Classroom Workbench

Drag the slider and watch decimal, hexadecimal, binary, octal, and ASCII update together. Clickable bit grid with power-of-two column weights; 8-bit / 16-bit width toggle; control-code naming on the ASCII lens.

Five-lens readout, clickable bit grid, byte-boundary edge cases, predict-then-verify.

Drop gate primitives (NAND, AND, OR, NOT, XOR, BUFFER, CLOCK, DFF) onto a canvas, wire them, energize, watch signals propagate. Folded-in logic analyzer for sequential debugging.

12 gate primitives, testbench rows, propagation solver, folded logic analyzer.

Scroll the 6502 die from top-down overview through per-block reveal. Each week's lab lights up the block it touches. NAND-budget panel reads alongside the floorplan.

8 scrollytelling scenes, academy-original SVG floorplan, NAND-budget overlay.

Tick each week as your lab adds gates. Bar climbs from 0 toward the 3,500 NAND-equivalents the 6502 needs. Answers the Week-1 question every student asks: am I actually building a CPU?

Per-week checklist, running counter, LocalStorage autosave, badge embed mode.

2D board render with bitstream-load animation, 8 GPIO LEDs, 8 input buttons, USB-UART jack. Pick a demo bitstream, click Load, click Run, watch the LEDs count in binary.

5 demo bitstreams; memory-mapped IO at $D012 UART, $D013 LEDs, $D014 buttons.

4-pane workbench: source editor, compiled asm view, register + zero-page inspector, UART console. Hand-write 6502, watch the bytes appear, step through it, see the output land.

~50 mnemonics, 2-pass label resolver, 5 ready-to-load examples, UART at $D012.

Drop the 5 Lab 1.1 flashlight components into the 5 slots, energize, watch the LED light up. Probe the circuit with the 2-probe multimeter (voltage + resistance) and read node voltages a real $15 meter would show.

Click-to-place, per-slot target-match validation, voltage-trace mini-graph.

Per-lab entries, freehand sketch canvas, photo upload, multi-entry timeline. Export the whole journal as a PDF at the end of the week or the end of the course.

Markdown body, freehand canvas v1, IndexedDB autosave, export hooks.

Type Py6502v source, see it execute on CPython via Pyodide and on the emulated 6502 via py65, side by side. 5 golden examples bundled, all MATCH host vs target.

Pyodide host runner, py65 emulator, R5 compiler, 5 goldens MATCH.

Drag AND, OR, NOT, NAND, XOR onto a canvas, wire output to input, toggle the inputs. The truth-table sidebar evaluates the circuit across every input combination and highlights your live row.

Drag-drop gates, click-to-wire, exhaustive truth table, NAND-only NOT / half-adder / full-adder examples.

See the 32-bit address space populated by a working system across three runtime scenarios. Clickable region strip, live register pills, and zoom views into the gp-window and the active stack frame.

Region strip, pc/sp/gp/LCL/ARG/THIS/THAT pills, gp-window + la-ptr-table zoom, stack-frame zoom.

Type an assembly mnemonic, get the 32-bit field breakdown with color-coded fields and hex. Paste a hex word, decode it back. Watch the split S-format and B-format immediates land where they land.

R/I/S/B/U/J formats, color-coded fields, bidirectional encode/decode, split-immediate demonstration.

Step VM bytecode one op at a time and watch exactly what each line does to the stack. Push/pop across eight memory segments, nine arithmetic/logic ops, a live operand inspector, and a trace log.

5-pane layout, eight seedable segments, push/pop + add/sub/neg/eq/gt/lt/and/or/not, step + run.

Step VM bytecode with branching and function calls. The frame visualizer gains a card on each call and pops it on return; the LCL/ARG/THIS/THAT pointers move; the 5-word saved frame appears on the stack.

6-pane layout, label/goto/if-goto, full call/return protocol, frame cards, segment-pointer pills, callout narration.

Drop in NES CHR data, watch plane 0 and plane 1 combine into the four-color sprite the PPU draws. New: pick any sprite from the loaded ROM.

CHR table viewer, plane-by-plane animation, per-bitplane delta-color tinting, ROM sprite picker.

Three tabs: byte-by-byte XOR with live reversibility, Caesar / monoalphabetic substitution mapping, and frequency analysis with a shift slider that recovers the key from an English ciphertext histogram.

XOR byte table, alphabet-shift map, cipher-vs-English histograms, key-recovery slider.

Walk Alice, Bob, and Eve through key exchange at tiny parameters. Two tabs: classic modular-exponent DH and elliptic-curve DH. Private and public values are colored so you see what Eve can and cannot read.

Classic DH (p=23, g=5) + ECDH on a small curve, step-through, Eve's-view panel, live sliders.

9 DSP block primitives, drag-to-wire SVG patches, live Web Audio runtime, FFT spectrum painter. Demo flow ships preloaded: source → throttle → filter → FFT plus parallel audio sink.

9 blocks, drag-drop canvas, live AudioContext, FFT non-zero pixel verification at runtime.

Rust/WASM L2-L4 parser, academy filter syntax, 36-entry curated library, wireshark.org direct-fetch browse (3,136 upstream captures), drag-drop upload with magic-byte sniff, five Driver.js tutorial walkthroughs.

Rust core, filter parser, tabbed picker, upstream index, tutorial engine.