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The console arc's notebook

The family's rule is that a milestone is a document twice: the plan, written before the code with its checks and tolerances stated, and the report after it, every figure a measurement with its run stamp. Those documents live in their own repositories and this tree pulls them in at build time, in the arc's order, so a reader has them in one place and the repositories stay the one copy. Where a report says a number, it is the number the run printed; where it says authored, it is a claim labelled as one.

sketch	The sketch the whole arc runs on: what functional means, the shape, the milestones N0 to N8, the scope session and the decision record.
n0-report	N0: the contract. The pin tables, the dot frame and the cartridge edge as one dependency-free crate, held to the recorded runs.
a0-report	A0: the 2A03 at the switch level, bit for bit against its reference with no list of exceptions.
a3-report	A3: first sound. A program's note read off the chip's own output node, and the mixer as a labelled claim.
n3-plan	N3, written first: the fast 2A03: the 6502's fast core with the decimal adjust disconnected, the APU as measured tables.
n3-report	N3: the fast 2A03 built and held at the pins, the APU's tables measured out of the chip, the stalls frame for frame.
p0-report	P0: the 2C02 at the switch level, its reference replayed, the supply-gated transistors found.
p1-report	P1: the PPU through its harness, the DAC held, the reset-less latches named.
p2-report	P2: sprite 0, the vblank read race and OAM corruption, each pinned by a register program the reference replays blindly.
p3-plan	P3, written first: the fast PPU, a stepper whose sequencer is a table measured out of the switches.
p3-report	P3: the fast PPU dot for dot with the chip on three worlds, the write path, the blank picture.
ntsc-spec	The NTSC signal path's specification, v0.3, ratified: sources, the decoder's filters, the CRT stages, the capture.
m0-report	M0: the grid, the residues and the data every later stage stands on.
m1-report	M1: the encoders against their reference.
m2-report	M2: the decoder filters, notch and combs, held to their reference and to each other.
m3-report	M3: the CRT stages, every parameter authored and labelled.
m4-report	M4: the capture source, the synthetic roundtrip, and the first real console records scored against the family's own synthesis.
m5-report	M5: the self-counts, the divergences and the spec's ratification.
ntsc-divergences	Where the signal path knowingly departs from the published references, each with its reason.
n4-report	N4: the mainboard's glue, each part held to its datasheet and labelled authored.
n5-report	N5: the console. Both chips on one clock, the seam held to the switch-level chips, blargg's ROMs run end to end.
n6-plan	N6, written first: the picture through ntsc-crt, and the capture comparison with its tolerances stated.
n6-report	N6: the picture, the blank picture measured on the PPU, the capture roundtrip's figures recorded and not fitted.
n7-plan	N7, written first: the sound through the board's audio stage read off the schematic.
n7-report	N7: the sound, blargg's mixer ROMs cancelling, his real-hardware recordings beside.
n8-plan	N8, written first: the shell, the GPU picture, the pacing, the second target.
n8-report	N8: the shell built and checked headlessly, the GPU picture held to the CPU chain, the wasm target measured.
bench-plan	The bench, written first: the part and the model under one input history, a controller-port bridge, relays and the scope under one script, B0 to B3 with their checks.
bench-wiring	The bridge's wiring: the register that is the pad, the level shifter, the ESP32-C6's pins, the head's relays, and the meter checks that come before power.
bench-script	The bench script: one file's words for the head and the model, bytes by latch index, the arm, the trigger, the capture.
bench-report	The bench's running report: B0 to B3 on the machine side, each tool green on a synthesis with a red mutation; the die answered B0's DMC question first and the model changed for it.
bench-build	The electronics review's sheets: the bridge as a schematic (v1), the extended bridge (v2), one poll as timing lanes, and an original pad as a phone's pad; parts lists and the build order.