbar dropdown:
- SR Flip-Flop (NOR) — basic set-reset latch
- SR Flip-Flop (NAND) — active-low variant
- D Latch (1-bit Memory) — gated latch with enable
- D Flip-Flop (Master-Slave) — edge-triggered with CLK
Each example shows name + description in the dropdown and loads
the full circuit with proper gate placement and wiring.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace horizontal toolbar sections with dropdown buttons (I/O, Gates,
Components). Each opens a dropdown menu on click, keeping the toolbar
clean and compact. Dropdowns close on outside click or after selecting
a gate.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Redesign toolbar sections to use horizontal button rows instead of
vertical stacking. Fix component placement by attaching click handlers
directly to dynamically created buttons and passing correct gate object
shape to getComponentWidth/Height.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Redesigned toolbar with I/O, Gates, and Components sections
- Component editor: sub-canvas mode to design reusable chips
- Save/Cancel with main circuit state preservation
- Components persist in localStorage
- Custom components render as purple chips with dynamic I/O ports
- Component evaluation simulates internal circuit as black box
- Toolbar height increased to 56px for section labels
- All height references updated consistently
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- INPUT/CLOCK gates can now be dragged (click-without-move = toggle,
click-and-drag = move). Uses 4px movement threshold.
- Waveform only records samples on intentional actions (INPUT toggle,
manual step, simulation tick), not on gate placement/movement/connections.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add progressive puzzle mode alongside the existing sandbox:
- 8 levels from basic gates to 2-bit adder
- Truth table verification with pass/fail feedback
- Gate restrictions per level
- Custom components system (save circuits as reusable chips)
- Save/load circuits as JSON
- Level selection sidebar with difficulty ratings
- Mode toggle: Sandbox (free play) vs Puzzle (guided levels)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
