SNES Demos
133 Super Nintendo programs compiled from C with an LLVM-based 65816 toolchain — each a stress-test for the compiler's 16-bit-accumulator codegen and a runnable ROM verified against MAME and bsnes-jg. Click any card to play.
Newest Releases
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Software Vectors
Self-running — BRK and COP packets traverse their own vector lanes
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Far-Pointer Order Shuffle
Self-running — pointer lanes reorder across the bank boundary
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64K Bank-Boundary Walk
Self-running — two walkers cross the gold 64K bank seam
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Threaded Mode Interpreter
Self-running — A8/A16 handler lanes feed an output glyph
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Mid-Bracket NMI Tunnel
Self-running — NMI needle cuts through the native-width tunnel
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Seismograph Absolute Trace
Self-running — gold signed trace and cyan rectified envelope
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64-Bit Limb-Seam Barrel
Self-running — three shift bands sweep the highlighted limb seams
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Bitboard Knight Tour
Self-running — gold knight, cyan reachable squares, blue visited trail
Fractals
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Function Plotter
Self-running — no controls
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L-System Plant
Self-running — no controls
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7 Double-Precision Mandelbrot
Self-running — no controls
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7 Soft-Float Mandelbrot
Self-running — no controls
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Burning Ship Fractal
Self-running — no controls
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7 Julia Set Explorer
Self-running — no controls
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7 Buddhabrot
Self-running — no controls
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Newton's Fractal
Self-running — no controls
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Domain Colouring
Self-running — the field develops, then the palette shimmers
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7 Mode 7 Mandelbrot (OOP)
Self-running — animated build, coarse-to-fine reveal, then Mode 7 spin and zoom
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7 Mode 7 Mandelbrot
Self-running — reveals coarse-to-fine, then spins and zooms
Physics & Simulation
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Barnes-Hut Galaxy
Self-running — no controls
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Boids Flock
Self-running — no controls
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Raycaster Maze
Self-running — no controls
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N-body Orbits
Self-running — no controls
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Double Pendulum (Chaos)
Self-running — no controls
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Wireframe 3-D Solid
↑ ↓ spin Y · ← → spin X · Q/W dolly · X/A solid · S palette · Shift trail
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Fmin/Fmax Speed Cap
Self-running · teal=normal · orange=capped · red=NaN-recovered
Cellular Automata
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Conway's Game of Life
Self-running — no controls
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Doom Fire
Self-running — no controls
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Reaction-Diffusion
Self-running — no controls
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1-D Cellular Automaton
X toggle rule · Enter reset
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Union-Find Percolation
Self-running — the wet region spreads, then reseeds
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Marching Squares
Self-running — blobs merge and split under a contour
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3-D Grid Voxel Life
Self-running — a 3-D automaton tumbles as a voxel cube
Motion & Curves
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Times-table Cardioid
Self-running — no controls
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Hilbert Curve
Self-running — no controls
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VA_ARG Formatter
Self-running — no controls
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Lissajous Harmonograph
Self-running — no controls
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Fourier Epicycles
Self-running — no controls
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CORDIC Rotator
Self-running — no controls
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Spirograph
↑ ↓ ring · ← → wheel · Q/W pen · X/A family · Shift preset
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Copysign Compass
Self-running — quadrant boundaries rotate as phase sweeps
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Signed Multiply-Overflow Orbit
Self-running — trails build up and sparks fire on overflow
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Saturating Comet Trails
Self-running — comets streak and cross, saturating to white
Algorithms & Data
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Far-Pointer Order Shuffle
Self-running — pointer lanes reorder across the bank boundary
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Threaded Mode Interpreter
Self-running — A8/A16 handler lanes feed an output glyph
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Bitboard Knight Tour
Self-running — gold knight, cyan reachable squares, blue visited trail
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Maze Generate + Solve
Self-running — no controls
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Sorting Race
Self-running — no controls
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Duff Dissolve
Self-running — one image dissolves into the next
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qsort Sort Visualizer
Self-running — bars reshuffle then re-sort
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LZ77 Decompress Reveal
Self-running — the compressed image decodes and reveals
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Fenwick Tree
Self-running — the signal moves, its integral reshapes
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Radix Sort
Self-running — bars re-bucket pass by pass, then reshuffle
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Convex Hull
Self-running — the hull rubber-bands around the points
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Edit-Distance DP
Self-running — the table and path cycle through word pairs
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Huffman Decode
Self-running — the coded image decodes in, then replays
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Truncation Staircase
Self-running · trunc / floor / round diverge on negatives
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Ulam Prime Sieve
Self-running · Ulam spiral of primes revealing outward
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Range Coder
Self-running · range bar + emitted-byte waterfall
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Scope-Guard Ripple Tank
Self-running · ripples spread; HUD shows cleanup count
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Signed-Bitfield Terrain
Self-running — ridges erode and valleys fill each frame
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Memmove Scroll Slabs
Self-running — upper band scrolls down, lower scrolls up
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256-bit Modular Exponentiation
Self-running — the 256-bit shared secret as a colour field
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Pressure-Cooker Fixed-Point Evaluator
Self-running — an implicit surface with a level-set boundary
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Odd-Width Mask Sculptor
Self-running — four mask-width bands terrace and flow
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64-bit Multi-Key Record Sort
Self-running — rows resort under a two-level 64-bit key
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Three-Way Merge Diff
Self-running — teal/orange/gold braid the merge branches
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Unsigned Rank Percentile Field
Self-running — the field recolours by unsigned rank
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Gap-Buffer Rope Editor
Self-running — text blocks slide across the gap
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Gather-Scatter Permutation
Self-running — the grid shuffles kaleidoscopically
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In-Place Block Rotate
Self-running — the barber-pole marquee rotates in place
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Overlap-Move Mosaic
Self-running — the mosaic shears down-right, then up-left
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Width-Sweep Sort Gallery
Self-running — four panels sort, reshuffle, and sort again
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7 LZSS Mode 7 Gallery
Self-running — progress is measured work; D/C/V report stage frames
Rendering & Graphics
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HDR Additive Bloom
Self-running — the lights drift and blow out on their own
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Polygon Scanline Fill (VLA)
Self-running — the star tumbles and morphs on its own
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CRC32 Hash-Marble Texture
Self-running — the hash field flows and mutates on its own
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Type-Pun Metaballs
Self-running — the blobs merge and split on their own
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Newton Reciprocal Floor
Self-running — the floor scrolls toward the horizon
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Many-Arg Color Grade
Self-running — the scene re-grades through looks
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Funnel-Shift Kaleidoscope
Self-running — the mandala animates as the shift count sweeps
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Rotozoom
Self-running — the texture spins and breathes
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Median Denoiser
Self-running — the wipe sweeps between noisy and clean
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Perlin Noise
Self-running — the noise field drifts like smoke
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Gouraud Triangle
Self-running — the shaded triangle tumbles
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Floyd-Steinberg Dither
Self-running — the gradient resolves into dither
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Fabs Ridgeline
Self-running — the terrain undulates as seeds drift
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Sobelscope
Self-running · brighter = stronger detected edges
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Matrix Cascade
Self-running · wireframe lattice tumbles under matrix transforms
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Rotate-Register Kaleidoscope
Self-running — ring registers precess producing counter-rotating petals
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Saturating-Cast Kaleidoscope
Self-running — saturation boundary pulses as phase sweeps
Video Playback
Signals & Audio
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Software Vectors
Self-running — BRK and COP packets traverse their own vector lanes
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64K Bank-Boundary Walk
Self-running — two walkers cross the gold 64K bank seam
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Mid-Bracket NMI Tunnel
Self-running — NMI needle cuts through the native-width tunnel
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Seismograph Absolute Trace
Self-running — gold signed trace and cyan rectified envelope
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Far-Pointer Spill Funnel
Self-running — pointer ribbons squeeze through registers and spill parking slots
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Motion-Detect Difference Field
Self-running — three width lanes track the same drifting motion silhouette
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Inline-Asm Island
Self-running — moving scan lines cross the red assembly island
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Split-Personality Link
Self-running — the split field visualizes calls crossing the A8/A16 boundary
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VBlank Interrupt Tally
Self-running — 120 interrupts fill the field, then the verified tally holds
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FFT Spectrum Analyser
Self-running — no controls
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IIR Resonant-Filter Scope
Self-running — the resonators are plucked and ring on their own
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Step-Sequencer VM (Sparse Switch)
Self-running — the VM plays its bytecode song on its own
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DCT Bloom
Self-running · source block + DCT coefficient heat grid
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ADPCM Waverider
Self-running · decoded ADPCM waveform on a scope
Big Numbers
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7 64-Bit Avalanche
Self-running — no controls
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Bignum Factorial
Self-running — no controls
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π Spigot + Monte-Carlo
Self-running — no controls
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Signed 64-bit Odometer
Self-running — the odometer tape ticks through zero
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Cosmic Zoom Ruler
Self-running — the bar sweeps up the powers of ten
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Multi-Base Clock
Self-running — the same instant ticks in four bases
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Diffie-Hellman Colour-Mixer
Self-running — the shared secret is always agreed
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Borrow-Ladder Odometer
Self-running — a 128-bit binary counter ticks down
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64-bit Multiply-Overflow
Self-running — orbiters spark on 64-bit overflow
Ciphers & Bit Tricks
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64-Bit Limb-Seam Barrel
Self-running — three shift bands sweep the highlighted limb seams
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TEA Cipher Avalanche
Self-running — no controls
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Truchet · Packed Bitfields
Self-running — no controls
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Cross-Byte Bitfields
Self-running — decoded fields colour a scrolling map
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Bit-Census Field
Self-running — the field scrolls and the intrinsic cycles
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Perfect-Shuffle Transition
Self-running — the image scrambles and reassembles
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GF(2⁸) Galois Field
Self-running — the field plaid morphs, the syndrome updates
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Montgomery Orbit
Self-running · division-free modmul star polygon
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Bit-Banged UART Eye
Self-running — a serial eye diagram, rails and crossings shimmer
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Serial Bit-Reversal Weave
Self-running — a gradient shown through its bit-reversed order
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Dual-LFSR Scrambler
Self-running — two interleaved pseudo-noise fields scroll
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Bit-Serial CRC Wall
Self-running — a bit-serial CRC hash marble flows
Games & Classics
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Bytecode-VM Turtle
Self-running — no controls
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Space Invaders
← → move · Z/X/A fire · Enter play · Shift attract
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7 Blossom
← ↑ ↓ → pan · Q/W zoom · X/A attractor · Shift colour
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Brainfuck Threaded-Code VM
Self-running — the VM interprets Hello World on a loop
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Division Clock + Odometer
Self-running — the clock sweeps and the odometer rolls on their own
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Free-List Pool Allocator
Self-running — sparks are born and die as the pool recycles slots
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Protothread Critters
Self-running — each critter runs its own patrol
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PlyOracle
Self-running · AI self-play; HUD tallies X/O/draw
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6502 CPU Simulator
Self-running — the disassembly scrolls, ALU gates light up
Cartridge & Mapping Tests
Each ROM boots in the bsnes-jg WASM core — no install, no plugin. Hit Verify fidelity on any demo page to replay the CI gate live in the browser.