Watch it run
The machines, running in the page. Nothing here is a recording: every frame, every trace and every byte is computed while you look at it, on models built from the chips' own transistors.
The NES at human speed
The console's model slowed down until a person can watch it work: a frame drawn dot by dot, the line as volts on the wire, a real game's frame measured, and the picture chip running transistor by transistor.
/nes/playground8,257 words46 links outPlay
The console from the repository running in the page: both fast chips, the sound, and the signal path's three-line comb, on a cartridge from your own disk.
/nes/play565 words14 links outThe explorer
A transistor-level MOS 6502, drawn from the die and lit by what it is doing.
/6502/explorer1,086 words7 links outTracer: the whole circuit, one half-cycle at a time
Every node and every edge of the MOS 6502 on one screen, at their positions on the die, lit by the transistor-level simulation and re-marked at each half-cycle with everything that moved, beside the program that is running.
/6502/tracer6,528 words9 links outHalfwave Lab
A 6502, half a clock phase at a time. Every value read off the running die.
/6502/lab1,011 words9 links outDie Runner
A console on a transistor-level MOS 6502. Every frame is run on the real die.
/6502/games478 words11 links outThe ntsc bench
The signal path running in your browser: NES dots encoded to the composite waveform and decoded by the filter you choose, with the drift counters visible.
/nes/signal/bench358 words9 links outComposite, terminated
A real NES's composite video read off the scope into the 75 ohms it was built to drive: the scanline, the burst, the levels beside the transcribed table, and what measuring without the terminator had made look bigger.
/nes/signal/composite926 words9 links outhotbits
True random bytes from radioactive decay: a Geiger counter on a Pi, with bits taken from the timing between events.
/hotbits270 words9 links outThe entropy, drawn
Four views of the same radioactive decay: a 3D field, a return map, a bit raster, and the measurements in phase space. Read from the archive, never the fresh pool.
/hotbits/space288 words8 links out
The words and the links beside each page are counted off the page itself, by the crawl that keeps the site's map. A page with a lot of words and few links is something to read; one with many links is another list. A page can be behind two doors: an instrument is a thing to watch and a thing to build on. Every address here is the one it has always had.